Eaton PKZM4-63 Motor Protection Circuit Breaker, 3-Pole, 40-63 A, 690 V AC 222413

The Eaton PKZM4-63 stands apart from typical motor protection breakers with its robust 63 A frame and precise thermal-magnetic tripping, engineered for demanding industrial motor control. Its adjustable overload release from 40 A to 63 A allows fine-tuning to the exact motor full-load current, while the fixed magnetic short-circuit release ensures rapid fault clearing.

Highlights

• Rated operational current: 63 A
• Adjustable overload release: 40 - 63 A
• 3-pole switching for three-phase motor protection
• High short-circuit breaking capacity: 50 kA at 400 V AC
• Thermal-magnetic tripping characteristic
• DIN rail or screw mounting for flexible installation

In daily use

The PKZM4-63 provides reliable protection for motors up to 63 A, preventing damage from overloads and short circuits. Its screw terminals accept large conductors (up to 50 mm² flexible), simplifying wiring in control panels. The IP20 protection degree suits it for enclosed installations, and the wide ambient temperature range from -25 °C to +55 °C ensures dependable operation in harsh environments.

Full specifications

• Rated operational current (Ie): 63 A
• Overload release setting range: 40 - 63 A
• Number of poles: 3
• Rated operational voltage (Ue): 690 V AC
• Rated impulse withstand voltage (Uimp): 6 kV
• Short-circuit breaking capacity (Icu) at 400 V: 50 kA
• Tripping characteristic: Thermal-magnetic
• Overload release type: Thermal, adjustable
• Short-circuit release type: Magnetic, fixed (approx. 14 x Ie)
• Mounting type: DIN rail (35 mm) / Screw mounting
• Connection type: Screw terminals
• Protection degree (IP): IP20
• Standard compliance: IEC/EN 60947-4-1
• Ambient operating temperature: -25 to +55 °C
• Terminal capacity (flexible): 1 x 50 mm² / 2 x 16 mm²
• Max switching frequency: 40 operations/hour
• Release class: Class 10

Final note

With its high breaking capacity and precise adjustable overload protection, the PKZM4-63 is a dependable choice for protecting motors in industrial applications.