The PDBF-R2/R25-4C5 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 0.2 to 0.25 GHz, Center Frequency 0.225 GHz, Insertion Loss [email protected], Rejection =40 dB @120 MHz & 340 MHz, Upper Rejection 40 dB. Tags: Surface Mount. More details for PDBF-R2/R25-4C5 can be seen below.