Your winch clicks, the motor never turns, and the trail goes quiet at exactly the wrong moment. In most cases the winch itself is fine and the small black box that switches its power has given up. This guide names the five replacement solenoids worth buying, explains which rating your winch actually needs, and shows how to wire the new one without guessing.
The 30-second answer
Buy the KanSmart 12V 250A for ATV and UTV winches up to 5,000 lb, the KanSmart 12V 500A for truck winches from 8,000 to 15,000 lb, the WATERWICH 500A kit if you want wireless remotes included, the EZROAD 72631 four-pack if your WARN heavy-duty winch uses the classic four-solenoid pack, and the KFI ATV-CONT if you want the genuine KFI replacement for a KFI winch kit.
How we researched this guide
We compared 9 solenoid and contactor listings, checked the WARN 63105 replacement instructions, the KFI SE25 manual and the KFI solenoid bulletin, and read the Albright DC88 and SW200 datasheets to separate solenoid packs from sealed contactors. Every rating below comes from the listing or the maker document, never from memory.
We also reviewed owner troubleshooting reports on Off-Road Pull and the Forestry Forum, where the same failure pattern repeats: a winch that clicks but will not move, pitted contacts, and a replacement rated too low for the winch it serves. Where owner coverage for one exact part number is thin, this guide says so instead of inventing praise.
Quick picks
Best Overall
KanSmart 12V 250A Winch Solenoid Relay Contactor
Best if your ATV or UTV winch only clicks. Sealed 250-amp unit with a thumb switch and caps, and the widest OEM fitment list in this guide.
Best Heavy-Duty Value
KanSmart 12V 500A Winch Solenoid Relay Contactor
Best if your truck winch needs real current. A sealed 500-amp unit rated for 8,000 to 15,000 lb winches, with caps included.
Best Wireless Kit
WATERWICH 12V 500A Winch Solenoid with Wireless Remote Kit
Best if you want to stand clear of the line. A 500-amp solenoid with two wireless remotes, about 164 feet of range, and a waterproof receiver.
Best for WARN Heavy-Duty
EZROAD 12V Winch Solenoid Relay 72631 4-Pack
Best if your WARN truck winch uses the classic four-solenoid pack. Four fresh 72631 units at once, so the whole pack is new.
Best OEM Replacement
KFI Products ATV-CONT Replacement Winch Contactor
Best if you run a KFI winch and want the genuine part. The KFI replacement contactor, with KFI manual torque figures to fit it right.
Compare at a glance
| Product | Winch size | Rating | Mount | Check Price |
| KanSmart 12V 250A Winch Solenoid Relay Contactor | 2,000-5,000 lb | 250A, 12V | Chassis mount | Check Price |
| KanSmart 12V 500A Winch Solenoid Relay Contactor | 8,000-15,000 lb | 500A, 12V | Chassis mount | Check Price |
| WATERWICH 12V 500A Winch Solenoid with Wireless Remote Kit | 5,500-12,000 lb | 500A, 12V | Panel mount, bracket included | Check Price |
| EZROAD 12V Winch Solenoid Relay 72631 4-Pack | 8,000-16,500 lb class | 12V, 4-pack | Socket mount | Check Price |
| KFI Products ATV-CONT Replacement Winch Contactor | KFI ATV/UTV kits | 12V | Screw terminal mount | Check Price |
Solenoid size calculator: match the rating to your winch
Enter your winch rated line pull. The calculator applies the sizing rule from this guide and names the pick from this article that fits. It never recommends a solenoid below your winch size.
How to choose a winch solenoid
Match the amp rating to the winch, not the battery
A solenoid must carry the motor full-load current, which rises fast with line pull. A 250-amp unit suits winches up to about 5,000 lb, while truck winches from 8,000 lb up need a 500-amp unit. Fitting a 250-amp solenoid to a 12,000 lb winch is the most common reason a new solenoid burns out in weeks, so buy the rating first and the brand second.
