Siemens 3TF47 Three-Phase Heavy-Duty Contactor

Siemens 3TF47 is a three-pole, heavy‑duty AC contactor designed for motor control and power switching in industrial automation. It offers AC‑3 duty with a rated operating current of 63 A at up to 400 V three‑phase, and uses a 110–120 V coil in typical North American installations. The unit ships with two normally open and two normally closed auxiliary contacts, enabling basic signaling or interlock functionality without separate blocks. As part of Siemens' Sirius/World Series family, the 3TF47 is designed for compatibility with standard Siemens contactor accessories, including replacement kits such as the 3TY7470‑0A main contact kit.