ABB ST201M-Z4

The ABB ST201M-Z4 is a single-pole miniature circuit breaker designed to handle up to 4 amps at 480Y/277V AC. This model features a Z-Curve trip characteristic, making it well-suited for protecting sensitive electronic equipment from short circuits and overloads. With a 10 kA interrupting capacity, it offers reliable fault protection in compact installations. Part of the ST200M series of supplemental protectors, this breaker meets UL 1077 and CSA 22.2 standards, ensuring safety and performance. Distributed by BSP Automation, the ST201M-Z4 is a solid choice when you need dependable, space-saving circuit protection—basically, a “little powerhouse” in your control panel.