Count the terminals before you order
ATV and UTV contactors usually have four main terminals plus small spades for the switch wires, while the classic WARN heavy-duty pack uses four separate solenoids, one per motor direction and side. Compare the terminal layout in the listing photos with your old unit before you order, because a unit with the wrong layout cannot be wired safely no matter how good its rating is.
Sealed case beats open frame in mud and water
A sealed, powder-coated case keeps mud, wash water and road salt off the contacts. Open-frame solenoids cost less and are easy to inspect, but they corrode faster on a machine that sees water crossings. If your winch lives low on an ATV or behind a bumper, choose the sealed unit and mount it high and dry.
Check the switch in the box
Many ATV kits ship with a thumb or rocker switch and six protective caps, which saves a second order and a second shipping wait. If your old switch still works, you can keep it, but a new switch removes the second most common failure point. Kits with wireless remotes add range, so you can stand clear of the line while you winch.
Confirm the OEM cross-reference numbers
Listings quote the part numbers they replace, such as WARN 63070, 62135, 74900 and 2875714 for ATV contactors, or WARN 72631 and 28396 for heavy-duty solenoids. Match at least one number to your old unit or your winch manual. A close-looking unit with no matching reference is a guess, and guesses strand winches.
Mount it isolated, dry and reachable
The WARN 63105 instructions are blunt: the replacement solenoid housing must stay electrically isolated from the vehicle chassis, and the mounting spot must stay protected and dry. Pick a location you can reach for a test with a multimeter later. A solenoid buried behind a bumper that you cannot reach is a solenoid you cannot diagnose.
Solenoid rating by winch size
Use this table as a floor, not a target. Going one rating up never hurts a winch; going one rating down is how contacts weld shut. If your winch draws more than the table assumes, follow your winch manual, which always wins over a general table.
| Winch size | Minimum solenoid rating | Our pick |
| Up to 5,000 lb | 250 amps, 12V | KanSmart 12V 250A |
| 5,001 to 8,000 lb | 500 amps, 12V | KanSmart 12V 500A |
| 8,001 to 12,000 lb | 500 amps, 12V, sealed | WATERWICH 500A wireless kit |
| Above 12,000 lb | 500 amps, 12V, sealed | KanSmart 12V 500A |
Best winch solenoid by budget
| Budget tier | What you get | Example pick |
| Budget | One sealed 250-amp contactor with switch and caps for a small ATV or UTV winch | KanSmart 12V 250A |
| Mid-range | A 500-amp sealed unit for truck winches, or a wireless kit with two remotes | KanSmart 12V 500A |
| Best value | Four fresh heavy-duty solenoids at once, so the whole classic WARN pack is new | EZROAD 72631 four-pack |
| OEM replacement | The genuine KFI contactor made for KFI winch kits, with KFI manual torque figures | KFI ATV-CONT |
Types of winch solenoid
| Type | How it works | Pros | Cons | Best for |
| Sealed contactor | One sealed unit switches both directions with an electromagnet | Quiet, weatherproof, one part to replace | Costs more, sealed so you cannot clean contacts | ATV, UTV and modern truck winches |
| Solenoid pack | Four separate solenoids, one per circuit, with an audible click | Cheap to repair one circuit at a time | Noisy, open to mud and corrosion | Classic WARN XD9000, M8000 and VR truck winches |
| Reversing contactor | A sealed monoblock with a failsafe against both coils firing | High current capacity and clean wiring | Needs correct coil voltage and careful wiring | Competition builds and heavy-duty upgrades |
| Solenoid plus remote kit | Contactor bundled with wired or wireless remotes | Everything in one box, stand clear while winching | Wireless receiver adds a part that can fail | Recovery work where distance from the line matters |
Detailed reviews: the five solenoids in this guide
Each review below gives the rating, the fitment list and the honest limits of the listing, so you can match the part to your winch instead of trusting a title alone. Browse the full Winch Solenoids category archive for every solenoid guide on this site.
Best Overall: KanSmart 12V 250A Winch Solenoid Relay Contactor
Best Overall — best fit for most ATV and UTV winches
Why the KanSmart 250A is our pick
It is rated 250 amps at 12 volts, which covers the full-load draw of the ATV and UTV winches it lists, and it ships with the thumb switch and six protective caps that a trail repair actually needs.
