EATON PKZM0-4 Motor Protection Circuit Breaker, 2.5-4 A, 3-Pole, Rotary Knob

Motor protection circuit breaker from the PKZM0 series, engineered to deliver dependable protection for motors up to 1.5 kW at 400 V. Its thermal-magnetic trip unit reliably disconnects on overload and short circuit, while the rotary knob provides clear, front-facing control.

Advantages

The PKZM0-4 combines robust construction with precise protection. The adjustable overload range of 2.5–4 A allows fine-tuning to the motor's rated current, reducing nuisance trips. Screw terminals ensure secure wiring, and DIN rail mounting simplifies installation in distribution boards and control panels.

Suitable for

• Three-phase motors up to 1.5 kW (AC-3, 400 V)
• Industrial control panels and machine building
• Pump, fan, and conveyor applications
• HVAC systems and compressors

Key specifications

• Rated operational current: 4 A (max. setting)
• Overload release setting range: 2.5–4 A
• Number of poles: 3
• Rated operational voltage: 690 V AC
• Short-circuit breaking capacity: 50 kA at 400 V
• Actuation type: rotary knob
• Mounting: DIN rail
• Degree of protection: IP20
• Terminal type: screw
• Standards: IEC/EN 60947-4-1, VDE 0660

Recommendations

For reliable motor protection in industrial environments, the EATON PKZM0-4 offers a proven solution with easy adjustment and high breaking capacity. Pair with a contactor for complete motor starters.