The Schneider Electric LP2K1210ZD3 is a TeSys K reversing contactor — a 3-pole unit rated for AC-3 duty at 12 A up to 440 V, with a 20 V DC coil and one normally-open auxiliary contact. It ships preassembled with the reversing power busbar, so you don't have to source and install the crossover wiring separately. This is a control-class contactor (not a power-switching device), built for motor starting and resistive load switching in panels where space is tight — the footprint is 90 mm wide by 58 mm high by 57 mm deep.
AC-1 covers resistive loads like heaters. The 20 V DC coil is the control voltage; it holds in at nominal and drops out reliably below the pick-up threshold. IP20 finger-safe protection (VDE 0106) means it's suitable for enclosed panels where operators may reach in — no additional shrouding needed for basic touch protection.