The DPX252500DT-5217A1 from TDK is a Diplexer with Frequency f1 1.572 to 1.578 GHz, Frequency f2 2.4 to 2.5 GHz, Attenuation 25 to 54 dB, Attenuation f1 25 to 33 dB, Attenuation f2 25 to 54 dB. Tags: Surface Mount. More details for DPX252500DT-5217A1 can be seen below.