Spring Fingers – Mobile Internal Connectors

Mobile Internal Connectors

Spring finger contacts (also known as shield fingers, grounding springs, universal ground contacts, or clips) can be used in all types of small printed circuit board applications across all industries.

A spring finger is a single contact, surface mountable internal connector with multiple functions on a printed circuit board (PCB). It can be used for antenna feeds, low voltage electrical connections, or for grounding to prevent EMI noise and static caused by a speaker, motor, microphone, or any other vibration within an application. We continue to expand our spring finger contacts portfolio, offering a broad range of styles, heights, and materials to meet all customers’ needs. 

Scalable Spring Finger Contacts (English)

A 360-degree view of our spring fingers – also known as shield fingers, grounding fingers, or universal contacts.

  • Slim Solutions (English)

Benefits

  • Used for grounding between a device and PCB
  • Provides shielding for anything that can cause vibrations within a device, such as motors, speakers, and microphones
  • Provides a cost effective solution for antenna feeds in all types of devices
  • Requires limited space on a PCB
  • Used as a connection for simple stacking applications between primary and secondary PCBs
  • Available in heights as low as 1.0mm and up to 4.3mm
  • Accommodates soldering and pick and place, using standard equipment

Applications

  • Mobile phones
  • Wearable devices
  • Game consoles
  • Tablets
  • Patient monitoring devices
  • POS scanners
  • Security systems
  • GPS devices
Smart Phones
Slim and powerful smart phones
Fitness Bands
Wearables
Game Systems
Gaming systems
Security Systems
Security systems

Frequently Asked Questions

Spring Finger Contacts

Question Answer
Why would I use a pre-loaded spring finger in an application? A pre-loaded spring finger allows for the same amount of force with a smaller compression and provides a stable electrical contact with minimal deflection. These features are useful for applications with limited available height.
Which style of spring finger is best for my application?  Spring fingers are typically some of the last pieces added to a board. The type used depends upon the height and space left on the board, but the decision is typically based on your design needs. 
Can I combine different types of spring fingers in an application?  Yes, an application can have multiple spring fingers of more than one type. For example, simple C types can be used for grounding between the device and the PCB, while multiple pre-loaded spring fingers are used on the board for shielding or other simple connections. 
What are the benefits of using a scalable spring finger?  Scalable spring fingers use a common footprint, allowing easy design changes without requiring any extra space. 
These versatile contacts can be mounted on a single footprint so the customer can swap in a new size easily when a design change is needed.
Eric Himelright,
Vice President, Product Development
Scalable Spring Finger Contacts