Klockner Moeller ZB12-4 Molded Case Circuit Breaker

Moeller's ZB12-4 thermal overload relay is a motor-protection device that mounts directly to Moeller/Eaton contactors to guard single-motor loads against overload. It provides adjustable protection from 2.4 to 4 A (Ir = 2.4–4 A) and includes one normally open and one normally closed auxiliary contact for signaling trip status, with a voltage rating up to 600 VAC. The ZB12-4 is part of the ZB12 family and is designed for direct mounting on compatible Moeller contactors; it carries IP20 protection and is cataloged by Eaton as XTOB004BC1. This compact overload relay is commonly used in industrial motor circuits where precise current-based protection and straightforward status indication are required.