Перегрев наружных LED-разъёмов

Контактное сопротивление, обжим и температурная проверка.

Mechanism

Connector capacity depends on contact resistance, current, ambient, wire size, loaded contacts, aging and heat dissipation.

Calculation

P=I²R. Illustrative: 12 A at 5 mΩ gives 0.72 W; at 20 mΩ it gives 2.88 W. These are not product results.

Validation

1. Freeze all part numbers and wire.
2. Control crimp and mating.
3. Measure current, millivolt drop and temperature rise.
4. Retest after environmental conditioning.

Do not approve

• Generic current rating only.
• Unspecified hand crimping.
• Corroded contacts are reused.

FAQ

Can a connector below rating overheat?

Yes, if assembly or environmental conditions differ from its rating basis.

Sources

1. IEC 61984
2. IEC 60598-1
3. TE guidance
4. Fluke thermography
5. LIKELIGHT

Author: LikeLight Tom, Operations. Technical reviewer: 待确认.