Eaton NZMB1-M80 3-Pole Motor Protection Circuit Breaker 80A 265713

Industrial electricians and panel builders use the Eaton NZMB1-M80 to protect three-phase motors up to 80 A. This 3-pole motor protection circuit breaker mounts on a DIN rail or with screws in motor control centers and distribution boards.

Key specifications

• 3-pole design for three-phase motor protection
• Rated operational current: 80 A
• Rated operational voltage: 690 V AC
• Short-circuit breaking capacity (Icu/Ics): 50 kA at 400 V
• Overload release setting range: 64–80 A
• Short-circuit release fixed at 10 x Ie (800 A)
• Thermal-magnetic tripping characteristic
• Screw terminals for secure conductor connection
• Degree of protection: IP20 (front side with terminals)
• Rated impulse withstand voltage: 6 kV
• Operating frequency: 50/60 Hz
• Ambient operating temperature: -25 °C to +70 °C

Why choose it

The NZMB1-M80 combines motor overload and short-circuit protection in one compact device. Its adjustable thermal release allows precise matching to motor full-load current, preventing nuisance tripping while ensuring reliable protection.

Ideal use cases

• Motor protection in industrial control panels
• Protection of pumps, fans, and compressors
• Replacement for existing NZMB1-M80 breakers

Good to know

Complies with IEC/EN 60947-2 and VDE 0660 for motor protection circuit breakers. Screw fixing ensures stable mounting in high-vibration environments.