The B052NC5S from Knowles is a Band Pass Filter with Frequency 4.8 to 5.6 GHz, Bandwidth 800 MHz, Center Frequency 5.2 GHz, Insertion Loss 2.25 to 2.75 dB, Rejection 40 to 45 MHz. Tags: Surface Mount, Ceramic Filter. More details for B052NC5S can be seen below.