Semiconductor relay, 1-phase 3RF2 Width 22.5 mm, 50 A 48-600 V / DC 24 V Spring-loaded 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 various outputs 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: | 48 to 600 V |
| Rated operating current Ie at AC-1: | 50 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 DC: | 15 to 24 V |
| Voltage type for actuation: | DC |
