The MN-30-520-4-S04 from Pole/Zero is a Tunable Filter with Frequency 30 to 520 MHz, Bandwidth 19.6 MHz, Insertion Loss 6 dB, Supply Voltage 4.5 to 5.5 V, Operating Temperature -40 to 85 Degree C. Tags: Surface Mount, Digitally Controlled. More details for MN-30-520-4-S04 can be seen below.