KanSmart 250A key specs
- Coil voltage: 12 volts DC
- Current rating: 250 amps
- Contact material: silver
- Contact type: normally open
- Terminals: M8 input and output studs
- Mounting: chassis mount
- Switch: thumb rocker switch included
- Protective caps: 6 included
- Case: sealed, powder-coated steel
- Replaces: WARN 63070, 62135, 74900, 2875714, 70715
- Warranty: lifetime manufacturing-defect cover per listing
- Weight: listed as 0.01 ounces (listing error, ignore)
KanSmart 250A: fits and best for
Fits WARN A2000, A2500, U2500, 1.5ci, 2.5ci, 3.0ci and the RT and XT ranges, Vantage and ProVantage winches from 2,000 to 4,500 lb, plus KFI ST17, S2000, A2500, A3000 and U4500 kits, Ramsey ATV2500 and ATV3000, Superwinch Terra and LT ranges, and the Champion and Smittybilt models in the listing.
KanSmart 250A pros and watch-outs
- 250-amp rating matches ATV and UTV winch draw
- Thumb switch and six caps included in the box
- Widest OEM cross-reference list of any pick here
- Sealed steel case resists mud and wash water
- M8 studs take standard battery cable lugs
- Too small for any truck winch above 5,000 lb
- Listing warranty text conflicts: lifetime cover in one place, one year in another
- Listing weight figure is plainly wrong
- No wireless remote in the box
KanSmart 250A: what owners report
Owner troubleshooting guides report the same pattern this part fixes: a winch that clicks once and never turns, traced to pitted contacts inside the old contactor, with a fresh unit restoring normal in and out on the first test. Off-Road Pull solenoid test guide
Equipment owners on the Forestry Forum stress amp rating over brand when a replacement fails early, and note that a correctly rated unit outlasts a cheap undersized one by a wide margin. Forestry Forum solenoid advice
Owner coverage for this exact KanSmart part number is thin in forums, so the points above describe the part class and the failure it repairs rather than long-term reports on this one listing.
KanSmart 250A: who should not buy
Do not buy the 250-amp KanSmart for a truck winch. Step up to the KanSmart 500A in this guide instead, and read what size winch do I need if you are unsure of your winch class.
KanSmart 250A: pair it with
A spare in the tool bag costs little and saves a trip: best winch recovery kit lists what else belongs in that bag.
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See how to wire a winch switch on an ATV for the full routing.
Best Heavy-Duty Value: KanSmart 12V 500A Winch Solenoid Relay Contactor
Best Heavy-Duty Value — best 500-amp value for truck winches
Why the KanSmart 500A is our pick
Truck winches from 8,000 to 15,000 lb pull far more current than an ATV unit can switch, and this listing rates the unit at 500 amps on a 12-volt coil with a sealed case and six protective caps.
KanSmart 500A key specs
- Coil voltage: 12 volts DC
- Current rating: 500 amps
- Contact current rating: 500 amps
- Winch range: 8,000 to 15,000 lb per listing
- Case: sealed, corrosion resistant
- Protective caps: 6 included
- Mounting: chassis mount
- Replaces: WARN 63070, 62135, 74900, 2875714, 70715
- UPC: 748743507751
- Warranty: not published on the listing
- Terminals: not published on the listing
- Weight: not published on the listing
KanSmart 500A: fits and best for
Fits 12-volt truck, Jeep, SUV and trailer winches rated from 8,000 to 15,000 lb, including the WARN, KFI, Ramsey, Superwinch and Smittybilt models named in the maker cross-reference.
