The PSF-030-25 from Teledyne Microwave Solutions is a RF Variable Attenuator with Frequency 100 to 4000 MHz, Attenuation Range 20 to 45 dB, Power 0.2 W, Insertion Loss 2.5 to 3.5 dB, Switching Time 0.5 to 1 uSec. Tags: Surface Mount, Voltage Controlled. More details for PSF-030-25 can be seen below.