The AE45B6758 from Anatech Electronics is a Band Pass Filter with Frequency 40 to 50 MHz, Bandwidth 10 MHz, Center Frequency 45 MHz, Upper Rejection 80 dB @ 70 MHz, Lower Rejection 80 dB @ 0-20 MHz. Tags: Surface Mount, Lumped Component Filter. More details for AE45B6758 can be seen below.