Siemens SIRIUS 3RT Size S2, 3RT2 Contactor, 24 V ac/dc Coil, 3-Pole, 50 A, 22 kW, 3NO, 400 V ac

The 3RT2 contactors are climate-proof and are suitable and tested for use worldwide, sizes S00 to S2, up to 37 kW

Size S00, up to 7.5 kW
Size S0, up to 18.5 kW
Size S2, up to 37 kW
Screw connection / Spring Clamp
Impulse voltage resistance 6 kV
Insulation voltage 690 V
Real loss power only 4 W
Designation K according to DIN 40719 (extendable to IEC 204-2) & IEC 750; Q according to DIN EN 61346-2

Screw terminals can only be used with screw terminal overloads and spring terminals can only be used with spring terminal overloads.

CE, UL, CSA, CCC

Choose this three-pole contactor from Siemens for the efficient switching of high-current loads. It has a single-throw, NO (normally open) configuration, and it's also fitted with two auxiliary contacts – one NO and one NC (normally closed) – for use with interlocking circuits or for remote signalling of the main contact switching states. Screw terminals help you make secure electrical connections. The unit is current rated at 50A, voltage rated at 400V AC and power rated at 22kW to offer versatility. This contactor is suitable for applications such as switching motors and transformers.

• Operating temperature range of -25°C to +60°C for use in demanding environments
• DIN rail mounting for quick and simple installation
• +/- 180˚ rotation and +/- 22.5˚ tilt are possible on a vertical mounting surface to give you flexibility of design

Contactors are generally used for switching high-current applications of more than 15A, whereas relays are used to switch lower-current applications. Relays offer faster switching and take up less space, but contactors are easier to repair.