Siemens 3TH2040-0AG1 Contactor

Siemens 3TH2040-0AG1 is a 3TH20 family Hilfsschütz (auxiliary contactor) with four normally open contacts and screw-terminal wiring for dependable control-circuit switching. The AC coil is rated for 110 V at 60 Hz or 92 V at 50 Hz, enabling compatibility with a range of control-power schemes. This device adheres to DIN EN 50011 and is configured for auxiliary signaling and interlock tasks within Siemens automation systems, making it well-suited for PLC and motor-control control circuits. With its 4 NO contacts, it provides straightforward signal expansion and reliable actuation in control panels and automation circuits, aligning with Siemens’ broader family of contactors and relay devices.