NZMN1-4-A40 Eaton Molded Case Circuit Breaker

The Eaton/Moeller NZMN1-4-A40 is a thermomagnetic molded case circuit breaker designed for dependable performance in industrial applications. With a rated current of 40 A across four poles, it provides adjustable overload protection from 32–40 A and short-circuit protection from 320–400 A (8–10 × In). This breaker operates at voltages up to 690 V and offers high breaking capacities of 85 kA at 240 V, 50 kA at 400/415 V, and 35 kA at 440 V. Featuring a rocker lever operator and fixed installation with box terminals, it allows for optional tunnel or rear connections. The NZMN1-4-A40 provides basic IP20 protection, which can be upgraded to IP66 with accessories, and meets IEC/EN 60947 standards for safety and durability. It is resistant to mechanical and electrical operations, withstanding up to 20,000 mechanical and 10,000 electrical cycles, and operates reliably within a temperature range of −25 °C to +70 °C.