The CRT-53 from Teledyne Relays is a RF Switch with Frequency DC to 26.5 GHz, Insertion Loss 0.2 to 0.5 dB, Isolation 55 to 80 dB, Supply Voltage 12 to 28 V, Coil Voltage 12 to 28 V. Tags: Module with Connectors, Electro-Mechanical. More details for CRT-53 can be seen below.