Siemens 3RT2024-1BB40 Industrial Control Contactor

Siemens Sirius 3RT2024-1BB40 is a three-pole power contactor designed for AC-3e/AC-3 motor duty with a 24 V DC coil. It is rated for 12 A and up to 5.5 kW at 400 V, making it suitable for controlling small to mid-sized three-phase motors in automation and control panels. The device includes one normally open and one normally closed auxiliary contact and uses screw terminals for secure wiring, while its size is specified as S0 with upright mounting orientation. This compact 3RT2 family component provides reliable switching for motor loads within Siemens’ Sirius control ecosystem, enabling straightforward integration with overload relays and protective devices in a panel or machine starter assembly.