EATON PKZM0-1,6 Motor Protective Circuit Breaker 3-Pole 1-1.6A 0.55kW 400V Rotary Knob

Where many motor protection switches force a compromise between compact footprint and robust short-circuit performance, the EATON PKZM0-1,6 delivers both in a 45 mm wide DIN-rail housing. Its adjustable thermal release from 1 A to 1.6 A and fixed magnetic trip make it a precise guardian for small three-phase motors up to 0.55 kW at 400 V, while the rotary knob actuation remains easy to operate even with gloved hands.

Highlights

• Rated operational current 1.6 A with adjustable overload range 1–1.6 A
• High short-circuit breaking capacity of 150 kA at 400 V for demanding industrial networks
• 3-pole switching with phase-failure sensitivity as standard
• Rotary knob (Knebelbetätigung) for clear ON/OFF and trip indication
• Complies with IEC/EN 60947-4-1 and VDE 0660; trip class 10
• IP20 terminals; finger-safe design; optional enclosures for IP65

In daily use

Installed on a standard 35 mm DIN rail or screwed directly to a mounting plate, the PKZM0-1,6 protects motors against overload, phase loss, and short circuit. The transparent cover allows a quick visual check of the trip state, and the rotary knob can be padlocked in the OFF position for maintenance. Auxiliary contact modules and voltage releases can be clipped on without tools, expanding the breaker into a complete motor starter when combined with a DIL contactor.

Full specifications

• Product type: Motor protective circuit breaker
• Rated operational current Ie: 1.6 A
• Overload release setting range Ir: 1 – 1.6 A
• Rated operational voltage Ue: 690 V AC
• Rated operational power at 400 V: 0.55 kW
• Number of poles: 3
• Actuation type: Rotary knob
• Short-circuit breaking capacity Icu at 400 V: 150 kA
• Degree of protection: IP20 (terminals); IP65 with suitable enclosure
• Mounting: DIN rail (35 mm) or screw mounting
• Trip class: CLASS 10
• Standards: IEC/EN 60947-4-1, VDE 0660
• Thermal overload release: Yes
• Magnetic short-circuit release: Yes
• Auxiliary contacts: None (add-on modules available)
• Ambient operating temperature: -25 °C to +55 °C

Final note

For machine builders and panel shops, the PKZM0-1,6 offers a proven, type-tested solution that reduces wiring time and increases uptime — all in a compact, globally accepted format.