Allen-Bradley 1492-SP3C040 Fiber Optic Sensor

The Allen-Bradley 1492-SP3C040 is a three-pole supplementary protector (MCB) in the 1492 family, rated for 4 A and configured for three‑phase protection. It is designed to interrupt overcurrent on multi‑wire circuits in industrial control panels, providing circuit protection with a curve C trip characteristic for typical overload and short‑circuit conditions. The 1492-SP3C040 family member is commonly used in control power circuits and feeders where compact, molded‑case protection is required, and an accompanying neutral version exists as 1492‑SP3C040‑N for 3‑pole plus neutral installations. This device supports UL/CSA ratings of up to 480Y/277 VAC for three‑pole configurations, with nominal voltage and terminal arrangements that fit standard 1492 mounting schemes. With its rugged molded‑case construction and standardized 3‑pole configuration, the 1492‑SP3C040 provides predictable protection aligned with industrial safety practices and is typically deployed in electrical distribution panels, machine control, and automation cabinets where selective, reliable overcurrent protection is essential.