NZMH9-250/ZM9A-100-CNA Eaton Molded Case Circuit Breaker

The NZMH9-250/ZM9A-100-CNA is a 3-pole molded case circuit breaker rated at 250A. It uses an inverse time thermal-magnetic trip mechanism with a fixed 100A thermal trip and a standard adjustable magnetic trip range of 1000–2000A. Interrupting capacity is 200kA at 240V AC and 85kA at 480V AC. The CNA suffix indicates configuration and certification for North American regulatory requirements. This device is designed for use in industrial power distribution systems where specified short-circuit and voltage ratings apply.