The SRF300 Series from Teledyne Relays is a RF Relay with Frequency DC to 6 GHz, Coil Voltage 5.0 to 12.0 V, Voltage 3.6 to 9.0 V (Pick-up Voltage), Current 25.6 to 128.2 mA, Power 370 to 500 mW. Tags: TO-5. More details for SRF300 Series can be seen below.