Eaton NZMN1-A63 3-Pole Circuit Breaker 63A 690V AC 50kA 259083

Industrial electricians and panel builders use the Eaton NZMN1-A63 circuit breaker to protect three-phase motor and distribution circuits up to 63 A. This fixed-installation breaker with screw terminals is suitable for cable lugs and provides reliable overload and short-circuit protection in low-voltage switchgear.

Key specifications

• Number of poles: 3
• Rated current (In): 63 A
• Rated operational voltage (Ue): up to 690 V AC
• Rated insulation voltage (Ui): 800 V
• Rated impulse withstand voltage (Uimp): 8 kV
• Short-circuit breaking capacity (Icu) at 400 V AC: 50 kA
• Short-circuit breaking capacity (Icu) at 690 V AC: 10 kA
• Short-circuit service breaking capacity (Ics) at 400 V AC: 50 kA
• Release type: thermal-magnetic, fixed
• Overload release setting (Ir): 63 A
• Short-circuit release setting (Ii): 630 A (10 x In)
• Frame size: NZM1
• Mounting type: fixed installation
• Connection type: screw terminals (suitable for cable lugs)
• Protection function: overload and short-circuit protection
• Standard compliance: IEC/EN 60947-2
• Degree of protection (front): IP20 (with terminal covers)
• Ambient operating temperature: -25 to +70 °C

Why choose it

The NZMN1-A63 offers high breaking capacity and thermal-magnetic protection in a compact frame, making it a dependable choice for demanding industrial applications. Its screw terminals accept cable lugs for secure, low-maintenance connections.

Ideal use cases

• Motor protection in industrial control panels
• Distribution board protection in commercial buildings
• Protection of three-phase circuits with rated currents up to 63 A

Good to know

The breaker is designed for fixed installation and complies with IEC/EN 60947-2. Terminal covers are required to achieve the stated IP20 front protection.