The ATN03-0040PSM from Marki Microwave is a Fixed Attenuator with Frequency DC to 40 GHz, Attenuation 3 dB, Power 2 W, Attenuation Accuracy ±0.3 dB, Operating Temperature -55 to 100 Degree C. Tags: Surface Mount. More details for ATN03-0040PSM can be seen below.