Altech 3CU3R Circuit Breaker

Altech 3CU3R is a UL 1077‑recognized three‑pole miniature circuit breaker (supplementary protector) rated at 3 A, designed for equipment protection in AC systems up to 480Y/277 VAC. This 3P unit uses a C‑curve trip characteristic, providing reliable overcurrent protection for control circuits and other equipment loads while tolerating normal inrush without nuisance tripping. The “R” suffix denotes a ring‑tongue terminal variant (the standard “U” version can be swapped to “R” for ring terminals, per Altech’s labeling guidance). As part of Altech’s UR/UL 1077 family, the 3CU3R is intended to interrupt current in equipment enclosures and industrial assemblies where three‑phase protection is required. Its compact molded‑case design fits standard control panels with 480Y/277 VAC service, delivering a precise 3 A rating and a dependable disconnection path in fault conditions. This model is appropriate for auxiliary loads and small control circuits within automation setups, where UL 1077 recognition ensures compatibility for supplementary protection in equipment applications.