1447009-8

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 helping to prevent 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 address 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 effective 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 0.8mm and up to 7mm • Requires limited space on a PCB • Accommodates soldering and pick-and-place using standard equipment Benefits • Helps to prevent EMI noise and static • Provides a well grounded connection • Provides an easier and cost effective 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 DATA AND DEVICES / SPRING FINGERS 2 APPLICATIONS AND INDUSTRIES The internet of things (IoT) technology functions as a global infrastructure for the information society, enabling advanced services to interconnect devices based on existing and evolving communications technologies. Also, it offers operational information and the ability to communicate independently without human intervention. As a result, the technology is expected to open up new revenue streams, drive business efficiencies, facilitate new business models, and improve the way existing services are delivered across many different sectors. Consumer Electronics Industrial / Automotive Medical Application • Smart Home Electronics • POS Scanners • Patient Monitoring Devices • Fitness Equipment • Security Systems • Blood Glucose Monitors • Gaming Consoles • Thermostats • Hearing Aids • Wearable Devices • Backup Cameras • Smart Healthcare • Home Entertainment Systems • GPS • Payment Terminals • Satellite Radio • Tablets • Infotainment • Mobile Phones • Rugged Tablet/Phone • Smart Building • Fleet Telematics a b Medical Device PCB Used for grounding or shielding on the PCB DATA AND DEVICES / SPRING FINGERS 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 3 TYPES OF SPRING FINGERS Standard-flat Contact Box Pre-loaded Contact C Standard box and C type connectors both have simple geometry for easier application. Ultra-low Profile Pre-loaded Pre-loaded spring fingers are useful 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 Small Y 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 • Helps prevent 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 • Helps to avoid deflection during PCB transfer • Contact deflects to the bottom to help prevent permanent deformation • Bent tip can prevent hooking • Radius on both sides of tip helps remove sharp edges DATA AND DEVICES / SPRING FINGERS 4 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 4.2 4.25 4.5 4.9 5.1 6 Current Capacity Width (mm) Working Range Length (mm) Uncom-pressed Height (mm) Contact Finish Type Product Number Standard and Ultra low profile Y Gold 0.8 2.0 3.4 0.5A Y Gold 0.8 2.0 3.4 1.5A C Gold 1.7 1.5 2.7 1.5A C Gold 1.3 1.2 4.5 1.5A Box Gold 1.5 2.0 3.4 1.5A C Gold 1.7 1.5 2.7 1.5A Box Gold 2.0 2.0 4.5 1.5A C Gold 3.0 2.5 4.5 1.5A C Gold 3.5 2.5 4.5 1.5A C Gold 3.5 2.5 4.5 1.5A Box Tin4.0 2.5 4.1 Copper 1.5A C Nickel 4.0 2.5 7.0 1.5A 1447009-5 2040852-1 1447360-9 1447360-8 1746136-1 1871059-1 1674954-1 1734300-1 1447009-7 1447009-8 1734303-1 1437259-6 Box Gold 4.0 1.8 5.8 1A Box Gold 4.3 2.5 4.0 4.5A C Gold 5.0 2.5 7.0 2.0A Box Gold 6.0 2.5 4.0 2.0A C Gold 7.0 2.5 7.0 2.0A 2343297-2 1775073-1 440423-1 2339640-1 1734298-1 DATA AND DEVICES / SPRING FINGERS 5 1.1 1 2.7 1.5A 1 2.91 0.5A Length (mm) Working Range 0.4 0.5 0.6 0.65 0.7 0.75 0.8 0.9 1 1.1 1.15 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 4 4.5 Current Capacity Width (mm) PreGold Loaded Uncom-pressed Height (mm) Contact Finish Type Product Number Pre-Loaded 2292838-3 PreGold 1.24 Loaded 1551631-5 PreGold Loaded 1.2 1.05 2.4 1.5A PreGold Loaded 1.2 1.05 2.4 1.5A PreGold 