The GRF312 Series from Teledyne Relays is a RF Relay with Frequency DC to 8 GHz, Coil Voltage 5.0 to 12.0 V, Voltage 3.6 to 9.0 V (Pick-up Voltage), Power 450 mW, Resistance 50 to 390 Ohms. Tags: TO-5. More details for GRF312 Series can be seen below.