Siemens SIRIUS 3RF4 Solid-State Switching Devices
Siemens SIRIUS 3RF4 Solid-State Switching Devices provide wear-free and noiseless switching of motors. The series is designed for frequently switching on/off AC drives up to 7.5kW and for reversing up to 3.0kW. These Siemens solid-state switching devices are fully insulated and can be mounted directly onto motor starter protectors, overload relays, and SIRIUS current monitoring relays. 3RF4 three-phase solid-state contactors are equipped with a two-phase control suitable for typical motor circuits without a connection to the neutral conductor. Siemens SIRIUS 3RF4 switching devices with a width of 45mm cover motors up to 2.2kW, and those with a width of 90mm cover motors up to 3kW.
Features
- Designed for switching on/off AC drives up to 7.5kW and reversing up to 3.0kW
- Insulated enclosure with integrated heat sink
- IP20 degree of protection
- Integrated mounting foot for snapping on a DIN rail or mounting on a support plate
- Variety of connection systems
- Plug-in control connection
- LED to indicate control voltage
Applications
- Industrial automation
- Motor switching
- Motor reversing
- Robotics
- Material handling
Specifications
- Width
- 45mm
- 2.2kW maximum motor power
- 5.2A operating current (contactor)
- 5.4A operating current (reversing contactor)
- 90mm
- 7.5kW maximum motor power (contactor)
- 3.0kW maximum motor power (reversing contactor)
- 16A operating current (contactor)
- 7.4A operating current (reversing contactor)
- 45mm
- Three poles
- Screw-type and spring-loaded terminals (contactor) or screw-type (reversing contactor)
- Rated operating voltage
- Up to 600V (contactor)
- Up to 480V (reversing contactor)
- 24VDC and 110VAC to 230VAC rated control supply voltage
Operator Controls & Equipment
Published: 2025-09-24
| Updated: 2025-10-07