C17200 beryllium copper earns its place in precision twist pin contacts because it behaves like a spring material first and a conductor second. It provides elastic recovery, strength, and fatigue resistance in fine needle wire form, while still offering enough conductivity for low-resistance contact designs. The C2680 brass pin body supplies structure and a current path, and the gold plating over an 80 microinch underplate protects the contact interface. When reviewing a twist pin contact, compare the full material stack: C17200 needle wire, C2680 brass body, laser-welded ends, gold thickness options, ≤10mΩ contact resistance, current rating, temperature range, and nominal 1000 mating cycles. The Ximeconn micro rectangular twist pin connector product information is a useful reference for those confirmed details.

FAQ

Q：Why is beryllium copper C17200 used in twist pin contacts?

A：C17200 is used because it combines elastic recovery, strength, and fatigue resistance with useful electrical conductivity. In a twist pin, the needle wire must flex repeatedly while maintaining contact pressure. C17200 can be formed into fine strands, laser-welded at the ends, and gold plated, so it supports both the spring function and the low-resistance contact function.

Q：Does C17200 improve electrical conductivity or spring performance?

A：It improves spring performance more than it improves conductivity. C17200 is not the highest-conductivity copper alloy, but it offers a strong balance between spring force, elastic recovery, and conductivity. For a twist pin contact, that balance matters because stable contact pressure keeps the real contact area and resistance under control.

Q：How does gold plating interact with beryllium copper contact wires?

A：Gold plating over an 80 microinch underplate protects the C17200 surface from oxidation and helps maintain a stable low-resistance interface. The gold thickness can be 0.8μm, 1.27μm, or custom. Thicker gold generally supports more mating cycles, while thinner gold can suit lower-cycle applications. The right choice depends on the expected wear, current, and mating conditions.

Sources / References

Tool Steels- Chromium Hot-Work Steels

Theoretical analysis of linked leading-edge and trailing-edge flap-type controls at supersonic speeds - NASA Technical Reports Server (NTRS)

Experts in Interconnects | Connector Supplier

Related Examples

Micro rectangular twist pin connector product information