Expert insights, guides, and engineering resources to help you design reliable connections for any application.
Pitch is only the first filter. It does not guarantee electrical capability, mating compatibility or footprint interchangeability. Select the full connector system and apply the manufacturer’s derating data.
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Pitch is only the first filter. It does not guarantee electrical capability, mating compatibility or footprint interchangeability. Select the full connector system and apply the manufacturer’s derating data.
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Selection note: Current, temperature, wire range and mating-cycle figures are system-specific. Confirm the exact housing, terminal, header, wire and derating conditions in the manufacturer data sheet before release.
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Selection rule: Do not specify a retention force from a generic table. Obtain it from the exact mating pair’s data sheet and validate the completed harness under the required vibration, pull and thermal conditions.
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Engineering note: Per-circuit current is not a blanket connector-family value. It depends on the selected terminal, wire gauge, circuit count, temperature rise and application derating.
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Important: “JST-style” is not a specification. Choose the housing, terminal and header from the same approved JST series, then confirm the exact wire range and derating in the applicable data sheet.
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Migration rule: A 2.54 mm prototype header cannot be exchanged for a JST or Molex connector without a PCB and harness change. Verify footprint, header orientation, keying, terminal and cable assembly together.
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Do not use the numeric crimp-height examples in this article as production release limits. The correct height, pull requirement and visual criteria come from the selected terminal’s manufacturer drawing and the approved applicator setup.
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Quality rule: A reliable termination is defined by the connector manufacturer’s approved terminal, wire, applicator and inspection criteria—not by a generic crimp height or a visual impression alone.
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Safety boundary: Connector selection does not replace pack protection, insulation coordination, creepage/clearance analysis, fault-current design or battery certification. Treat every stated current value as subject to wire, temperature and derati...
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