Eaton PKZM0-25-SPI3 Motor Protection Circuit Breaker, 25A, 3-Pole, Thermal-Magnetic 199202

In industrial control panels and motor control centers, the Eaton PKZM0-25-SPI3 motor protection circuit breaker safeguards three-phase motors against overload and short-circuit faults. With a rated operational current of 25 A and an adjustable overload release range from 20 to 25 A, it is suited for protecting motors up to approximately 11 kW at 400 V AC. The thermal-magnetic release principle ensures reliable disconnection under fault conditions, while the 50 kA short-circuit breaking capacity at 400 V provides robust protection in demanding installations. The device is designed for DIN rail or screw mounting and features screw terminals for secure wiring. Its IP20 degree of protection makes it suitable for use in enclosed electrical enclosures. Compliant with IEC/EN 60947-4-1 and VDE 0660, this breaker is a dependable choice for motor protection in industrial automation, HVAC, and pump applications.

Key specifications

• Rated operational current: 25 A
• Overload release setting range: 20 - 25 A
• Short-circuit breaking capacity (Icu) at 400 V: 50 kA
• Number of poles: 3
• Rated operational voltage: 690 V AC
• Trip class: Class 10
• Mounting type: DIN rail / Screw mounting
• Connection type: Screw terminals
• Degree of protection: IP20
• Thermal overload protection: Yes, adjustable
• Short-circuit protection: Yes, magnetic
• Rated impulse withstand voltage: 6 kV
• Rated frequency: 50/60 Hz
• Ambient operating temperature: -25 to +55 °C
• Switching capacity category: AC-3
• Release principle: Thermal-magnetic
• Standards: IEC/EN 60947-4-1, VDE 0660

Why choose it

The PKZM0-25-SPI3 offers precise motor protection with an adjustable thermal release, ensuring motors are protected against overloads while avoiding nuisance tripping. Its high short-circuit breaking capacity and robust construction make it suitable for demanding industrial environments. The compact design and flexible mounting options simplify installation in control panels.

Ideal use cases

• Protection of three-phase motors in industrial machinery
• HVAC systems, pumps, and fans
• Motor control centers and distribution boards
• Applications requiring compliance with international standards

Good to know

The device does not include integrated auxiliary contacts, but add-on auxiliary contact modules can be mounted for signaling and control functions. The breaker is designed for use in enclosed electrical enclosures due to its IP20 rating. Always ensure proper sizing based on motor full-load current and application requirements.