The TSB1N21D3G75LV0EQT from TAIYO YUDEN (U.S.A.) Inc is a Band Pass Filter with Frequency 3300 to 4200 MHz, Bandwidth 900 MHz, Center Frequency 3750 MHz, Operating_Temperature -40 to 85 Degree C. Tags: Surface Mount, Ceramic Filter. More details for TSB1N21D3G75LV0EQT can be seen below.