KanSmart 500A pros and watch-outs
- 500-amp rating suits real truck winch draw
- Sealed case for mud, water and road salt
- Same mounting style as the 250-amp KanSmart
- Rated for winches up to 15,000 lb
- Six protective caps included
- Terminal size not published, so check the listing photos
- Warranty not published on the listing
- No switch or remote in the box
- Overkill and oversized for a small ATV winch
KanSmart 500A: what owners report
Owner guides on contactor failure stress the same rule this pick follows: a solenoid rated below the motor draw welds its contacts, while a correctly rated sealed unit keeps working after the same pulls. Off-Road Pull contactor vs solenoid guide
Forum owners who run heavy winches note that 500-amp class units are the floor for 12,000 lb pulls, and that a cheap 250-amp unit on a big winch is a repeat purchase, not a saving. Forestry Forum solenoid advice
Owner coverage for this exact KanSmart 500A part number is thin, so treat the rating and the sealed case as the buying reasons, and confirm terminal size from the listing photos before ordering.
KanSmart 500A: who should not buy
Do not buy the 500-amp KanSmart for a 2,500 lb ATV winch. Buy the KanSmart 250A instead, and see best 2500 lb winch for the winch class it serves.
KanSmart 500A: pair it with
Pair it with heavy battery cable of the gauge your winch manual specifies, and a battery that holds voltage under load. Our best winch battery guide explains the battery side of the same problem.
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Mount the unit high, dry and isolated from the chassis, and keep the caps on. See how to mount a winch for placement thinking.
Best Wireless Kit: WATERWICH 12V 500A Winch Solenoid with Wireless Remote Kit
Best Wireless Kit — best kit with wireless remotes included
Why the WATERWICH 500A is our pick
It ships a 500-amp solenoid with two wireless remotes and a receiver rated IP65, with a stated range of about 164 feet, so you can operate the winch from clear of the rope. One honest flag: the listing title rates the unit at 500 amps while its own duty note describes 250-amp intermittent bursts of up to 10 seconds with 20 to 30 seconds of cooling.
WATERWICH 500A key specs
- Coil voltage: 12 volts DC
- Current rating: 500 amps per listing title
- Duty note: 250-amp intermittent bursts, 10 seconds max
- Cooling: 20 to 30 seconds between cycles per listing
- Remotes: 2 wireless remotes included
- Remote range: about 164 feet (50 m)
- Receiver: IP65 waterproof design
- Winch range: 5,500 to 12,000 lb per listing
- Case: shatterproof, corrosion resistant
- Mounting: pre-cut bracket for control box
- Protective caps: 6 included
- Warranty: not published on the listing
WATERWICH 500A: fits and best for
Fits universal 12-volt solenoid winches on trucks, Jeeps, ATVs, UTVs, SUVs and trailers from 5,500 to 12,000 lb.
WATERWICH 500A pros and watch-outs
- Two wireless remotes included, about 164 feet of range
- IP65 receiver keeps rain out of the control side
- Pre-cut bracket makes control-box mounting easy
- 500-amp title rating for truck winches
- Six protective caps included
- Listing duty note conflicts with the 500-amp title rating
- Intermittent duty only: needs cooling time between pulls
- Wireless receiver is one more part that can fail
- No wired thumb switch in the box
WATERWICH 500A: what owners report
Owner reports on wireless winch control consistently value the distance it buys: standing clear of the rope while the winch works is a real safety gain, not a convenience extra. Off-Road Pull winch solenoid guide
The same owner sources warn that wireless receivers hate water and heat, so the IP65 rating on this receiver matters more than the remote range figure. Keep the receiver dry and shaded. Off-Road Pull winch solenoid guide
Owner coverage for this exact WATERWICH kit is thin in forums.
WATERWICH 500A: who should not buy
Do not buy this kit if you need continuous duty, such as long industrial pulls or repeated trailer loading without rest. A sealed contactor upgrade is the better route there, and our best wireless winch remote guide covers remote-only options for a healthy solenoid.
WATERWICH 500A: pair it with
Keep spare remote batteries in the glovebox with your recovery gear from best winch recovery kit.
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See how to use a winch without a remote for the backup plan if a remote dies mid-recovery.
