Siemens 3RT2025-1AM20 Three Pole AC Contactor

Siemens Sirius 3RT2025-1AM20 is a three-pole AC contactor designed for reliable motor-on/off control in three‑phase circuits. The basic unit carries a main contact rating of 16 A (AC-3) and includes an integrated auxiliary contact block with 1 normally open and 1 normally closed contact, both wired via screw terminals for robust connections. Up to four additional auxiliary contacts can be added by removing the existing block, enabling flexible control logic. The device uses a 208 V AC coil rated for 50/60 Hz operation, and it is a size S0 unit suited for compact installations. It can switch a motor up to 10 HP at 460 V, and the main circuit is rated for up to 690 V AC, with front IP20 protection for indoor use. The 3RT2025-1AM20 belongs to Siemens Sirius 3RT2 motor-contactor family and is designed to integrate with standard control panels and overload protection such as Siemens 3RU2 overload relays, providing a modular approach to motor control.