The MTCA1804N from Yantel Corporation is a RF Variable Attenuator with Frequency DC to 18 GHz, Attenuation Range 4 dB, Attenuation Accuracy ±0.5 dB, Power 0.2 W, Operating Temperature -55 to 150 Degree C. Tags: Surface Mount, Temperature Variable. More details for MTCA1804N can be seen below.