Motor-rating and coil drive
The 3RT2026-1HA40 is a SIRIUS power contactor rated for AC-3e/AC-3 duty at 25 A, switching 11 kW at 400 V three-phase — the typical load for a small pump or conveyor motor. The 12 V DC coil accepts 0.7 to 1.25 times the rated control supply voltage, so a nominal 12 VDC signal from a PLC or relay output will hold it in; plan for a 9–15 VDC window. Built-in 1 NO + 1 NC auxiliary contacts cover feedback or interlock without an add-on block.
Frame size S0 is a compact 92 x 54 x 115.5 mm footprint that snaps onto a standard DIN rail. Note: this variant cannot accept an add-on auxiliary switch block — the 1 NO + 1 NC contacts on board are all you get, so confirm your feedback count before locking the BOM.