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TE Connectivity





Spring Fingers Overview

Spring fingers (also known as shield fingers, grounding springs or universal ground contacts) are used in almost every small printed circuit board application. A spring finger is a single contact, surface mountable, internal connector. It provides and electrical connection and grounding from EMI noise and static between a PCB and other electronic components, such as a secondary PCB, shield cam, antenna, or speaker. TE Connectivity offers a wide selection of spring fingers in varying styles and sizes depending on the type of application.

Key Features:

  • Used for grounding between device and PCB
  • Provides shielding from vibration from motors, antennas, speakers and microphones
  • Used as a connection for stacking applications between primary and secondary PCBs
  • Available in effective heights of 0.3mm - 6.5mm
  • Requires limited space on a PCB
  • Accommodates soldering and pick-and-place using standard equipment

Applications:

  • Mobile devices
  • Home entertainment
  • Personal computing
  • Industrial equipment


Types of Spring Fingers

Standard-Flat Contact
Standard Box or C type spring fingers both have simple geometry for easy application.

Box C

Ultra Low Profile
Ultra low profile, Y type spring fingers, are used in applications where low effective heights are needed.

Ultra Low Profile

Pre-Loaded-Round of Flat Contact
Pre-loaded spring fingers are recommended when a stable electrical contact with minimal deflection is needed. The force change is minimized over working range of the spring finger.

Pre-Loaded-Round or
Flat Contact

Pre-Loaded Scalable
The scalable family of spring fingers offers the same benefits as pre-loaded spring fingers, but with a common footprint.

Pre-Loaded Scalable

Part Number View Inventory
1447009-5 Y Type Nickel
1565158-1 Pre-Loaded Gold over Nickel
1746136-1 Box Type Gold Over Nickel
1746854-1 1746854-1 Pre-Loaded Nickel

See also:
Spring Fingers Overview Quick Reference Guide (.pdf) for more product information, specifications, applications and ordering information.

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