The ELELA50P50B40BQ from ECHO Microwave is a Low Pass RF Filter with Frequency 0 to 50 MHz, Bandwidth 50 MHz, Insertion Loss 0.7 dB, Rejection 40 min. @ 132~600MHz, Return Loss 15 dB. Tags: Module with Connector, Lumped Component Filter. More details for ELELA50P50B40BQ can be seen below.