Best for WARN Heavy-Duty: EZROAD 12V Winch Solenoid Relay 72631 4-Pack
Best for WARN Heavy-Duty — best way to renew a classic four-solenoid pack
Why the EZROAD 72631 is our pick
The EZROAD four-pack is the only pick here that matches how the classic WARN heavy-duty winches are actually built. Winches such as the XD9000, M8000, VR 8000, VR 10000 and VR 12000 use four separate solenoids, and replacing one while three tired ones stay in the box is a short-lived repair. This pack replaces WARN 72631 and 28396 with four new units, each with two 5/16-18 terminals and two 10-32 terminals, a continuous-duty design and an isolated base.
EZROAD 72631 key specs
- Coil voltage: 12 volts DC
- Quantity: 4 solenoids in the pack
- Replaces: WARN 72631, 28396, 440262, 546-033
- Terminals: 2 x 5/16-18, 2 x 10-32 per unit
- Duty: continuous duty per listing
- Base: isolated base
- Mounting: socket mount
- Contact material: copper
- Contact type: normally open
- Fits: WARN XD9000, M8000, M8000S, VR 8000-12000, 9.5ti, 16.5ti
- Current rating: not published on the listing
- Warranty: not published on the listing
EZROAD 72631: fits and best for
Fits WARN XD9000, XD9000i, M6000, M8000, M8000S, VR 8000, VR 10000, VR 12000, 9.5ti, 16.5ti and 16.5ti-S, plus the cross-referenced part numbers in the listing.
EZROAD 72631 pros and watch-outs
- Four units renew the whole pack at once
- Matches WARN 72631 and 28396 directly
- Continuous-duty design with isolated base
- Copper contacts and clear terminal sizes
- Cheapest per-solenoid route in this guide
- Replacement parts, not genuine WARN units
- Current rating not published on the listing
- No switch, caps or wiring in the box
- Only fits pack-design winches, not sealed contactor winches
EZROAD 72631: what owners report
Owner troubleshooting for pack-design winches follows one test: swap the trigger wires and see whether the fault follows the wire or stays on one side. That test only works when the pack design is understood, and it is the standard diagnosis in the owner guides. Off-Road Pull solenoid test guide
Forum owners who run older WARN truck winches report that replacing all four solenoids together ends the cycle of one failure following another a month later. Forestry Forum solenoid advice
Owner coverage for this exact EZROAD four-pack is thin.
EZROAD 72631: who should not buy
Do not buy this four-pack for a sealed-contactor winch such as a WARN Zeon or VR EVO, which has no solenoid pack to replace. Read WARN VR EVO 10 review to see the contactor design those winches use.
EZROAD 72631: pair it with
Our winch maintenance checklist covers the rest of the service routine.
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The WARN 63105 instructions insist the housing stays isolated from the chassis, so check that first. See how to wire a winch.
Best OEM Replacement: KFI Products ATV-CONT Replacement Winch Contactor
Best OEM Replacement — best genuine KFI replacement for KFI winch kits
Why the KFI ATV-CONT is our pick
The KFI ATV-CONT is the only genuine maker part in this guide, and that matters when the winch is a KFI kit. It is the replacement contactor KFI lists for its own ATV and UTV winch kits, with screw terminals and a normally open contact, and the KFI SE25 manual gives the fitting detail other listings skip: contactor terminal nuts torque to 4.5 N-m (40 in-lb), and over-tightening is a real way to crack the housing.
KFI ATV-CONT key specs
- Brand: KFI Products
- Part number: ATV-CONT
- Coil voltage: 12 volts (KFI 12V winch kits)
- Contact type: normally open
- Terminals: screw terminals
- Mounting: screw terminal mount
- Compatible: KFI Products ATV-CONT winch kits
- Terminal torque: 4.5 N-m (40 in-lb) per KFI manual
- UPC: 653020022080
- Current rating: not published on the listing
- Winch range: KFI ATV and UTV kits
- Warranty: not published on the listing
KFI ATV-CONT: fits and best for
Fits KFI Products ATV and UTV winch kits that list the ATV-CONT contactor, including the SE25, SE35 and SE45 Stealth ranges and the A2500, A3000 and U4500 kits named in the KFI cross-reference.
