Contact Resistance and Temperature Rise in DC Connectors

Published by Dongguan Dajiang Electronics Co., Ltd /HK Dajiang Group Limited October 09,2026

Contact Resistance and Temperature Rise in DC Connectors

Field	English
URL slug	/guides/contact-resistance-temperature-rise-dc-connectors/
Meta description	Learn how contact resistance creates heat in DC connectors and how to evaluate temperature rise, load conditions, contact quality, and test data.
Primary audience	Electrical engineers, quality engineers, and procurement teams

English copy

Contact resistance links the electrical interface to heat generation and voltage loss. Contact force, plating, contamination, alignment, wear, and crimp or solder quality can all affect the result.

Temperature rise is influenced by current, wire size, duty cycle, ambient temperature, airflow, enclosure, contact geometry, and test duration. For selected Dajiang power models, contact resistance below 10 mΩ is described as a target; confirm the exact model data before approval.

Ask for the test current, stabilization time, ambient condition, sample size, measurement method, and acceptance limit. Then run a representative load test using the final connector, wire, housing, and installation method.

FAQ

Question	Answer
What causes contact resistance to increase?	Wear, oxidation, contamination, insufficient contact force, poor alignment, and plating problems can contribute.
Is lower resistance always better?	Lower resistance usually reduces loss, but the complete contact design and application test still matter.
What data should a supplier provide?	Request resistance method, current, ambient temperature, duration, sample size, and temperature-rise data.

CTA: Request a model-specific contact-resistance and temperature-rise review.