The 412K Series from Teledyne Relays is a RF Relay with Frequency 10 MHz to 1 GHz, Coil Voltage 5.0 to 32.0 V, Voltage 4.3 to 21.0 V (Pick-up Voltage), Power 500 mW, Resistance 50 to 1350 Ohms. Tags: TO-5. More details for 412K Series can be seen below.