EATON PKZM0-0.25 Motor Protection Circuit Breaker, 0.25A, 3-Pole, Rotary Knob, 0.06kW at 400V 072731

In industrial control panels and motor control centers, protecting small three-phase motors from overload and short-circuit is critical. The EATON PKZM0-0.25 motor protection circuit breaker is engineered for exactly that task. With a rated operational current of 0.25 A and an adjustable overload release from 0.16 to 0.25 A, it safeguards motors up to 0.06 kW at 400 V AC-3. The rotary knob actuation ensures clear ON/OFF indication and easy manual operation, while screw terminals provide secure wiring. This 3-pole device is suitable for DIN rail or screw mounting and complies with IEC/EN 60947-4-1.

Key specifications

• Rated operational current: 0.25 A
• Overload release setting range: 0.16 – 0.25 A
• Rated operational power (AC-3, 400 V): 0.06 kW
• Number of poles: 3
• Actuation type: Rotary knob
• Mounting: DIN rail or screw mounting
• Rated insulation voltage (Ui): 690 V
• Rated impulse withstand voltage (Uimp): 6 kV
• Short-circuit breaking capacity (Icu at 400 V): 150 kA
• Degree of protection: IP20
• Connection type: Screw terminals
• Standards: IEC/EN 60947-4-1
• Ambient operating temperature: -25 to +55 °C
• Thermal overload release: Yes
• Magnetic short-circuit release: Yes

Why choose it

The PKZM0-0.25 offers reliable protection for small motors, preventing damage from overloads and short circuits. Its compact design saves space in control cabinets, and the rotary knob provides clear status indication. The wide adjustment range allows precise matching to motor full-load current, reducing nuisance tripping. With a high short-circuit breaking capacity of 150 kA, it ensures safety even in systems with high prospective fault currents.

Ideal use cases

• Protection of small three-phase motors in industrial machinery
• Motor control centers and distribution boards
• HVAC systems, pumps, and fans
• Conveyor systems and packaging machines
• Any application requiring motor protection up to 0.06 kW at 400 V

Good to know

The PKZM0-0.25 is part of Eaton's proven PKZM0 series, known for reliability and ease of installation. It can be combined with auxiliary contacts and other accessories for enhanced functionality. The device is maintenance-free and designed for long service life. Always ensure proper sizing according to motor full-load current and local regulations.