Maintain Reliable PCB Contact in Space-Constrained Designs

Compact SMT contact solutions engineered for dependable electrical connections.

In compact electronic assemblies, maintaining reliable electrical contact is essential for stable system performance. Harwin Spring Contact Fingers are designed to provide dependable electrical contact through controlled mechanical compression between a PCB and its mating surface.

During assembly, the contact compresses against the mating surface, generating continuous contact pressure to help maintain reliable electrical continuity. This makes Spring Contact Fingers well suited for designs where space is limited, mechanical tolerances must be accommodated, or repeated contact is required.

 

Key Features: 

Harwin Spring Contact Fingers are available in SMT format for automated PCB assembly and are commonly used for grounding, RFI shielding, antenna contact, and general electrical contact applications. Depending on the selected part number, the range supports working heights from approximately 0.90mm to 6.95mm, current ratings up to 14A, and durability of up to 10,000 mating cycles. Finish options include gold and tin, with tape-and-reel packaging available for efficient automated assembly.

Key Highlights

✔ Compact SMT contact design

✔ Maintains reliable contact pressure during mating

✔ Suitable for wiping and sliding contact applications

✔ Compact footprint for space-constrained PCB layouts

✔ Available in gold or tin finish options

✔ Tape-and-reel packaging for automated assembly

✔ Supports grounding, shielding, antenna contact, and PCB-to-enclosure connections

Application and Market

Harwin Spring Contact Fingers are suitable for electronic applications that require reliable electrical contact within a compact PCB assembly.

Typical applications include:

• PCB grounding
• EMI/RFI shielding
• Antenna contact
• Board-to-board contact
• LED lighting assemblies
• RFID devices
• Vision systems

These contact solutions are commonly integrated into compact electronic products across industries such as automotive, industrial electronics, medical devices, wireless communications, and defense, depending on the application and system requirements.

Engineering Background:

In connected streetlight systems, engineers must integrate communication electronics into limited enclosure space. The unit must remain lightweight, self-contained, and easy to install on existing lighting infrastructure.

Traditional connection methods can increase space requirements, weight, or assembly complexity. For compact smart city electronics, the PCB connection method must support efficient production while maintaining a reliable interface between internal boards.

Harwin Solution

Harwin offers a comprehensive range of SMT Spring Contact Fingers in various heights, styles, contact forces, and finish options to support different PCB design requirements. The range is designed for automated assembly while providing dependable electrical contact in compact electronic systems.

Whether used for grounding, shielding, antenna contact, or PCB-to-enclosure connections, Harwin Spring Contact Fingers provide engineers with a compact and reliable SMT contact solution for modern electronic designs.

 

Download the Harwin Spring Contact Finger Technical Specifications

Access detailed product information, including dimensions, working heights, current ratings, finish options, packaging details, and selection guidance to help you choose the right Spring Contact Finger for your PCB design.

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Summary

Harwin Spring Contact Fingers provide a compact SMT contact solution designed to maintain reliable electrical contact in modern electronic assemblies. Through controlled mechanical compression, they help support grounding, shielding, antenna contact, and PCB-to-enclosure connections where reliability, space efficiency, and consistent electrical performance are essential.

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