1734303-1

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 offering 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 DATA AND DEVICES /// SPRING FINGERS Benefits Applications • Prevents EMI noise and static • Mobile phones • Provides a highly reliable connection • Wearable devices • Provides an easy and inexpensive method for connecting multiple PCBs • Tablets • Allows for versatility in PCB layout • Provides flexible, quick-turn design-ins • Does not require expensive, specialized application equipment • Game consoles • Patient monitoring devices • POS scanners • Security systems • GPS devices Applications and Industries Consumer Electronics Industrial / Automotive Consumer Electronics • Smart Home Electronics • POS Scanners • Patient Monitoring Devices • Fitness Equipment • Security Systems • Blood Glucose Monitors • Gaming Consoles • Thermostats • Hearing Aids • Wearable Devices • Backup Cameras • Home Entertainment Systems • GPS • Payment Terminals • Satellite Radio • Tablets • Infotainment • Mobile Phones • Rugged tablet/phone • Printer • VR Device a b Tablet PCB a. Used for grounding or shielding on the PCB b. Used for an antenna feed Medical Device PCB Used for grounding or shielding on the PCB Wearable Device PCB Used for grounding between the PCB and the cover of the device DATA AND DEVICES /// SPRING FINGERS PAGE 2 Types of Spring Fingers Standard-flat Contact Box Pre-loaded Contact C Standard box and C type connectors both have simple geometry for easy application. Pre-loaded 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. Ultra-small Contact Ultra-low Profile Y Small Ultra low profile, Y type spring fingers are used in applications where low effective heights are needed. Offered in different heights and styles/form factors, ultra small spring fingers are used in a broad range of applications with space constraints across various industries. Types of Scalable Fingers & Key Features Standard Scalable Side Protected Scalable • Dimples on the contact enhance contact force • Low force from 0.2N – 1.0N • Holes for connection to the PCB help increase solder strength and reduce wicking • Locking feature prevents overstretching • To increase strength and reduce wicking • Prevents tangled springs in operator gloves Side Protected Pre-loaded Scalable • Very low force from 0.2N – 0.7N • Offers a family of smaller working ranges • Enhanced sidewall design • Avoids deflection during PCB transfer • Contact deflects to the bottom to help prevent permanent deformation • Bent tip prevents hooking • Radius on both sides of tip helps remove sharp edges DATA AND DEVICES /// SPRING FINGERS PAGE 3 Pre-Loaded Standard and Ultra Low Profile Spring Fingers Type 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 4 2.5 1.5A 1734303-1 Box Contact Uncompressed Width Finish Height (mm) (mm) Working Range Product Number TinCopper 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 4 4.5 Current Capacity 1437259-6 C Nickel 4 2.5 1.5A 1775073-1 Box Gold 4.3 2.5 1.5A 2339640-1 Box Gold 6.0 2.5 2.0A 440423-1 Gold 5.0 2.5 2.0A C Product Number Type 2292838-3 Working Range Contact Finish Uncompressed Height (mm) Width (mm) Preloaded Gold 1.1 1 1.5A 1551631-5 Preloaded Gold 1.24 1 0.5A 2134078-1 Preloaded Gold 1.2 1.05 1.5A 2199001-1 Preloaded Gold 1.2 1.05 1.5A 1565158-1 Preloaded Gold 1.45 1.1 1.0A 1-1447360-1 loaded Pre- Gold 1.4 1 1.5A 1857724-4 Preloaded Gold 1.8 1 1.5A 1565322-1 Preloaded Gold 1.6 0.75 1.5A 2040761-1 Preloaded Gold 1.99 2 1.5A 1554901-1 Preloaded Gold 2 1.1 1.5A 2289559-1 Preloaded Gold 2.3 1 0.5A 1746854-1 Preloaded Gold 2.4 1.1 1.0A 1827625-1 Preloaded Gold 3 1.4 1.5A 1903646-1 Preloaded Gold 3 1.4 1.5A 2286211-3 Preloaded Gold 2.4 1.7 4.2A DATA AND DEVICES /// SPRING FINGERS 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 Current Capacity PAGE 4 Ultra-Small Scalable Spring Fingers Contact Uncompressed Width Finish Height (mm) (mm) Working Range Product Number Type 1551572-5 Preloaded Gold 1.8 1.15 0.5A 1551573-5 Preloaded Gold 2.15 1.15 0.5A 1551574-5 Preloaded Gold 2.6 1.15 0.5A 1551575-5 Preloaded Gold 3 1.15 0.5A 1551576-5 Preloaded Gold 3.4 1.15 0.5A 2199248-4 C Gold 1 2 2.0A 2199248-5 C Gold 1.3 2 2.0A 2199248-6 C Gold 1.6 2 2.0A 2199249-3 C Gold 2 1.5 2.0A 2199249-4 C Gold 2.3 1.5 2.0A 3-2199250-2 C Gold 2.9 1.5 2.0A 3-2199250-3 C Gold 3.2 1.5 2.0A 3-2199250-4 C Gold 3.6 1.5 2.0A 3-2199250-5 C Gold 3.8 1.5 2.0A 2108693-4 Preloaded Gold 1.1 1 1.5A 2108610-5 Preloaded Gold 1.4 1 1.5A 2108611-5 Preloaded Gold 1.7 1 1.5A 2108612-5 Preloaded Gold 2.05 1 1.5A 2108613-5 Preloaded Gold 2.4 1 1.5A 2108614-5 Preloaded Gold 2.7 1 1.5A 2108615-5 Preloaded Gold 3 1 1.5A Product Number Type 2306334-3 Small Gold 1.2 1 1.5A 2329497-2 Small Gold 1.15 1 1.0A 2306654-3 Small Gold 1.8 1 1.5A 2306454-3 Small Gold 2.28 1 1.0A 2336713-2 Small Gold 1.45 1 1.0A Contact Uncompressed Width Finish Height (mm) (mm) DATA AND DEVICES /// SPRING FINGERS 0.40.5 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 Working Range 0.40.5 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 Current Capacity PAGE 5 Spring Fingers Frequently Asked Questions Question 1 Why would I use a pre-loaded spring finger in an application? Question 3 Can I combine different types of spring fingers 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. 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 2 Which style of spring finger is best for my application? Question 4 What are the benefits of using a scalable spring finger? 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. Answer 4 Scalable spring fingers use a common footprint, allowing easy design changes without requiring any extra space. For More Information te.com TE Connectivity, TE, TE Connectivity (logo) are trademarks owned or licensed by the TE Connectivity Ltd. family of companies. All other logos, products and/or company names referred to herein might be trademarks of their respective owners. ©2020 TE Connectivity Ltd. family of companies. All Rights Reserved. 6-1773460-8  02/20   DND DATA AND DEVICES /// SPRING FINGERS USA: Canada: Mexico: Latin/S. America: Germany: UK: France: Netherlands: China: 1.800.522.6752 1.905.475.6222 52.0.55.1106.0800 54.0.11.4733.2200 49.0.6251.133.1999 44.0.800.267666 33.0.1.3420.8686 31.0.73.6246.999 86.0.400.820.6015