Bulletin 140U Motor Protectors

The Allen-Bradley Bulletin 140U Motor Protectors family encompasses manual motor protectors and their associated accessories designed for motor branch-circuit protection in industrial control panels. Within the catalog numbering convention, the prefix 140U identifies the Bulletin 140U platform, while the suffix characters indicate the specific accessory type and configuration — for example, HM4 denotes a medium operating handle, and the trailing letter (E in 140U-HM4E) distinguishes color or finish variants such as red/yellow versus standard black. The rotary door handles in this family, including the 140U-PB (black, standard with trip indication) and 140U-PY (red/yellow, standard with trip indication), mount to panel doors to allow external operation and provide visual trip status without opening the enclosure. The 140U-HM4 and 140U-HM4E are medium operating handles intended for H-frame circuit breaker configurations, differentiated by handle color. These accessories are engineered to integrate directly with compatible 140U motor protector bodies, supporting safe and ergonomic panel operation in demanding automation environments.