The E4-3-FIS/28 from MCLI is a RF Switch with Frequency DC to 4 GHz, Insertion Loss 0.25 dB, Supply Voltage 28 V, Supply Current 250 mA, Actuator Voltage 28 Vdc. Tags: Module with Connectors, Electro-Mechanical. More details for E4-3-FIS/28 can be seen below.