Siemens 3RT2024-1BB40 (24 V DC coil) is a 3-pole SIRIUS power contactor designed for AC-3e/AC-3 motor control. It switches up to 12 A and up to 5.5 kW at 400 V across three main contacts and includes an auxiliary contact pair (1 normally open, 1 normally closed) for signaling or interlocking. The device uses screw terminals and is sized for panel mounting in the S0 family. This contactor is intended for start/stop control of three-phase motors in industrial automation and PLC-driven control circuits.
