The LC1K1201D7 is a 3-pole contactor from the TeSys K range, rated 12 A in AC-3 and AC-3e utilisation categories at ≤440 V — that's the motor-switching current, so it handles a typical 5.5 kW induction motor on a 400 V line. The 42 V AC coil pulls 30 VA inrush, holds at 4.5 VA, and dissipates 1.3 W once sealed. That low hold-in power keeps the panel thermal budget tight, and the 1.3 W is easy to vent in a crowded enclosure.
The screw-clamp terminals accept one or two conductors: 1.5…4 mm² solid, or 0.75…4 mm² flexible without ferrules, or 0.34…2.5 mm² with ferruled ends. That covers the common motor-circuit wire sizes in a 5.5 kW branch. The single built-in NC auxiliary contact handles signalling or interlocking without an add-on block.
Durability and safety
Mechanical durability is 10 million cycles — that's a decade-plus in a cycling conveyor or pump application. Electrical durability depends on load: 1.3 million cycles at 12 A AC-3 (motor), 300,000 cycles at 20 A AC-1 (resistive), and 20,000 cycles at 72 A AC-4 (plugging/inching). For safety circuits, the B10d value is 1,369,863 cycles under nominal load per EN/ISO 13849-1, which is the figure a safety integrator needs for SIL/PL calculations. The contactor carries EN/IEC 60947-4-1, UL 60947-4-1, CSA C22.2 No 60947-4-1, and JIS C8201-4-1 certifications — so it's accepted in European, North American, and Japanese panels without a separate approval run.