KFI ATV-CONT pros and watch-outs
- Genuine KFI part for KFI winch kits
- KFI manual gives the exact terminal torque
- Screw terminals are simple to fit and inspect
- No fitment guess when the manual names this part
- Long-standing listing with a stable part number
- Current rating not published on the listing
- No switch, caps or wiring in the box
- Only fits KFI kits, not a universal swap
- Warranty not published on the listing
KFI ATV-CONT: what owners report
KFI owners in the fitment lists report the contactor as a direct swap on the named kits, with the rocker switch wiring matching the KFI bulletin colours. KFI solenoid installation bulletin
The KFI SE25 manual itself is the strongest owner-adjacent source here: it describes the contactor as the sealed switch between battery and motor, and gives the torque figure that prevents cracked housings. KFI SE25 manual
KFI ATV-CONT: who should not buy
Do not buy the KFI ATV-CONT for a WARN, Superwinch or no-name winch. If you run a KFI machine, also see best ATV winch for plowing for the work these winches do.
KFI ATV-CONT: pair it with
Pair it with the KFI mini rocker switch if yours is worn, and a fresh set of terminal boots.
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Torque the terminal nuts to 4.5 N-m (40 in-lb) and no more, then tug each wire to confirm it is seated. See how to install a winch on an ATV.
Spec comparison
Side by side, the five picks separate on rating, coil voltage, terminals and what ships in the box. Where a maker does not publish a figure, the table says so rather than guessing.
| Spec | KanSmart 250A | KanSmart 500A | WATERWICH 500A |
| Coil voltage | 12V DC | 12V DC | 12V DC |
| Current rating | 250A | 500A | 500A title / 250A duty note |
| Terminals | M8 studs | Not published | Not published |
| Winch size | 2,000-5,000 lb | 8,000-15,000 lb | 5,500-12,000 lb |
| In the box | Switch + 6 caps | 6 caps | 2 remotes + bracket |
| Warranty | Lifetime defect cover | Not published | Not published |
| Check Price | Check Price | Check Price | Check Price |
| Spec | EZROAD 72631 | KFI ATV-CONT |
| Coil voltage | 12V DC | 12V |
| Current rating | Not published | Not published |
| Terminals | 5/16-18 + 10-32 | Screw |
| Winch size | 8,000-16,500 lb class | KFI ATV/UTV kits |
| In the box | 4 solenoids | Contactor only |
| Warranty | Not published | Not published |
| Check Price | Check Price | Check Price |
Installation & wiring basics
Disconnect the negative battery cable first, then the positive, and photograph the old wiring before you remove a single wire. The WARN 63105 instructions warn that the new solenoid housing must stay isolated from the chassis, so use the insulating mounts and boots that ship with the unit and never let a bare terminal touch the frame. Torque small contactor nuts gently: KFI lists 4.5 N-m (40 in-lb) for its contactor terminals, and over-tightening cracks the housing. Route the switch wires green to green and black to black on ATV kits, keep battery leads short and protected from heat and moving parts, then reconnect the battery and test in and out with no load before you trust the winch on a pull. If the winch clicks but will not move after the swap, read our guide to a winch solenoid that clicks but will not move before you order another part, and check the wiring steps in how to wire a winch and how to wire a winch to a truck battery. For ATV machines, see also how to wire a winch switch on an ATV.
Safety essentials
A solenoid controls hundreds of amps a few inches from your battery. Treat every wire like it is live until you have disconnected the battery, and never trust a single click to tell you the circuit is safe.
Disconnect the battery first. Remove the negative cable before you touch any solenoid terminal, and keep it clear while you work.
Stand clear of the line. Never stand in line with a loaded winch rope, and keep hands away from the drum and fairlead while the motor runs.
Use a winch damper. Drape a damper or heavy blanket over the rope on every loaded pull so a failure loses its energy close to the ground.
Wear gloves. Steel cable frays into sharp wires and synthetic rope picks up grit. Gloves protect your hands on every spool and rig.
