EATON PKZM0-10 Motor Protection Circuit Breaker, 3-Pole, 6.3-10 A, 4 kW, Rotary Knob

In industrial control panels and motor control centers, protecting three-phase motors from overload and short circuits is critical. The EATON PKZM0-10 motor protection circuit breaker is a compact, 3-pole device rated for currents from 6.3 A to 10 A, making it ideal for motors up to 4 kW at 400 V AC. Its rotary knob actuation provides clear ON/OFF indication and easy manual operation, while the thermomagnetic trip mechanism ensures reliable protection according to Class 10 characteristics.

Key specifications

• Rated operational current: 10 A (adjustable from 6.3 A to 10 A)
• Rated operational voltage: 690 V AC
• Rated operational power at 400 V AC (AC-3): 4 kW
• Short-circuit breaking capacity (Icu at 400 V): 50 kA
• Number of poles: 3
• Actuation type: Rotary knob
• Tripping characteristic: Thermomagnetic, Class 10
• Mounting: DIN rail or screw mounting
• Degree of protection: IP20
• Standards: IEC/EN 60947-4-1
• Rated impulse withstand voltage (Uimp): 6 kV
• Frequency: 50/60 Hz
• Terminal type: Screw terminals
• Ambient operating temperature: -25 °C to +55 °C
• Mechanical life: 100,000 operations
• Electrical life: 100,000 operations

Why choose it

The PKZM0-10 offers dependable motor protection in a compact 45 mm width, saving valuable panel space. Its adjustable overload setting allows fine-tuning to the motor's full-load current, preventing nuisance tripping while ensuring fast response to overloads. The high short-circuit breaking capacity of 50 kA enhances system safety, and the rotary knob provides a clear visual indication of the breaker's status. With a wide operating temperature range and long mechanical and electrical life, it is built for demanding industrial environments.

Ideal use cases

• Protection of three-phase asynchronous motors up to 4 kW in industrial machinery
• Motor control centers and distribution boards requiring compact, DIN-rail-mounted protection
• Pumps, fans, conveyors, and other motor-driven equipment in manufacturing plants
• Applications where manual motor starting and stopping via rotary knob is preferred

Good to know

The PKZM0-10 is part of EATON's PKZM0 series, known for its reliability and ease of installation. It is suitable for use in circuits up to 690 V AC and complies with international standards, ensuring compatibility with global installations. The screw terminals accommodate a range of conductor sizes, and the device can be mounted on standard 35 mm DIN rails or screwed directly to a panel. For auxiliary contacts or signaling, optional accessories are available (not included).