The LC1K1210U72 is a TeSys K 3-pole contactor from Schneider Electric, rated 12 A in AC-3 duty at ≤440 V, with a 230…240 V AC coil. It carries one normally open auxiliary contact and is designed for motor switching in control panels — the AC-3 utilisation category means it handles starting and stopping of squirrel-cage motors under full load. The built-in bidirectional peak-limiting diode suppressor on the coil reduces back-EMF, so the same suppression circuit works regardless of wiring polarity.
Motor power and ratings
Motor power capability varies by line voltage: 3 kW at 220…230 V AC, 5.5 kW at 380…415 V AC, 4 kW at 480 V AC, and 4 kW at 500…600 V AC or 660…690 V AC. The 1.3 W heat dissipation is modest — no forced cooling needed in a standard IP2X enclosure. Short-time withstand current (Icw) for the power circuit is 115 A for 1 s, dropping to 55 A for 1 minute, which gives some headroom for brief overloads during motor start.