Eaton PKZM0-1-T Motor Protection Circuit Breaker, 0.63-1 A, 3-Pole, 690 V AC

Motor protection is critical in industrial environments where overloads and short circuits can cause costly downtime or equipment damage. The Eaton PKZM0-1-T is a 3-pole motor protection circuit breaker with a thermal-magnetic trip unit, offering reliable protection for motors with rated currents from 0.63 to 1 A. Its compact design and high breaking capacity make it suitable for a wide range of applications, from machine tools to conveyor systems.

Who is it for

This device is intended for electrical engineers, panel builders, and maintenance technicians who need dependable motor protection in industrial control panels. It is ideal for protecting small motors, transformers, and other loads where precise overload and short-circuit protection is required.

Main features

• Thermal-magnetic trip unit with adjustable overload release (0.63–1 A) and fixed short-circuit release (approx. 15.5 x Iu)
• High rated operational voltage of 690 V AC and insulation voltage of 690 V
• Rated short-circuit breaking capacity of 150 kA at 400 V, ensuring safety even in high-fault-current installations
• Compact 45 mm width, DIN rail or screw mounting, and screw terminals for easy installation
• IP20 protection, suitable for use in enclosed control panels
• Complies with IEC/EN 60947-4-1 and VDE 0660 standards; Type 2 coordination for short-circuit protection

Specifications

• Rated current range: 0.63–1 A
• Number of poles: 3
• Rated operational voltage (Ue): 690 V AC
• Rated insulation voltage (Ui): 690 V
• Rated impulse withstand voltage (Uimp): 6 kV
• Short-circuit breaking capacity (Icu) at 400 V: 150 kA
• Overload release setting range: 0.63–1 A
• Short-circuit release: fixed, approx. 15.5 x Iu
• Tripping characteristic: thermal-magnetic
• Mounting type: DIN rail (35 mm) or screw mounting
• Connection type: screw terminals
• Degree of protection: IP20
• Ambient operating temperature: -25 to +55 °C
• Standards: IEC/EN 60947-4-1, VDE 0660
• Actuator type: rotary knob
• Power loss per pole: 0.8 W at 1 A
• Terminal capacity: 1 x (1-6 mm²) solid or stranded; 2 x (1-2.5 mm²)
• Short-circuit protection coordination: Type 2 (according to IEC/EN 60947-4-1)

Tips

Ensure the motor's full-load current falls within the adjustable range of 0.63–1 A. For optimal protection, set the overload release to the motor's rated current. Always install in an enclosure with at least IP20 protection. Use appropriate screwdrivers for terminal tightening to avoid damage.