SD-X1411BP6L3 – Custom Gold-Plated Contact Spring for Earbud Charging Cases & Audio Devices

The SD-X1411BP6L3 is a custom-engineered spring contact designed for reliable electrical connection in earbuds, charging cases, and compact wearable devices. It acts as a conductive bridge between the device cover and the internal PCB, ensuring stable signal transmission or charging contact when the enclosure is closed. Manufactured with SUS301 stainless steel and selectively gold-plated, it delivers excellent conductivity, corrosion resistance, and long-term durability in demanding consumer electronics applications.

Key Specifications
Material / Plating: SUS301 stainless steel (t=0.06mm), selective 0.8µm gold plating on contact area

Electrical Rating: DC 10V, 24mA max, contact resistance ≤50mΩ

Mechanical Life: ≥1,500 actuation cycles

Environmental Compliance: Salt spray test 24 hours; operating temperature -40℃ to +85℃; humidity 10% to 90% RH

Packaging: Tape-and-reel, 32.73 meters per reel (~4,000 pieces per reel)

Dimensions & Tolerances: Compliant with EIA-481-D standards; key dimensions detailed in drawing BTA1411P6V3-001

Features & Benefits
Low & Stable Contact Resistance: Gold-plated surface ensures reliable electrical performance

High Durability: SUS301 stainless steel provides consistent elasticity and fatigue resistance

SMT-Compatible: Designed for automated pick-and-place and reflow soldering processes

Environmental Resilience: Withstands temperature extremes, humidity, and corrosive atmospheres

Precision-Engineered: Tight tolerances ensure consistent fit and function in assembly

Typical Applications
Charging contacts in wireless earbud charging cases

Grounding or signal springs between earbud drivers and housing

Cover open/close detection switches in portable electronics

Antenna contact points or shield grounding in compact devices

Electrical interconnection in foldable or hinged consumer products

Customization & Support
This product can be customized in dimensions, plating thickness, packaging, and reel specifications. Samples and OEM/ODM support are available upon request.

5. Suggested Image Alt Text
Main product image: SD-X1411BP6L3 custom gold-plated contact spring for earbuds

Dimension drawing: SD-X1411BP6L3 contact spring dimensions and tolerances

Application example: Contact spring used in wireless earbud charging case assembly

6. Tags / Keywords
text
contact spring, gold-plated spring, earbud charging contact, stainless steel spring, SD-X1411BP6L3, SUS301 spring, SMD contact, tape and reel spring, wearable electronics, charging case parts, Bluetooth accessory, custom spring contact, low resistance contact, audio device spring
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