The S4TR-005435E4B from Corech Microwave is a RF Switch with Frequency 0.5 to 43.5 GHz, Insertion Loss 5.2 to 5.8 dB, Isolation 60 to 70 dB, Power 23.01 dBm, Power 0.2 W. Tags: Module with Connectors, Solid State. More details for S4TR-005435E4B can be seen below.