Siemens 3TF2 3 Pole Contactor – 9 A, 24 V dc Coil, 3NO, 10 kW. Siemens 3TF2 3 Pole Contactor 9 A 24 V dc Coil 3 Normally Open contacts 10 kW 3TF2 Siemens is a reliable and durable contactor used in various industrial applications such as manufacturing, automation, and control systems. This high-quality product can be purchased at PLC2Day, a leading supplier of industrial automation products.