The AE300L8975 from Anatech Electronics is a Low Pass RF Filter with Frequency 100 to 300 MHz, Insertion Loss 0.5 dB, Rejection 60 dB, Return Loss 18 dB, Operating_Temperature -40 to 70 Degree C. Tags: Module with Connector, Lumped Component Filter. More details for AE300L8975 can be seen below.