Eaton Moeller ZM-40-PKZ2 PKZ2 Motor Protective Circuit Breaker 0.6-40A DIN Rail

Eaton Moeller ZM-40-PKZ2 PKZ2 Motor Protective Circuit Breaker 0.6-40A DIN Rail

The Eaton Moeller ZM-40-PKZ2 is a PKZ2-series motor protective circuit breaker (motor protection switch) with an adjustable current range of 0.6 to 40 amps. It combines thermal overload protection and magnetic short-circuit protection in a single DIN rail-mounted device, eliminating the need for a separate overload relay in many motor starter applications. The front panel features a rotary ON/OFF handle, a red magnetic trip indicator (I>), a yellow adjustable thermal dial, and a Test button for manual trip verification.

Specifications & What's Included

• Model: ZM-40-PKZ2 (PKZ2 series)
• Type: Motor Protective Circuit Breaker (Motor Protection Switch)
• Adjustable Current Range: 0.6–40 A
• Impulse Voltage (U_imp): 6,000 V
• Rated Voltage: Up to 690V AC
• Frequency: 50/60 Hz
• Breaking Capacity: Per IEC/EN 60947 table (varies by voltage — see rating plate)
• Trip Functions: Thermal overload (adjustable) + magnetic short-circuit protection
• Mounting: DIN rail
• Phase: Three-phase
• Standards: IEC/EN 60947, VDE 0660, IEC 445, EN 50005
• Certifications: CE, CCC, ATEX II(2)G (PTB 02 ATEX 3152)
• Front panel controls: Rotary ON/OFF handle, red overcurrent indicator (I>), yellow thermal adjustment dial, Test button
• Includes: Circuit breaker unit only — no additional accessories

Applications

The Moeller PKZ2 series motor protective circuit breakers are a well-established product line used in industrial motor control centers, control panels, and machine tool enclosures. The ZM-40-PKZ2 is designed to protect three-phase motors up to approximately 15–18.5 kW (depending on voltage and application) from overload and short-circuit conditions. These devices are commonly used in manufacturing facilities, pump stations, conveyor systems, HVAC equipment, and other motor-driven industrial machinery where reliable motor protection is required. The PKZ2 series is also compatible with a range of Moeller/Eaton accessories including auxiliary contacts, shunt releases, and bus bars, making them a flexible building block in motor starter assemblies. ATEX certification makes this unit suitable for use in Zone 2 hazardous environments involving gas or vapor. The PKZ2 platform has been produced for decades and remains a current, widely-supported product line under the Eaton brand following their acquisition of Moeller.