The Schneider Electric TeSys K LC1K12103K72 is a 3-pole contactor rated for AC-3 switching at 12 A up to 440 V, with a built-in 1 NO auxiliary contact and a 100 V AC coil. It handles motor loads up to 4 kW at 480 V and 5.5 kW at 380–415 V, making it a fit for small pumps, fans, and conveyors in control panels.
The 12 A AC-3 rating is the motor-switching current — the real-world number that governs whether this contactor holds in across starting inrush. At 480 V it carries 4 kW, at 380–415 V it carries 5.5 kW. The AC-4 category also covers plugging and inching duty, so it can handle reversing or jogging applications within the same current envelope. Coil technology uses a built-in bidirectional peak-limiting diode suppressor, which means the coil snubber is integrated — no external flyback diode needed across the coil terminals. This simplifies wiring and reduces panel assembly time. Flame retardance is rated V1 per UL 94 and also meets NF F 16-101 and NF F 16-102 Requirement 2, which is relevant for rail or transit applications where fire-smoke-toxicity standards apply.
The 45 mm width and 58 mm height fit standard DIN-rail enclosures alongside overload relays and terminal blocks.