The LC1K12105E7 is a Schneider TeSys K 3-pole contactor rated for 12 A in AC-3 and AC-3e utilisation categories at 440 V, with a 48 V AC coil. It carries one normally open instantaneous auxiliary contact and terminates via solder pins for PCB mounting. The contactor is certified to EN/IEC 60947-4-1, UL 60947-4-1, CSA C22.2 No 60947-4-1, and JIS C8201-4-1, making it accepted across North American, European, and Japanese installations.
The AC-3 rating of 12 A at 440 V governs motor switching — this contactor handles squirrel-cage motors during starting and running, where the inrush is several times the full-load current. The AC-3e variant adds energy-efficiency testing per IEC 60947-4-1. AC-1 rating covers resistive loads; AC-4 covers plugging and inching duty but at a reduced electrical endurance of 0.02 Mcycles at 72 A. Mechanical durability is 10 Mcycles, but the electrical life under AC-3 motor duty is 1.3 Mcycles at 12 A — the practical replacement interval for a motor-starting application.
Designed for PCB mounting via solder pins (0.035 mm diameter), this contactor occupies a 45 mm width footprint — compact enough for dense control boards. The IP2X finger-protection rating per VDE 0106 means it is safe for open-panel use where incidental contact is possible. Coil inrush is 30 VA at 20 °C, dropping to 4.5 VA hold-in; the coil lacks a built-in suppressor module, so an external RC snubber or free-wheeling diode should be added across the coil when driven by a PLC output or solid-state relay to prevent inductive kickback damage.