EATON PKZM01-4 Motor Protection Circuit Breaker 4A 3-Pole Push Button 278482

Motor protection circuit breaker with thermal and magnetic trips, rated at 4 A for reliable protection of three-phase motors up to 1.5 kW at 400 V. The push button actuation provides simple manual on/off control, while the fixed short-circuit release reacts at approximately 56 A for rapid fault clearing.

Advantages

The PKZM01-4 combines overload and short-circuit protection in a compact 45 mm wide housing. Phase failure sensitivity prevents motor damage from single-phasing, and the screw terminals ensure secure wiring. Suitable for DIN rail or screw mounting, it integrates easily into motor control panels.

Suitable for

• Protecting three-phase motors up to 1.5 kW at 400 V
• Motor starters and control circuits requiring manual reset
• Industrial applications with ambient temperatures from -25 to +55 °C

Key specifications

• Rated operational current: 4 A
• Overload release setting range: 2.5 – 4 A
• Rated operational voltage: 690 V AC
• Number of poles: 3
• Short-circuit release: fixed, approx. 56 A
• Rated ultimate short-circuit breaking capacity at 400 V: 50 kA
• Mounting: DIN rail or screw
• Terminals: screw type

Recommendations

For optimal motor protection, set the overload release to the motor's full-load current within the 2.5–4 A range. Verify short-circuit coordination with upstream protective devices per IEC/EN 60947-4-1.