The MC8A3950F500KCA from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 3700 to 4200 MHz, Bandwidth 500 MHz, Center Frequency 3950 MHz, Insertion Loss 1.5 to 1.7 dB, Upper Rejection 2 to 38 dB. Tags: Surface Mount, Monoblock Filter, Dielectric Filter. More details for MC8A3950F500KCA can be seen below.