The BFCN-1900 from Mini Circuits is a Space Qualified RF Filter with Frequency 1.893 to 1.92 GHz, Center Frequency 1900 MHz, Stop Band Frequency DC to 5500 MHz, Power 2 W, Insertion Loss 2.6 to 3.2 dB. Tags: Surface Mount. More details for BFCN-1900 can be seen below.