Three-element thermal overload relay offering complete motor protection. It is designed to snap directly onto compatible SC-NEXT Frame 18 contactors for a clean, integrated motor starter assembly. No additional mounting hardware required. An integrated open-phase detector (3E function) guards against the three most common causes of motor failure: overload, locked-rotor current, and single-phasing. That last one matters. Phase-loss faults are exactly the kind of condition a standard two-element relay won’t catch, and the TR18XK won’t miss it. Three-element sensing ensures balanced monitoring across all phases, and manual reset keeps post-trip control firmly in the operator’s hands. The relay is available across a wide range of current settings to match your specific motor load, and it pairs with any SC-NEXT Frame 18 contactor to deliver a fully certified motor starter solution compliant with IEC 60947-4-1 and JIS C 8201-4-1.
