Couplemate Express Trailer Parts

12-inch Off-Road Brake Magnet

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Price

Price range: $21.25 through $23.50 Inc.GST

  • Rugged Off-Road Performance: Engineered with a heavy-duty centre design optimized for rough-road vibrations, corrugations, and demanding off-road towing environments.
  • Anti-Rattle Plastic Core: Features a high-temperature protective plastic insert that eliminates metal-to-metal contact, extending magnet life while reducing overall noise and rattle.
  • Clip-Free Slit Design: Utilises an off-road style slit configuration that completely omits the traditional retaining clip, preventing component failure on harsh terrains.
  • Universal Compatibility: Perfect replacement option designed to fit seamlessly onto standard 12-inch electric backing plates.

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12-inch Off-Road Electric Caravan Brake Magnet

Caravan off-road 12-inch electric brake magnets are suitable for all-electric brake systems except older round magnet brake systems.

Fits most 12-inch electric backing plates.

What 12V current do Electric Brake Magnets draw?

Magnets draw approximately 3.2 A.

If magnets are drawing significantly more power, then the wiring is suffering voltage loss due to a smaller cable being used for the length of the run.

The solution is to double the cable size.


Brake Magnets and the difference between 10-inch and 12-inch

  • 10-inch brake magnets have Green leads, except for Dexter Genuine Magnets, which have black leads.
  • 12-inch brake magnets have white leads, except for Dexter Genuine Magnets, which have black leads.
  • 12-inch magnets sold with green leads are 10-inch magnets with less copper wire and lower braking capacity.

12-inch brake magnets actuate the brakes on caravans. A typical setup consists of two electromagnets attached to the electric backing plate of the brake assembly. When the brake controller is activated, it sends electric current to the magnets, causing them to attract. This pulls the brake shoes against the brake drum, stopping the trailer.


How to check magnet wear

  • Check the four small holes on top of the magnet.
  • These holes are warning indicators that display magnet wear.
  • Extreme magnet wear occurs if there are no holes or fewer than four holes.
  • When the magnet holes on the face are worn, it is time to replace the magnet.

Electric Brake Magnet in our Range of Products


Frequently Asked Questions & Usage Tips

  • DO check your wiring polarity: Ensure you correctly identify and connect the brake lines, as incorrect wiring can cause weak braking or complete magnet failure.
  • DO inspect the drum surface: Always check the inner face of your brake drum for deep scoring or uneven wear before installation, and machine or replace the drum if necessary.
  • DO bed in your new magnets: Allow the new magnets to dynamically seat against the drum surface by applying the manual brake controller override gently during your first short trip.
  • DO verify left and right orientation: Double-check your backing plate side, as off-road magnets must be oriented correctly relative to the forward rotation of the wheel.
  • DON’T use standard clips on rough roads: Avoid installing traditional retaining clips if your off-road magnet uses a clip-free slit design, as vibrations will fatigue and snap them.
  • DON’T allow grease on the magnet face: Never touch the friction surface with greasy hands or let bearing grease contaminate the magnet, which drastically reduces braking efficiency.
  • DON’T ignore wiring insulation: Do not leave bare wires or loose connections exposed to the elements, as off-road water crossings will quickly short out the electric circuit.
  • DON’T mix old and new components: Avoid pairing a brand-new off-road brake magnet with a heavily worn arm or severely pitted drum, as this causes uneven braking and premature wear.

Additional information

Weight 0.5 kg
Dimensions 10 × 5 × 4 cm
Side

Drivers Side, Passengers Side

Voltage

12 Volts

Application

Campers, Caravans, Off-Road, Tandem Trailers, Towing, Trailer

Our Service Lifetime Warranty

Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.

Couplemate™ is a manufacturer and vendor of high-quality towing, trailer, and caravan components. Couplemate™ Core Goods and Custom Work are guaranteed to be free of defects for the service lifetime of the product when used as intended.

Warranties are non-transferrable and Couplemate™ requires satisfactory proof of purchase prior to issuing a remedy. The full Couplemate™ Warranty Policy can be found in the Terms & Conditions: Section 8 – Consumer Guarantees & Warranty.

Warranties are in addition to your rights under the Australian Consumer Law. If something is wrong with your order, please contact our team.

60-Day Returns

After 60 years of experience, we know that life has its unpredictable moments.

All Couplemate™ orders (online, over the phone, or in-store) have a 60 day period for change-of-mind returns and exchanges. There are some items that can’t be returned and some returns may incur a 15% restocking fee.

You can view our full policy for change-of-mind returns here.

★★★★★
Verified Outback Tourer

Highly Recommended for Corrugations

“The standard magnets kept snapping their arms on severely corrugated outback tracks due to metal-on-metal vibration. I upgraded to this 12-inch, off-road-specific magnet with the high-temp plastic sleeve core, and the difference is massive. It eliminates the metal rattle completely. Make sure you buy the Right Hand version for the driver’s side, as they are side-specific!”

★★★★★

DIY Caravaner

Easy Clip-Free Install

“Excellent replacement for my worn-out AL-KO backing plate magnet. Love the design because it doesn’t use those annoying small retaining clips that always pop off in the bush. Just slipped it on with a rubber band to keep it snug during the initial brake assembly install, and it seated perfectly after the very first application.”

★★★★☆

Heavy Tow Specialist

Excellent Braking Force

“Replaced both the driver and passenger sides simultaneously to ensure even braking distribution. These high-output magnets give an immediate, sharp bite when power is sent from the brake controller. The slit design handles dirt shedding much better than standard crosshair models.”

★★★★★
Off-Grid Camper
Worth the Extra Cost

“They cost a bit more than standard trailer magnets, but they are absolutely worth it if you track dirt roads. The plastic core insert prevents structural stress fractures that could destroy the magnet arm. Perfect fit on my 12-inch off-road backing plate assembly.”

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