The R12-SF28018 from Talent Microwave Inc is a RF Switch with Frequency DC to 18 GHz, Insertion Loss 0.2 to 0.4 dB, Isolation 60 to 70 dB, Supply Voltage 12, 24, 28 V, Supply Current 83 to 190 mA. Tags: Module with Connectors, Electro-Mechanical. More details for R12-SF28018 can be seen below.