Spring Fingers
DATA AND DEVICES /// SPRING FINGERS
Spring fingers (also known as shield fingers, grounding springs, universal ground contacts or antenna 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 PCB. Spring fingers can be
used for antenna feeds, low voltage electrical connections and grounding or shielding. They are beneficial in
preventing EMI noise and static caused by speakers, motors, microphones or any other type of connector that
can cause vibration within an application. TE Connectivity (TE) continues to expand its spring finger portfolio
oering a broad range of styles, heights, and materials to meet all customers’ needs.
Features
• 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 eective solution for
antenna feeds in all types of devices
• Used as a connection for simple
stacking applications between
primary and secondary PCBs
• Available in heights as low as
0.4mm and up to 7mm
• Requires limited space on a PCB
• Accommodates soldering and pick
and place using standard equipment
Benefits
• Prevents EMI noise and static
• Provides a highly
reliable connection
• Provides an easy and
inexpensive method for
connecting multiple PCBs
• Allows for versatility in PCB layout
• Provides flexible, quick-turn
design-ins
• Does not require expensive,
specialized application equipment
Applications
• Mobile phones
• Wearable devices
• Game consoles
• Tablets
• Patient monitoring devices
• POS scanners
• Security systems
• GPS devices
PAGE 2DATA AND DEVICES /// SPRING FINGERS
Applications and Industries
Consumer Electronics
• Smart Home Electronics
• Fitness Equipment
• Gaming Consoles
• Wearable Devices
• Home Entertainment Systems
• Payment Terminals
• Tablets
• Mobile Phones
Industrial / Automotive
• POS Scanners
• Security Systems
• Thermostats
• Backup Cameras
• GPS
• Satellite Radio
• Infotainment
Consumer Electronics
• Smart Home Electronics
• Fitness Equipment
• Gaming Consoles
• Wearable Devices
• Home Entertainment Systems
• Payment Terminals
• Tablets
• Mobile Phones
a
b
Tablet PCB
a. Used for grounding or shielding on the PCB
b. Used for an antenna feed
Wearable Device PCB
Used for grounding between the PCB
and the cover of the device
Medical Device PCB
Used for grounding or shielding on the PCB
PAGE 3DATA AND DEVICES /// SPRING FINGERS
Types of Spring Fingers
Standard-flat
Contact
Ultra-small
Contact
Oered in dierent heights
and styles/form factors, ultra
small spring fingers are used in
a broad range of applications
with space constraints
across various industries.
Ultra-low
Profile
Ultra low profile, Y type
spring fingers are used in
applications where low
eective heights are
needed.
Pre-loaded
Contact
Pre-loaded spring fingers
are recommended when a
stable electrical contact with
minimal deflection is
needed. The force change is
minimized over the working
range of the spring finger.
Pre-loaded spring fingers
are available in three
scalable families.
Standard box and C type
connectors both have simple
geometry for easy application.
Box CPre-loaded Y Small
Types of Scalable Fingers & Key Features
Standard Scalable
• Dimples on the contact
enhance contact force
• Holes for connection to the
PCB help increase solder
strength and reduce wicking
• Locking feature prevents
overstretching
• Contact deflects to the
bottom to help prevent
permanent deformation
• Bent tip prevents hooking
• Radius on both sides of tip
helps remove sharp edges
Side Protected Scalable
• Low force from 0.2N – 1.0N
• To increase strength and
reduce wicking
• Prevents tangled springs
in operator gloves
• Avoids deflection during
PCB transfer
Side Protected
Pre-loaded Scalable
• Very low force from 0.2N – 0.7N
• Oers a family of smaller
