The Siemens 3RT2 series is a power contactor with auxiliary contact 1 NO + 1 NC 3-pole,size S3 spring type terminal, with integrated varistor. SIRIUS 3RT2 used for switching motors. The Siemens 3RT2 contactors are part of the modular SIRIUS system with its optimally coordinated products. They 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 (parallel, via ASi or IO-Link). Pre-installed auxiliary switches reduce the complexity of your design. They offers fast, maintenance-free and vibration-proof connection. They are available in various sizes and in a wide performance range. Simple, efficient and always up to date - SIRIUS modular system. SIRIUS 3RV29 infeed system considerably reduce the wiring expense.