The Schneider Electric GC1620D7 is a TeSys GC modular contactor — a 2-pole (2P) device with a 42 V AC 50/60 Hz coil, rated for 16 A in the power circuit. This is the part you spec into a panel when you need remote switching of lighting, heating, or motor loads in a compact footprint.
Rated for utilisation categories AC-7A and AC-7B, so it handles both resistive (heating, lighting) and moderate inductive (motor) loads up to its 16 A thermal current (Ith). Coil hold-in is specified at 42 V AC; dropout occurs between 0.2 and 0.75 Uc, so expect it to release cleanly on a sagging control supply. Mechanical durability is rated at 1,000,000 cycles, with electrical durability at 100,000 cycles for both AC-7A and AC-7B duty. Maximum operating rate is 300 cycles per hour at 50 °C. The 1.3 W heat dissipation at 50/60 Hz (0.65 W per pole) is low enough that you don't need to derate adjacent devices in a crowded DIN-rail row, but it's still real heat — keep ventilation slots clear. IP20 finger-safe with the enclosure, IP40 inside a panel. Screw-clamp terminals accept up to 6 mm² solid or flexible on the power side, 2.5 mm² on the control side. Tightening torque is 0.8 N.m for both circuits.