ABB S4H3P100A Low Voltage Molded Case Circuit Breaker

ABB S4H3P100A is a 100 A, three‑pole molded‑case circuit breaker (MCCB) from ABB’s S4H/SACE Isomax family, designed for protection of 3‑phase power systems up to 600 V AC. It ships with an integral shunt trip and an auxiliary contact for remote tripping and status signaling in automation and safety systems, and it is UL‑listed for industrial use. The device is specified for 22 kA short‑circuit current at 600 V, with other catalog entries showing ratings up to 65 kA at lower voltages such as 415–480 V depending on configuration, making it suitable for feeder protection in distribution panels and motor control applications where rapid, reliable disconnection is required. It provides thermal‑magnetic protection with long‑time and instantaneous trip features and uses load‑side lug terminations compatible with common ABB panel hardware, offering a compact protection solution for 3‑phase feeders and machinery in industrial facilities.