Semiconductor relay, 1-phase 3RF2 Width 22.5 mm, 20 A 24-230 V / 110-230 V AC Screw connection Solid state relay SIRIUS 3RF21 for switching resistive/inductive loads, e.g. radiators or valves in a bottling plant. The devices switch wear-free and silently and are therefore ideal for noise-sensitive areas (offices, hospitals). They are extremely reliable even at high switching frequencies. The compact design saves space on the cooling surface. The solid state relays can also be expanded for a wide range of applications by simply clicking on the standardized 3RF29 function modules. The devices are approved worldwide (e.g. IEC and UL/CSA). The solid state relays are available as 1-phase devices in two widths or as 3-phase devices. They are available for different power ratings and rated operating voltages. Designed for AC or DC operation, they are available with screw, spring-loaded or ring cable lug connections. In addition to the 3RF29 function modules, control plugs and terminal covers are also available as accessories. Simple, efficient, always up-to-date - the SIRIUS modular system.
| Property | Value |
| Operating voltage: | 24 to 230 V |
| Rated operating current Ie at AC-1: | 20 A |
| Number of phases: | 1 |
| Suitable for series installation: | yes |
| Rated operating current Ie at AC-51: | 20 A |
| Rated control supply voltage Us at AC 50 Hz: | 110 to 230 V |
| Rated control supply voltage Us at AC 60 Hz: | 110 to 230 V |
| Type of voltage for actuation: | AC |
