Moeller ZB12-12 Overload Relay

The Moeller ZB12-12 Thermal Overload Relay is a 3‑pole electromechanical motor protection device that provides overload and phase‑loss protection for three‑phase motors in industrial control panels and automation systems. It offers an adjustable current range of 9 to 12 A, is rated up to 690 VAC at 50/60 Hz, and is housed to IP20 with screw terminals for reliability in industrial environments. The relay trips at Class 10A, includes 1 normally open and 1 normally closed auxiliary contact, and supports manual or automatic reset. Mounting is via direct mounting to Moeller DILM and DIL series contactors or as a standalone protective relay. The ZB12‑12 is part of the ZB12 family (MPN ZB12‑12) from Moeller (Eaton) and complies with IEC 60947-4-1, UL 508, CSA C22.2, with certifications CE, UL Listed, CSA Certified. Operating temperature range is -25°C to +55°C. Common applications include motor control centers, conveyors, pumps, compressors, fans, HVAC equipment, and manufacturing machinery requiring reliable overload and phase‑loss protection. Common replacements include Eaton ZB12‑16, XTOB012BC1, and ABB TA25‑DU12.