The R401K-420852 from Microwave Products Group is a RF Switch with Frequency DC to 26.5 GHz, Insertion Loss 0.42 to 0.8 dB, Isolation 60 to 85 dB, Power 2 W, Supply Voltage 11 to 14 V. Tags: Module with Connectors, Solid State. More details for R401K-420852 can be seen below.