The SMG40 from MACOM is a RF Variable Attenuator with Frequency 500 to 4000 MHz, Attenuation Range 22 to 39 dB, Peak Power 1 W, Insertion Loss 2.2 to 4 dB, Switching Time 0.5 to 5 dB. Tags: Surface Mount, Voltage Controlled. More details for SMG40 can be seen below.