3RT1054-3AF36 3 Pole Contactor 115 A, 127 V Coil. The Siemens 3RT1 power contactor offer convincing performance from a compact design with high contact reliability. They can be combined with a variety of other components in the load feeder. The contactors offer the best connection to the automation level for every application (direct or via PLC input).The 3RT1 contactor are climate-resistant, approved for worldwide use (e.g. IEC and UL/CSA) and are IE3/IE4-ready.