Mitsubishi MR-J3HC2S-SH-30M Thermal Overload Relay for TH-N Series

The Mitsubishi MR-J3HC2S-SH-30M (MR-J3HC2S-SH-30M) is a three-pole thermal overload relay designed for reliable motor protection in Mitsubishi Electric TH-N series installations and industrial automation systems. This protective relay safeguards electric motors against overcurrent conditions and phase failure by utilizing three bimetallic heating elements that respond to sustained thermal overloads. Featuring an adjustable tripping current range from 54 to 80 A, it enables precise calibration to match motor load requirements. The unit includes one normally open (1 NO) and one normally closed (1 NC) auxiliary contact for signaling and interlocking within motor starter circuits. Equipped with mechanical lug terminal connections, the relay ensures secure wiring for main power and control circuits. It serves as an equivalent replacement to the TH-N120KP67A configuration, delivering robust protection for three-phase induction motors, machinery drives, pumps, and industrial control cabinets. Designed to integrate seamlessly with magnetic contactors, this thermal overload relay prevents winding damage and enhances operational safety across industrial motor control applications.