Designed for high operating switching frequency the Sirius SC Solid State Relays and Contactors feature a long lifespan of rugged reliability in adverse conditions, with quiet operation, physically compact sizes, and snap on function modules for convenient flexible use. The Sirius SC is a single phase or 3 phase device with a power voltage range of 24 - 600 VAC, 10 - 90 Amps.

SIRIUS SC solid-state relays for mounting on heat sinks feature inline (Top Power and Botton Load) connections for a space saving clean cabinet layout. 
 
3RF21 ( 22.5 mm wide - single phase slim line)
3RF20 ( 45 mm wide - single phase - hockey puck style)
3RF22 ( 45 mm wide - 3 phase)

Connection Terminology:

Control Circuit: Screw, Spring Loaded    Power Circuit: Screw, Spring Loaded, and Ring Tongue

3RF20

3RF21

Solid State Contactors - solid-state relay combined with an optimized heat sink.

3RF23 (22.5 mm - single phase)
3RF24 (45 mm - 3 phase with reversing versions available)

"Zero-point Switching" - for heating elements: "Instantaneous Switching" - for inductive loads

Special Versions   (1.) "Low Noise" - Class B according to EN 60947-4-3
                                  (2.) "Short-Circuit Proof" - With 5SY4 - B trype Supplementary Protector

3RF23 - 1 Pole Solid State Contactors

Solid State Function Modules - Snap onto a 22.5 relay or contactor

Converter - Convers an analog 0-10V signal to set the power of a load as a percentage depending on an input signal.

Load monitoring - Monitors a load circuit which is connected to the semiconductor switching device.  Detected faults are LED indicated and a digital output is available.  Basic Module - 6 sub loads, Enhanced Module - 12 sub-loads

Power controller - Combines the functionality of the Converter and the Load Monitoring modules into one module.

Power controller using P control: Maintains the power when the voltage or the load resistance changes.

Soft start current limiting: Limits inrush using phase control, with an adjustable voltage ramp.  For applications such as lamps which have a high inrush current.

3RF29 - Function Modules