Siemens 3RT2045-1NP30 Industrial AC Contactor

Siemens 3RT2045-1NP30 is a SIRIUS power contactor, 3-pole, designed for AC-3e/AC-3 duty and rated to switch up to 80 A with a 37 kW load rating at 400 V. It includes an integrated varistor for surge protection and provides an auxiliary contact pair of 1 normally open and 1 normally closed, all in a compact size S3 with screw terminals. The coil accepts 175–280 V AC/DC control voltages and operates at 50/60 Hz, allowing compatibility with a broad range of control circuits. Main circuit voltage protection and isolation specifications accommodate up to 690 V between coil and main contacts, with insulation rated up to 1,000 V. Front-facing IP rating is IP20, aligning with standard enclosure environments in control panels. This device is part of Siemens’ SIRIUS 3RT2 family, commonly used to start and stop motors, pumps, fans, and conveyors in industrial automation, offering reliable motor switching in a compact footprint and straightforward wiring through its screw terminals.