The MC4A1900F200FCA from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 1800 to 2000 MHz, Bandwidth 200 MHz, Center Frequency 1900 MHz, Insertion Loss 1.2 dB, Upper Rejection 30 to 40 dB. Tags: Surface Mount, Monoblock Filter, Dielectric Filter. More details for MC4A1900F200FCA can be seen below.