working ranges
• Enhanced sidewall design
PAGE 4DATA AND DEVICES /// SPRING FINGERS
Spring Fingers
Product
Number Type Contact
Finish
Uncompressed
Height (mm)
Width
(mm)
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
Current
Capacity
Standard and Ultra Low Profile
1447009-5 Y Gold 0.8 2 0.5A
2040852-1 Y Gold 0.8 2 1.5A
1447360-9 C Gold 1.7 1.5 1.5A
1447360-8 C Gold 1.3 1.2 1.5A
1746136-1 Box Gold 1.5 2 1.5A
1871059-1 C Gold 1.7 1.5 1.5A
1674954-1 Box Gold 2 2 0.5A
1734300-1 C Gold 3 2.5 1.5A
1447009-7 C Gold 3.5 2.5 1.5A
1447009-8 C Gold 3.5 2.5 1.5A
1734303-1 Box Tin-
Copper 4 2.5 1.5A
1437259-6 C Nickel 4 2.5 1.5A
1775073-1 Box Gold 4.3 2.5 1.5A
Product
Number Type Contact
Finish
Uncompressed
Height (mm)
Width
(mm)
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
Current
Capacity
Pre-Loaded
2292838-3 Pre-
loaded Gold 1.1 1 1.5A
1551631-5 Pre-
loaded Gold 1.24 1 0.5A
2134078-1 Pre-
loaded Gold 1.2 1.05 1.5A
2199001-1 Pre-
loaded Gold 1.2 1.05 1.5A
1565158-1 Pre-
loaded Gold 1.45 1.1 1.0A
1-1447360-1 Pre-
loaded Gold 1.4 1 1.5A
1857724-4 Pre-
loaded Gold 1.8 1 1.5A
1551281-4 Pre-
loaded Gold 1.8 1 1.5A
1551401-4 Pre-
loaded Gold 1.8 1 1.5A
1565322-1 Pre-
loaded Gold 1.6 0.75 1.5A
2040761-1 Pre-
loaded Gold 1.99 2 1.5A
1554901-1 Pre-
loaded Gold 2 1.1 1.5A
2289559-1 Pre-
loaded Gold 2.3 1 0.5A
1746854-1 Pre-
loaded Gold 2.4 1.1 1.0A
1827625-1 Pre-
loaded Gold 3 1.4 1.5A
1903646-1 Pre-
loaded Gold 3 1.4 1.5A
2286211-3 Pre-
loaded Gold 2.4 1.7 4.2A
PAGE 5DATA AND DEVICES /// SPRING FINGERS
Spring Fingers
Product
Number Type Contact
Finish
Uncompressed
Height (mm)
Width
(mm)
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.6
Current
Capacity
Scalable
1551572-5 Pre-
loaded Gold 1.8 1.15 0.5A
1551573-5 Pre-
loaded Gold 2.15 1.15 0.5A
1551574-5 Pre-
loaded Gold 2.6 1.15 0.5A
1551575-5 Pre-
loaded Gold 3 1.15 0.5A
1551576-5 Pre-
loaded Gold 3.4 1.15 0.5A
2199248-4 CGold 1 2 2.0A
2199248-5 CGold 1.3 2 2.0A
2199248-6 CGold 1.6 2 2.0A
2199249-3 CGold 2 1.5 2.0A
2199249-4 CGold 2.3 1.5 2.0A
3-2199250-2 CGold 2.9 1.5 2.0A
3-2199250-3 CGold 3.2 1.5 2.0A
3-2199250-4 CGold 3.6 1.5 2.0A
3-2199250-5 CGold 3.8 1.5 2.0A
2108693-4 Pre-
loaded Gold 1.1 1 1.5A
2108610-5 Pre-
loaded Gold 1.4 1 1.5A
2108611-5 Pre-
loaded Gold 1.7 1 1.5A
2108612-5 Pre-
loaded Gold 2.05 1 1.5A
2108613-5 Pre-
loaded Gold 2.4 1 1.5A
2108614-5 Pre-
loaded Gold 2.7 1 1.5A
2108615-5 Pre-
loaded Gold 3 1 1.5A
Product
Number Type Contact
Finish
Uncompressed
Height (mm)
Width
(mm)
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.6
Current
Capacity
2306334-3 Small Gold 1.2 1 1.0A
2329497-1 Small Gold 1.15 1 1.5A
2306654-3 Small Gold 1.8 1 1.0A
2306454-3 Small Gold 2.28 1 1.0A
DATA AND DEVICES /// SPRING FINGERS
Spring Fingers
For More Information
USA: 1.800.522.6752
Canada: 1.905.475.6222
Mexico: 52.0.55.1106.0800
Latin/S. America: 54.0.11.4733.2200
Germany: 49.0.6251.133.1999
UK: 44.0.800.267666
France: 33.0.1.3420.8686
Netherlands: 31.0.73.6246.999
China: 86.0.400.820.6015
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Frequently Asked Questions
Question 1
Why would I use a pre-loaded spring finger
in an application?
Answer 1
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.
Question 2
Which style of spring finger is best for my application?
Answer 2
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.
Question 3
Can I combine dierent types of spring fingers
in an application?
Answer 3
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.
Question 4
What are the benefits of using a scalable spring finger?
Answer 4
Scalable spring fingers use a common footprint,
allowing easy design changes without requiring any
extra space.