Siemens SIRIUS 3RH21 control relays. These are industrial control relays used for switching auxiliary circuits and control circuits. They come in different configurations, including 4-pole versions. If you're looking for specific details, such as voltage ratings or terminal types.

Frame Size: S00

Number of Contacts: Available in 4-pole configurations

Contact Types NO (Normally Open) and NC (Normally Closed)

Shock Resistance:7.3g / 5ms at AC

Ambient Temperature Range:25°C to +60°C during operation

Mounting: DIN rail mounting compatible