The BGSA12UGL8 from Infineon Technologies is a RF Switch with Frequency 400 MHz to 6 GHz, Insertion Loss 0.07 to 2.3 dB, Isolation 5.5 to 3.8 dB, Power 41 dBm, Power 12.58 W. Tags: Chip, Antenna Tuning Switch. More details for BGSA12UGL8 can be seen below.