1.45 Loaded 1.1 3.1 1.0A PreGold Loaded 1.4 1 3.5 1.5A PreGold Loaded 1.8 1 3.31 1.5A PreGold Loaded 1.6 0.75 3.2 1.5A PreGold Loaded 2 1.1 3.15 1.5A PreGold 2.3 Loaded 1 3.5 0.5A PreGold 2.4 Loaded 1.1 3.5 1.0A PreGold Loaded 3 1.4 4.4 1.5A PreGold Loaded 3 1.4 4.35 1.5A 1.7 4 5.5A 2134078-1 2199001-1 1565158-1 1-1447360-1 1857724-4 1565322-1 1554901-1 2289559-1 1746854-1 1827625-1 1903646-1 PreGold 2.4 Loaded 2286211-3 DATA AND DEVICES / SPRING FINGERS 6 0.4 0.5 0.6 0.65 0.7 0.8 0.87 0.9 0.95 1 1.1 1.2 1.3 1.4 1.45 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 Current Capacity Length (mm) Working Range Width (mm) Uncom-pressed Height (mm) Contact Finish Type Product Number Scalable "PreGold 1.8 1.15 3.26 Loaded" 0.5A "PreGold 2.15 1.15 3.26 Loaded" 0.5A "PreGold 2.6 1.15 3.26 Loaded" 0.5A "PreGold Loaded" 1.15 3.26 0.5A "PreGold 3.4 1.15 3.26 Loaded" 0.5A "PreGold 3.8 1.15 3.26 Loaded" 0.5A 1551572-5 1551573-5 1551574-5 3 1551575-5 1551576-5 2388202-2 Y Gold Y 1 2 3.9 2.0A Gold 1.3 2 3.9 2.0A Y Gold 1.6 2 3.9 2.0A C Gold 1.5 3.2 2.0A C Gold 2.3 1.5 3.2 2.0A C Gold 2.9 1.5 3.45 2.0A C Gold 3.2 1.5 3.45 2.0A C Gold 3.6 1.5 3.45 2.0A C Gold 3.8 1.5 3.45 2.0A 2199248-4 2199248-5 2199248-6 2 2199249-3 2199249-4 3-2199250-2 3-2199250-3 3-2199250-4 3-2199250-5 DATA AND DEVICES / SPRING FINGERS 7 Uncom-pressed Height (mm) "PreLoaded" Gold 1.1 1 2.5 1.5A "PreLoaded" Gold 1.4 1 2.9 1.5A "PreLoaded" Gold 1.7 1 2.9 1.5A "PreLoaded" Gold 2.05 1 2.9 1.5A "PreLoaded" Gold 2.4 1 2.9 1.5A "PreLoaded" Gold 2.7 1 2.9 1.5A "PreLoaded Gold 1 2.9 1.5A Current Capacity Width (mm) Working Range Length (mm) Type Product Number Contact Finish Scalable (Continuation) 0.4 0.5 0.6 0.65 0.7 0.8 0.87 0.9 0.95 1 1.1 1.2 1.3 1.4 1.45 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 2108693-4 2108610-5 2108611-5 2108612-5 2108613-5 2108614-5 3 2108609-5 Uncom-pressed Height (mm) Width (mm) Gold 1.2 1 2 1.0A Small Gold 1.15 1 2.7 1.5A Small Gold 1.8 1 2.4 1.0A Small Gold 2.28 1 2.4 1.0A Small Gold 1.45 1 1.7 1.5A Length (mm) Working Range 0.4 0.5 0.6 0.7 0.75 0.8 0.9 1 1.1 1.15 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 Current Capacity Contact Finish Small Type Product Number Ultra Small 2306334-3 2329497-2 2306654-3 2306454-3 2336713-2 DATA AND DEVICES / SPRING FINGERS 8 FREQUENTLY ASKED QUESTIONS Questions Answers 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 easier design changes without requiring any extra space. What are spring fingers’ key specifications a designer needs to know for their development? Basically the key specifications would be uncompressed height te.com TE Connectivity, TE Connectivity (logo) and TE are trademarks owned or licensed by the TE Connectivity family of companies. All other logos, products and/or company names referred to herein might be trademarks of their respective owners. The information given herein, including drawings, illustrations and schematics which are intended for illustration purposes only, is believed to be reliable. However, TE Connectivity makes no warranties as to its accuracy or completeness and disclaims any liability in connection with its use. TE Connectivity‘s obligations shall only be as set forth in TE Connectivity‘s Standard Terms and Conditions of Sale for this product and in no case will TE Connectivity be liable for any incidental, indirect or consequential damages arising out of the sale, resale, use or misuse of the product. Users of TE Connectivity products should make their own evaluation to determine the suitability of each such product for the specific application. ©2022 TE Connectivity. All Rights Reserved. 12/22   Original DATA AND DEVICES / SPRING FINGERS