PKZ2/ZMR-40/S Eaton Motor Protective Circuit Breaker

The PKZ2/ZMR-40/S is a 40A, 3-pole motor protective circuit breaker in the ZMR-S series. It functions as a self-protected manual motor starter, combining the PKZ2 basic module, ZMR-40-PKZ2 overload relay (adjustable thermal trip range: 32–40 A), S-PKZ2 high-capacity magnetic contactor, and C-PKZ2 DIN rail mount. Magnetic trip occurs between 350 A and 500 A. It supports motors up to 15 HP at 230 V and 30 HP at 460 V. The device is UL listed and CSA certified. It meets NEC 430-53(c) and CEC Rule 28-206 for group installations and is recognized as an HP-rated motor controller. Its integrated design eliminates the need for separate motor branch overcurrent protection.