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What is the typical contact resistance requirement for connectors?

2026-05-21 411

There is no universal standard for connector contact resistance; it primarily depends on the application and type. Most consumer electronics and general-purpose connectors require ≤100 mΩ, while precision or high-frequency applications require ≤10–50 mΩ.

Typical requirements in different scenarios:

Consumer electronics: General connectors such as USB, HDMI, and headphone jacks typically require contact resistance ≤100 mΩ. Some high-end products tighten this to ≤50 mΩ to ensure stable signal and power transmission.

Industrial and power applications: High-current connectors (e.g., power terminals) require ≤10–50 mΩ to reduce conduction loss and prevent overheating.

Precision and high-frequency applications: RF connectors (e.g., SMA, BNC) and medical device connectors require ≤1–10 mΩ to minimize signal attenuation and interference, ensuring transmission accuracy.

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