The LC2K16017Y7 is a TeSys K reversing contactor from Schneider Electric — a 3-pole, 3 NO power pole contactor rated for AC-3 duty at 16 A up to 440 V, with a 660-690 V AC 50/60 Hz coil. The IP20 finger-safe enclosure (VDE 0106) suits it for panel-mount applications where operators need protection from accidental contact.
The AC-3 rating of 16 A at <=440 V is the motor-switching current — this contactor handles reversing duty on three-phase induction motors up to roughly 7.5 kW at 400 V. The 660-690 V coil voltage is unusual: it's a direct line-voltage coil, not a 24 VDC or 230 V control circuit coil. That means the coil energizes straight from the motor supply, saving a control transformer but requiring the control wiring to be rated for the same voltage class. The AC-4 utilisation category also covers inching and plugging duty, so it can handle frequent reversals under load.
The preassembled busbar saves a wiring step.