The 9BP45-15-3B-SFF from Quantic PMI (Planar Monolithics) is a Band Pass Filter with Frequency 37.5 to 52.5 MHz, Bandwidth 15 MHz, Center Frequency 45 MHz, Insertion Loss 6 dB, Rejection 35dB @ 107 and 123MHz and 40dB @ 95MHz and 65dB @ 135 to 600MHz and 65dB @ 0 to 80MHz. Tags: Module with Connectors, Lumped Component Filter. More details for 9BP45-15-3B-SFF can be seen below.