The SFQ0540-1XX from Sierra Microwave Technology is a RF Switch with Frequency 500 MHz to 4 GHz, Insertion Loss 1.9 to 4.5 dB, Isolation 65 dB, Supply Voltage 28 V, Switching Speed 25 nS. Tags: Module with Connectors, Solid State. More details for SFQ0540-1XX can be seen below.