Never hook the line to itself. Use a rated shackle and a tree saver or anchor point. A hook on its own line can slip or cut the rope.
Keep wraps on the drum. Keep at least 5 wraps of steel cable or 10 wraps of synthetic rope on the drum so the load never pulls on the anchor bolt alone.
Three recovery accessories belong in the same kit as your solenoid spares. Each one is a real, rated recovery item, not a generic add-on, and each one links to our own guide for the full sizing detail.
WARN Epic Snatch Block. Rated for heavy recovery pulls and built to take the side load of a doubled line. Keep it in the kit for any pull that needs more power or a change of direction.
GearAmerica Tree Saver Strap. A wide tree saver spreads the load and protects the bark. Never wrap a steel cable or a bare hook around a live tree.
AMBULL D-Ring Shackles. Rated shackles connect straps and rope to the vehicle without a hook that can slip. Carry at least two, and check the rating before every pull.
Read our full recovery-kit guide before your next trip: best winch recovery kit and essential winching accessories.
Troubleshooting
| Symptom | Likely cause | Fix |
| Winch clicks once, motor never turns | Pitted or burnt contacts inside the solenoid | Test voltage drop across the solenoid under load. More than 0.3 volts means the contacts are done. Replace the unit. |
| No click at all | No power to the coil, or a failed switch wire | Check battery voltage, then check the small trigger wires for 12 volts when you press the switch. Fix the wiring before replacing the solenoid. |
| Winch runs one way only | One solenoid in a four-pack has failed, or one trigger wire is loose | Swap the trigger wires to test. If the fault follows the wire, fix the wire. If it stays on one side, replace that solenoid. |
| Solenoid sticks on after you release the switch | Contacts welded shut from overload or low voltage | Disconnect the battery at once. Replace the solenoid with a higher-rated unit and check the battery and cable size. |
| New solenoid burns out in weeks | Rating too low for the winch, or a dragging motor | Match the rating to the winch size table in this guide, and test the motor draw. A dragging motor kills solenoids. |
| Intermittent cut-out on long pulls | Heat build-up in an intermittent-duty unit | Rest the winch between pulls, shorten the pull, and let the unit cool for 20 to 30 seconds between cycles. |
Who should NOT buy these
If your winch motor itself is burnt, a solenoid will not save it. Test the motor first with the steps in how to test a winch motor and read how to repair a winch motor before you spend money on switching parts. If your winch is a 24-volt unit, none of these 12-volt picks fit. A 12-volt coil on a 24-volt system burns out in under a minute, and the listings here are all 12-volt parts. If you want a sealed contactor upgrade rather than a like-for-like swap, read our solenoid eliminator guide for the contactor route, which changes the wiring and the mount. If the winch is still under warranty, ask the maker first, because an aftermarket solenoid can affect a warranty claim on the winch itself.
Final verdict
One line per pick, in the order this guide ranks them. Start at the top and stop at the first pick that matches your winch size and wiring.
Best Overall: KanSmart 12V 250A Winch Solenoid Relay Contactor — Check Price
Best Heavy-Duty Value: KanSmart 12V 500A Winch Solenoid Relay Contactor — Check Price
Best Wireless Kit: WATERWICH 12V 500A Winch Solenoid with Wireless Remote Kit — Check Price
Best for WARN Heavy-Duty: EZROAD 12V Winch Solenoid Relay 72631 4-Pack — Check Price
Best OEM Replacement: KFI Products ATV-CONT Replacement Winch Contactor — Check Price
FAQ
What does a winch solenoid do?
A winch solenoid is a heavy-duty switch that lets a small switch on your handlebar or remote control hundreds of amps to the winch motor. Pressing the switch energises a coil, the coil pulls the contacts closed, and battery power flows to the motor. Release the switch and the contacts open again. Without it, the full motor current would have to run through your hand control, which would melt the switch and the wiring.
How do I know if my winch solenoid is bad?
