Siemens 3RT1034-1BB40 3 Phase Power Contactor

Siemens 3RT1034-1BB40 Sirius Contactor is a three‑pole power contactor with a 24 V DC coil designed for AC-3 motor‑load duty, delivering 32 A at 400 V and up to 15 kW of load‑starting capacity. It features three main normally open contacts (NO) and no normally closed contacts (NC), with screw terminals in size S2 and a front IP20 enclosure (IP00 at the terminal block). The device provides an insulation rating up to 690 V and coil‑to‑main isolation of 400 V according to EN 60947‑1, making it suitable for control panels that require robust separation between control and power circuits. Mechanical life is listed at up to 10,000,000 cycles, with electronics‑compatible auxiliary configurations rated at 5,000,000 cycles. The 3RT1034‑1BB40 is part of Siemens’ SIRIUS family and is intended for motor control and other inductive loads in industrial environments, functioning reliably across an ambient range of -25 to +60 C and up to 2,000 m altitude.