The S5TR-004120E5B from Corech Microwave is a RF Switch with Frequency 0.4 to 12 GHz, Insertion Loss 1.8 to 2.4 dB, Isolation 65 to 70 dB, Power 30 dBm, Power 1 W. Tags: Module with Connectors, Solid State. More details for S5TR-004120E5B can be seen below.