The BGSX44MU18 from Infineon Technologies is a RF Switch with Frequency 400 MHz to 7.125 GHz, Insertion Loss 0.46 to 2.7 dB, Isolation 12 to 44 dB, Power 38 dBm, Power 6.30 W. Tags: Surface Mount, Solid State, Antenna Tuning Switch. More details for BGSX44MU18 can be seen below.