Eaton PKZM4-50 Motor Protection Circuit Breaker, 3-Pole, 50 A, 40-50 A Overload, Screw Terminals, DIN Rail 222355

The Eaton PKZM4-50 delivers a 50 kA short-circuit breaking capacity at 400 V, making it a robust motor protection circuit breaker for demanding industrial applications.

Overview

The Eaton PKZM4-50 is a 3-pole motor protection circuit breaker with thermal-magnetic trip unit. It offers an adjustable overload release range of 40 to 50 A and a fixed magnetic short-circuit release at 14 times the rated current. The device is suitable for rated operational voltages up to 690 V AC and features screw terminals with a capacity of 1 x 50 mm² or 2 x 16 mm² flexible conductors. It mounts on DIN rail (EN 60715) or by screw fixing and has an IP20 protection degree for terminals.

What stands out

• High short-circuit breaking capacity: 50 kA at 400 V
• Wide adjustable overload range: 40 to 50 A
• Thermal-magnetic trip for reliable motor protection
• Rotary knob control for easy adjustment
• Compact design for DIN rail mounting

Technical details

• Number of poles: 3
• Rated operational current (Ie): 50 A
• Rated operational voltage (Ue): up to 690 V AC
• Rated insulation voltage (Ui): 690 V
• Rated impulse withstand voltage (Uimp): 6 kV
• Short-circuit breaking capacity (Icu) at 400 V: 50 kA
• Short-circuit breaking capacity (Icu) at 690 V: 10 kA
• Tripping characteristic: thermal-magnetic
• Short-circuit release (magnetic): fixed at 14 x Ie (approx. 700 A)
• Connection type: screw terminals
• Terminal capacity: 1 x 50 mm² or 2 x 16 mm² (flexible)
• Protection degree: IP20 (terminals)
• Ambient operating temperature: -25 to +55 °C
• Rated frequency: 50/60 Hz
• Mounting type: DIN rail (EN 60715) / screw fixing
• Control element: rotary knob

Our verdict

The Eaton PKZM4-50 is a dependable motor protection circuit breaker for industrial motor control, offering high breaking capacity and precise overload adjustment.