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Inner DC Blocks

Pasternack inner DC blocks are passive coaxial components that prevent (block) the flow of direct current (DC) frequencies to RF signals. Inner DC blocks have a capacitor that is in-series with the center conductor. Inner DC blocks from Pasternack are available in 50 Ohm and 75 Ohm designs and can be purchased with varying frequency ranges. Many of our RF inner DC blocks are RoHS and REACH compliant.


50 Ohm inner DC blocks can be ordered with 2.4mm, 2.92mm, BNC, Type N and SMA connector types and have frequencies ranging from 10 MHz to 50 GHz. Our 75 Ohm inner DC blocks are available with Type N, F and BNC connectors only and have frequencies ranging from 10 MHz to 4 GHz. Voltage ratings for the Pasternack RF and microwave 50 Ohm inner DC blocks range from 75 Volts to 950 Volts depending on style. Our 75 Ohm RF inner DC blocks are available with voltage ratings of 200 Volts.


The Pasternack facility certified to ISO 9001:2015 ships all inner DC blocks from stock the same day you order them. Pasternack Enterprises offers the broadest and deepest inventory of RF and microwave components available. Expert technical support and friendly customer service personnel are always here to assist you. (sales@pasternack.com, techsupport@pasternack.com, 866-727-8376 US and Canada or +1-949-261-1920 International).

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