The MC6A3950F300FCA from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 3800 to 4100 MHz, Bandwidth 300 MHz, Center Frequency 3950 MHz, Insertion Loss 2 dB, Upper Rejection 60 dB. Tags: Surface Mount, Monoblock Filter, Dielectric Filter. More details for MC6A3950F300FCA can be seen below.