Manual Reset Circuit Breaker (50A, 12-32V DC) protects a single vehicle electrical circuit by interrupting current during overload or fault conditions and providing manual isolation when required. It is used in vehicle electrical systems supplying accessory circuits on traffic control vehicles, civil fleet, utility vehicles and service bodies where a compact, resettable protection device is required.

This breaker is installed inline on the positive supply cable between the battery and the protected accessory or distribution circuit. It is surface mounted to panels, trays, canopies or electrical mounting boards and connects via #10-32 (5-6mm) threaded studs, allowing ring terminal cable connections suited to 6mm or 1/4 inch lugs. The compact footprint allows installation in confined spaces where larger breakers are not suitable.

During normal operation, the breaker maintains circuit continuity up to its 50A rating across 12–32V DC systems. During an overload or fault condition, it trips and opens the circuit. Power remains interrupted until the fault is rectified and the breaker is manually reset, restoring circuit operation without replacing a fuse. The switchable design can also be used for manual circuit isolation where the system layout supports that use.

The housing is constructed from UL94V-0 rated thermal plastic and is designed for vehicle environments exposed to vibration, dust and moisture rated for operation from -40°C to +85°C. With an IP66 rating and protective stud insulators, the circuit breaker supports installation in exposed service areas, trays and electrical compartments where reliable sealing and connection protection are required.

This OEX 50A manual reset circuit breaker is compatible with 12V and 24V vehicle systems and is used for single-circuit protection in auxiliary power distribution, lighting circuits, warning equipment, compressors and accessory feeds where a compact breaker with smaller terminal size is required as part of the electrical layout. Compatibility should be confirmed against the circuit requirements, accessory load, mounting arrangement, terminal hardware and manufacturer specifications before use.

In real vehicle installations, this type of breaker is commonly used on traffic control vehicles, civil fleet, utility vehicles, auxiliary power systems and service bodies where space is limited and smaller cable sizes are used, including circuits supplying beacons, work lights, radios, charging outlets and low to medium load accessories requiring resettable protection.

Manual Reset Circuit Breaker FAQs

What voltage systems is this breaker specified for?

This breaker is specified for 12-32V DC vehicle electrical systems. System compatibility should be confirmed against the supplied specifications and the vehicle electrical setup.

What does manual reset mean?

Manual reset means the breaker must be reset by hand after it trips and the fault condition has been rectified.

Can this breaker be used for manual isolation?

The Type 3 switchable design can provide manual circuit isolation where the electrical layout and system requirements support that use.

What terminals does this breaker use?

This breaker uses #10-32 threaded studs and suits compatible ring terminals with 6mm or 1/4 inch lug connections.

Is this circuit breaker IP rated?

Yes. The supplied ingress protection rating is IP66. Product suitability should still be assessed against the mounting location, operating environment and manufacturer specifications.