PKZ2/ZM-25/S-SP Eaton Motor Protective Circuit Breaker

The PKZ2/ZM-25/S-SP is a 3-pole, 25 A motor protective circuit breaker configured as a manual motor starter. It integrates overload and magnetic trip protection in a single self-protected unit, certified to UL 508 and CSA 22.2 as a Type E combination motor controller. The assembly includes the PKZ2/S-SP base module with contactor, ZM-25-PKZ2 overload relay (adjustable thermal range: 16–25 A), and C-PKZ2 DIN rail mounting adapter. Magnetic trip adjustment spans 200–350 A. Motor rating support is up to 7.5 HP at 230 V and 20 HP at 460 V. Phase-loss protection, auxiliary contacts, and a plug-in trip module are included. No external overcurrent protection is required.