The LP1K12107JD is a three-pole contactor from the TeSys K series, rated 12 A in AC-3 duty at ≤440 V, with a 12 V DC coil and one normally open auxiliary contact. It is listed for utilisation categories AC-1, AC-3, and AC-4, meaning it handles resistive heating loads, standard squirrel-cage motor starting, and plugging/inching duty respectively.
This part is officially obsolete per the manufacturer lifecycle record.
The 20 A AC-1 rating is the thermal current; the 12 A AC-3 rating governs motor switching. Coil hold-in power is 3 W at 20 °C, which matters for control-transformer sizing in a panel with multiple contactors.