Challenger CJ3175 U Molded Case Circuit Breaker

Challenger CJ3175 U molded case circuit breaker is a 3‑pole, 175 A protection device rated for up to 600 V AC, designed in Challenger’s CJ Series with a J‑frame and bolt‑on mounting. It employs a thermal‑magnetic trip mechanism and carries a 25 kA interrupt rating at 480 V, making it suitable for reliable short‑circuit protection in industrial and commercial electrical distribution systems. The CJ3175 U supports standard line and load terminations and is UL listed, aligning with common 3‑phase panel and distribution board applications. Typical uses include protecting feeders and motors in manufacturing lines, equipment rooms, and power panels where precise overload and short‑circuit protection is required at voltages up to 600 V. As part of the CJ family, CJ3175 U shares the CJ Series’ core electrical characteristics and mounting compatibility, so you should verify lug/bus configurations and fit with your existing enclosure before replacement.