The classic sign is a single loud click with no motor movement, which usually means the coil works but the contacts are pitted and cannot pass current. No click at all points to the trigger wiring, the switch or the battery instead. Test coil resistance, which should sit near 2 to 5.5 ohms on a healthy 12-volt unit, and check voltage drop across the solenoid under load. More than 0.3 volts of drop means the contacts are done.
What amp solenoid do I need for my winch?
Match the solenoid to the winch size, not the battery. Winches up to 5,000 lb generally need a 250-amp solenoid, while truck winches from 8,000 lb up need a 500-amp unit. Check your winch manual for the full-load amp draw and buy a solenoid rated above it. A solenoid rated below the motor draw overheats, welds its contacts shut, and fails early.
Are all winch solenoids the same?
No. ATV and UTV winches usually use one sealed contactor with four main terminals, while classic WARN truck winches use four separate solenoids in a pack. Coil voltage, terminal layout, mounting and duty cycle all differ. Match the OEM cross-reference numbers, such as WARN 63070 or 72631, to your old unit before you order.
Can I replace just one solenoid in a four-pack?
Yes, and that is the main advantage of the pack design: one failed circuit costs one solenoid, not a whole control box. Replace the failed unit with the same part number, and check the other three while the box is open. If two or more have failed, replacing all four at once, as the EZROAD four-pack allows, is often the smarter repair.
What is the difference between a solenoid and a contactor?
The words overlap in listings, but the hardware differs. A solenoid pack uses separate open solenoids with an audible click, while a modern contactor is one sealed unit with magnetically held contacts. Contactors are quieter, better sealed and usually rated higher, which is why most new winches ship with them. The Albright SW180 and SW200 are the best-known sealed contactors in this class.
Can I bypass a winch solenoid to test the motor?
Yes, briefly and carefully, by jumping battery power direct to the motor terminals with heavy cable. If the motor runs, the solenoid or its wiring is the fault. If it does not run, the motor is the fault. Do this only as a bench test with the winch unloaded and the battery disconnected between steps, because a bypassed winch has no switch to stop it.
Why does my new solenoid keep burning out?
The most common cause is a rating below the winch draw, followed by low battery voltage, which makes the motor pull more current for the same work. Check the rating table in this guide, test the battery under load, and look for a dragging motor or a rope that is bird-nested on the drum. Short pulls with cooling time between cycles also help an intermittent-duty unit last.
How long should a winch solenoid last?
A correctly rated, sealed solenoid that stays dry should last for years of normal recovery use. Mud, water crossings, corrosion and repeated overload shorten that life fast. Keep the terminals coated, the caps on, and the unit mounted high and dry, and carry a spare on long trips, because a solenoid is small, cheap and easy to swap on the trail.
Sources
Manufacturer documents, owner guides and fitment references used for this guide. Every spec in the product blocks traces to one of these pages or to the Amazon listing for that part.
- WARN solenoid replacement kit mounting instructions, PN 63105 (WARN Industries)
- KFI SE25 Stealth winch manual: contactor wiring and 4.5 N-m terminal torque (KFI Products)
- KFI rocker switch and solenoid installation bulletin 5050004 (KFI Products)
- Albright DC88 motor-reversing contactor datasheet, IP67 sealed monoblock (Albright International)
- Albright SW200 single-pole contactor datasheet, 250A thermal rating (Albright International)
- Winch solenoid complete guide: wiring, testing, bypass (Off-Road Pull)
- Winch contactors vs solenoids: choosing the right component (Off-Road Pull)
- How to test a winch solenoid: troubleshooting and replacement guide (Off-Road Pull)
- Solenoid advice: amp ratings and duty discussion from equipment owners (Forestry Forum)
- RCI Tacoma winch control box relocation bracket guide (RCI Metalworks)
- Westin control box relocation bracket instructions for JL Wrangler and Gladiator (Westin Automotive)
- WARN Industries official site: winch and accessory documentation
- KFI Products official site: ATV and UTV winch kits and contactors
By Leo, Founder, WinchInsider
Leo researches winches and recovery gear from maker manuals, spec sheets and owner reports, and writes every guide so a first-time buyer can size, wire and use the gear safely.
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