Allen-Bradley 1492-SPM1C040 Miniature Circuit Breaker

The Allen-Bradley 1492-SPM1C040 is a 1-pole supplementary miniature circuit breaker from the 1492-SPM family, designed for control circuits in industrial panels. It is rated for 4 A and 277 V AC, with a C-type (trip curve C) characteristic for overload and short-circuit protection. The device is UL 1077 listed with a 10 kA interrupting capacity, making it suitable for reliable protection of small control circuits in compliant systems. This 1492-SPM product line is part of Allen-Bradley’s Bulletin 1492 supplementary protectors and is used where compact, plug-in protection is required for relays and other control equipment.