The D30NA20Z4 from TTM Technologies is a Fixed Attenuator with Frequency DC to 4 GHz, Attenuation 20 to 20.2 dB, Power 30 W, Attenuation Accuracy ±0.4 to 0.6 dB, Operating Temperature -55 to 200 Degree C. Tags: Surface Mount. More details for D30NA20Z4 can be seen below.