Description

Overview

20A Auto Reset Circuit Breaker protects 12V trailer and vehicle circuits from overloads, while the Type I reset keeps the circuit cycling until the fault is cleared. The plated steel case and bolt-down bracket suit under-bonnet and chassis mounting where vibration, dirt and weather matter. It also suits secondary protection duties for motors, auxiliary batteries and other hard-working low-voltage circuits.

Features

• 20A current rating for 12V DC circuit protection.
• Type I automatic reset for repeat cycling after overload.
• Bolt-down flange bracket with two 10-32 stud terminals.
• Plated steel case suits exposed vehicle mounting positions.

Specifications and Materials

This breaker uses a plated steel case with integrated mounting bracket and two 10-32 stud terminals. The shorter stud takes battery power and the longer stud carries the load side, so wiring direction stays clear during installation. The compact body measures 51mm x 20mm x 31mm, which helps when space is limited around guards, chassis rails or battery hardware.

Part number: 30055-20-BL.

See the official datasheet for box style circuit breaker specifications

Compatibility and Fitment

Check the 20A Auto Reset Circuit Breaker against the circuit load, mounting space and terminal clearance before ordering. Also confirm the system is 12V DC and that the bracketed bolt-down style suits the intended position. If the job needs secondary protection for motors, auxiliary feeds or chassis-mounted accessories, this breaker gives a compact resettable option without moving to a fuse-only setup.

Compliance and Safety

Mount the breaker firmly, keep cable runs supported and tighten terminal hardware correctly before the vehicle returns to service. Then test the protected circuit under load and confirm the wiring follows the correct battery and load stud positions. Inspect the case and terminals after repeated trip events, because heat, vibration and loose connections can shorten service life.

Trailer Applications

Workshops fit the 20A Auto Reset Circuit Breaker into trailer auxiliary circuits, winch feeds, battery support circuits and other secondary protection jobs where a resettable breaker makes servicing easier. It also suits towing vehicles and plant builds that need a compact bracket-mount breaker on a 12V system. That keeps the protection hardware simple and accessible when the circuit lives under the bonnet or along the chassis.

Why Choose ICS Trailers

ICS Trailers supplies practical electrical parts for working trailers and towing setups, so you can match protection gear with the rest of the wiring hardware used on the job.

See more circuit and wiring parts in our Electrical category