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Jammy Top Load Trailer Breakaway Kit with 12V 5Ah Battery & Switch, J-BBK


Regular price $32.49 USD
Shipping calculated at checkout.

Care information

To ensure optimal performance and extend the service life of your new trailer components, please follow these care guidelines after purchase:

  • Before installation, check all parts for shipping damage or missing components. Do not install damaged parts.
  • Always use correct tools and torque settings. Improper installation can lead to premature wear or failure.
  • For bearings, suspensions, and brake components, apply high-quality trailer grease before first use if not pre-greased.
  • Some parts (like brake assemblies) require a short break-in period to achieve full performance. Follow manufacturer instructions for best results.
  • Recheck fasteners, grease levels, and moving components after 100 miles of towing, then at regular intervals.
  • After exposure to water, road salt, or mud, clean and dry parts thoroughly. Apply anti-rust treatment if needed.
  • If storing unused parts, keep them in a dry, sealed container away from moisture and direct sunlight.

Delivery and Shipping

Handling Time: Orders ship out within 1 business day after payment is received.

Shipping Methods: We use trusted carriers like UPS, FedEx, or USPS based on package size and destination.

Delivery Time: Estimated delivery within 2–6 business days (U.S. domestic orders).

Tracking: A tracking number will be provided once your order is dispatched.

This brake assembly fits most standard 7,000 lb trailer axles that use 12" × 2" electric brakes with a 5-bolt mounting flange. Please verify your axle rating and brake dimensions before ordering. If you're unsure, send us your axle tag or hub information and we'll help confirm compatibility.
Yes. It is compatible with many standard Dexter, Lippert, Rockwell American, AL-KO, and other 7,000 lb trailer axles that use a standard 12" × 2" brake assembly. Always verify your axle specifications before purchasing.
Yes. This is a self-adjusting electric brake assembly, which automatically maintains proper brake shoe clearance during normal operation. This reduces maintenance and helps provide consistent braking performance.

Product Overview: 

Equip your electric-brake trailer with the Jammy J-BBK Top Load Trailer Breakaway Kit, designed to provide an independent power source for trailer brake activation if the trailer separates from the tow vehicle. The kit includes a 5Ah battery, removable plastic battery box, breakaway switch, mounting plate, safety strap, and hot and ground wires for installation. 

The removable top-load battery box provides convenient access to the battery while helping protect it during normal trailer use. A black powder coated mounting plate and safety strap secure the assembly to the trailer, while the included breakaway switch provides the emergency activation point for the trailer braking system. 

The mounting bracket can be installed using either a bolt-on or weld-on configuration, allowing the system to fit different trailer setups. The J-BCH battery charger is not included and must be purchased separately if charging capability is required.

What's Include by Kit Option: 

1 x Removable Plastic Battery Box

1 x 12 Volt/5 Amp Battery

1 x Black Powder Coated Mounting Plate and Safety Strap

1 x Breakaway Switch with Pull Cable

1 x Hot Wire

1 x Ground Wire

notes: J-BCH Battery Charger not included

Specifications: 

Brand: Jammy Incorporated

Product type: Top Load Trailer Breakaway Kit

Part number: J-BBK

Battery capacity: 5Ah

Battery voltage: 12V

Mount options: Bolt-on or weld-on bracket

Mounting component: Black powder coated mounting plate and safety strap

Battery storage: Removable plastic battery box

Wiring details: Hot and ground wires included

System components: Breakaway switch included

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