The D4 Series from Ducommun is a RF Switch with Frequency DC to 12.4 GHz, Insertion Loss 0.20 to 0.50 dB, Isolation 60 to 80 dB, Supply Voltage 12 to 28 V, Switching Speed 15 mS. Tags: Module with Connectors, Electro-Mechanical. More details for D4 Series can be seen below.