Our motor protection circuit breakers provide both short-circuit and overload protection for individual motor loads and are available for a wide range of motor sizes and installation types. They can be combined with our NEMA and IEC contactors or solid-state motor controllers.
Motor Protection Circuit Breakers
140MT Motor Protection Circuit Breakers
Our Bulletin 140MT Motor Protection Circuit Breakers (MPCBs) provide cost-saving magnetic short-circuit and thermal overload protection up to 40A.
140MP Motor Protection Circuit Breakers
Our Bulletin 140MP Motor Protection Circuit Breakers (MPCBs) provide magnetic short-circuit and thermal overload protection up to 32 A, with an interrupting rating @400V of up to 100 kA. They are tested in combination with Allen‑Bradley Bulletin 100-C and 100-K contactors to create two-component motor starters.
140MG Motor Protection Circuit Breakers
Our Bulletin 140MG Motor Protection Circuit Breakers can provide a disconnecting means for motor branch circuit, branch-circuit and short-circuit magnetic protection, overload thermal protection, and manual switching. We offer devices rated from 25...150 A to meet your particular needs. Our factory-installed internal accessories make installation and wiring easy. In North America, electrical codes require that an individual Motor Branch Circuit be protected by a UL/CSA Listed Fuse, Circuit Breaker, or Self-protected Combination Motor Controller.