Model 851-139-BLK is a 50 Ω Inner DC Block with a 10 – 3000 MHz operating frequency range. The maximum VSWR is 1.35:1, the maximum voltage is 50 Vdc and the RF connectors are TNC male / SMA female. Inner DC Blocks are realized by placing a capacitor of varying capacitance in series with the center conductor. The required frequency range, voltage breakdown and desired insertion loss determines the capacitance value selected. These devices allow RF to pass through a circuit with minimal interference while preventing DC to pass through the circuit. Solutions in 50 and 75 Ω impedances with a variety of RF connector combinations are standard. Custom impedances are available upon request. Please contact the factory with your unique requirement.