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

The NZMH9-250/ZM9A-250-CNA is a 3-pole molded case circuit breaker rated at 250A with inverse time thermal-magnetic tripping. It features a fixed thermal trip setting of 250A and an adjustable magnetic trip range from 1600A to 2400A. Interrupting capacity is 200kA at 240V AC and 85kA at 480V AC. The CNA designation indicates configuration and certification for North American compliance requirements. This device operates as a thermal-magnetic breaker without electronic trip units or external accessories. It belongs to the NZMH9 and ZM9A series, sharing identical electrical ratings and mechanical construction across both model designations.