Siemens 3TF56 Contactor

Siemens 3TF56 Size 5 is a three-pole World Series motor-contactor designed for heavy-duty AC motor control, rated up to 400 A on AC-3 duty and built for industrial equipment such as pumps, fans, conveyors, and compressors. This model is configured with a 110/120 VAC control coil and includes two normally open and two normally closed auxiliary contacts, enabling standard control circuits and logic interlocks. Load-side voltage ratings for the 3TF56 family align with typical industrial drives, with Siemens documentation and third-party listings confirming use up to the 600 V class. It is suitable as a direct substitute in Siemens Sirius 3TF installations and is part of the same World Series family, offering compatibility with compatible accessories and replacement parts. For retrofit or new builds, the 3TF56 Size 5 provides a compact yet robust solution for motor starters in rugged environments.