EATON PKZM0-0.63 Motor Protection Circuit Breaker, 0.63 A, 3-Pole, Rotary Knob, 0.12 kW at 400 V 072733

The EATON PKZM0-0.63 motor protection circuit breaker stands out for its compact frame and precise overload protection, making it a dependable choice for safeguarding small motors up to 0.12 kW at 400 V. Unlike generic breakers, this unit combines thermal and magnetic trips in a single DIN-rail-mountable device, ensuring both overload and short-circuit protection without the need for additional components. Its rotary knob allows straightforward current adjustment from 0.4 A to 0.63 A, while the screw terminals provide secure wiring for industrial control panels.

Highlights

• Rated operational current of 0.63 A with adjustable overload release from 0.4 A to 0.63 A
• 3-pole design suitable for three-phase motor circuits
• Rotary knob actuation for easy setting and clear status indication
• High short-circuit breaking capacity of 150 kA at 400 V AC
• Compact PKZM0 frame fits standard DIN rails and screw mounting
• Complies with IEC/EN 60947-4-1, trip class 10

In daily use

Installed on a DIN rail or screwed directly into a panel, the PKZM0-0.63 provides reliable protection for small motors in pumps, fans, conveyors, and machine tools. The thermal release responds to sustained overloads, while the fixed magnetic release trips instantly at approximately 14 times the rated current, preventing damage from short circuits. The rotary knob can be locked in the OFF position for maintenance safety, and the IP20 housing protects against accidental contact with live parts. With an ambient operating range from -25 °C to +55 °C, it performs consistently in demanding environments.

Full specifications

• Rated operational current (Ie): 0.63 A
• Overload release setting range: 0.4 - 0.63 A
• Rated operational voltage (Ue): 690 V AC
• Rated power at 400 V: 0.12 kW
• Number of poles: 3
• Actuation type: rotary knob
• Mounting type: DIN rail / screw mounting
• Rated short-circuit breaking capacity (Icu at 400 V): 150 kA
• Rated impulse withstand voltage (Uimp): 6 kV
• Degree of protection: IP20
• Trip class: 10
• Standards: IEC/EN 60947-4-1
• Ambient operating temperature: -25 to +55 °C
• Connection type: screw terminals
• Short-circuit release: fixed, approx. 14 x Ie
• Frame size: PKZM0
• Thermal overload release: yes
• Magnetic short-circuit release: yes

Final note

The EATON PKZM0-0.63 is a proven solution for motor protection in industrial applications, offering precise adjustment, high breaking capacity, and easy installation in a compact package.