75 Ohms Coaxial Contacts

75Ohms coaxial contacts are compatible with the main industry standard cables. They are designed to match the characteristic impedance of 75ohms and are dedicated for video application from standard definition to high-definition (up to 3G-SDI).  75ohms contacts are the perfect choice for video transmission applications for different markets such as Defense, Aerospace or Broadcast.
For more information, please go to our 75 Ohms contact page

SDI (Serial Digital Interface) defines protocol for video digital interface standardized by the SMPTE (The Society of Motion Picture and Television Engineers) late eighties.

Our impedance matched contacts meet the below requirements

  • SD-SDI – SMPTE259 – data rate up to 360Mbit/s – RL of -20dB from 5Mhz to 540MHz
  • HD-SDI – SMPTE292M – data rate 1,485GBit/s – RL of -15dB from 5MHz to 1,5GHz
  • 3G-SDI – SMPTE424M – data rate 2,970GBit/s – RL -15db from 5Mhz to 1,5Ghz then RL -10dB to 3GHz

For more info, regarding our Contacts for connectors, please consult our "Contacts for connectors" catalog.

Amphenol Socapex offers the largest range of coaxial contacts for 75ohms to fit in industrial & military connectors such as MIL-DTL-38999, EN3645, EN4165/SIM, 2M and 387TV series.

Our 75 Ohms Coaxial Contacts product brochure. Our range of 75ohms goes from contact size 12 to 6

Our engineering team has designed a dedicated interface to meet 75ohms impedance so even if they are close, our impedance matched contacts are not compatible with standard coaxial contacts (such as M39029/59 /60 etc…)


The 387TV series is a low-profile and small form factor connector so to keep it, optimized size 8 coaxial contacts have been designed. More info available on https://www.amphenol-socapex.com/en/products/connectors/38999-series-i-ii-iii/387tv-series


Yes, Amphenol Socapex proposes some 75ohms impedance matched size 12 to fit in our 2M connector series. Feel free to investigate our 2M connector product brochure.

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