What are the requirements for the pull-out strength (or extraction force) of a crimped terminal, and what is the test method?

After crimping, the terminal’s pull-out strength (withdrawal force) requirement depends on the specific terminal part number, the wire size, and the customer/end-use standard. In general, it should meet the terminal datasheet specification as well as the customer’s acceptance criteria.

Typical pull-out strength requirement (how it is stated) Suppliers usually specify:

Force level (e.g., “≥ X N” or “≥ Y lbf”), and Test conditions (wire size, terminal size, number of crimps tested, temperature/time conditioning if required), Whether the test is for conductor crimp only or conductor+insulation crimp, and Acceptance rule (e.g., minimum force before failure, and what failure modes are acceptable). Test method (common approach) Sample preparation

Select terminals crimped with the specified wire/conductor and correct crimp tooling. Condition samples if required (e.g., ambient, pre-aging, temperature conditioning). Test setup

Clamp the terminal body in a fixture that prevents bending or slipping of the housing. Attach the wire to a load tester (tensile testing machine). Pull-out test

Apply a tensile load in the axial direction of the wire (pulling straight out). Use a defined test speed/extension rate (often specified by the standard or datasheet). Record the peak force at the moment of pull-out or failure. Evaluation / pass-fail

The test passes if the measured peak force is ≥ the specified minimum. Failure modes are reviewed (e.g., conductor pull-out, insulation slip, deformation). Some standards require specific failure-mode acceptability. What we need to answer precisely To give you the exact pull-out strength value (minimum/typical) and the exact test standard/procedure, please provide:

the terminal part number (or datasheet), wire size (AWG/mm²) and insulation OD, whether your application requires a specific standard (e.g., customer internal spec, UL/IEC/automotive standard), and whether testing should be for conductor crimp, insulation crimp, or both. If you share the terminal part number, I can draft a compliant statement like: “Pull-out strength: ≥ X N at wire size AWG Y, tested per [standard] with [speed] and acceptance criteria as defined.”