Contact Springs and Contact Parts
Reliable connectivity, always
Stamped and multislide metal parts, plated contacts, and springs engineered for consistent conductivity in high-performance electronic systems.
RPK Group’s contact springs and parts are metal components dedicated to ensuring reliable electrical connectivity in your systems. Our product range extends from precision-stamped and multislide parts to spring contacts plated in gold, silver, or nickel, each engineered always to maintain conductivity. Typical applications include connectors in smart vehicles and advanced automotive systems (from ADAS to brake-by-wire), as well as data center hardware and other cutting-edge technologies.
For the most demanding conditions, we also provide canted coil springsthat maintain connectivity even in extreme environments. Each coil in a canted spring acts as a contact point, providing continuous electrical contact around its circumference.
Advantages and benefits of contact springs
- Our contact springs and parts work in static or dynamic electrical applications, ensuring reliable connections even under shock and vibration.
- Plating (gold, silver, nickel, etc.) makes these contact components more effective in humid or corrosive environments, or any application requiring higher conductivity.
- High-precision manufacturing (with features such as laser-welded spring ends) ensures consistent quality and performance.
Types of contact springs and contact parts
Measures
- Wire diameter: 0.10-2 mm (0.004-0.08 in)
- Other dimensions as required
Materials
The choice of the right material, surface treatment and coating are critical for the final quality and safety of the product. From stainless steels to the most specific materials bought in from the best suppliers.
- Carbon steel
- Stainless steel
- Inconel
- Elgiloy
- Hastelloy
- Chrome silicon
- Copper
- Other materials according to your special requirements
- Coatings: silver, gold, nickel... (from 0.5 μm to 10 μm)
Industries / Applications
Automotive
Medical
Electric
Industrial
E-Mobility
Power Tools
Consumer Goods
Other Industries
Bike and eBike
Frequently Asked Questions
What is a contact spring?
A contact spring is a spring whose primary function is to establish and maintain reliable electrical contact between two surfaces. The spring force keeps the contact surfaces pressed together, ensuring a consistent, low-resistance connection throughout the product's service life. Contact springs are found in battery compartments, circuit board mounting clips, connector pins, and EMI shielding gaskets.
What are contact springs and contact parts used for?
Reliable electrical and signal connections in connectors, sensors, and electrical assemblies. We design the spring force and contact surface for low, stable resistance.
What materials are used for contact springs?
Contact springs are manufactured in copper alloys (phosphor bronze, beryllium copper), stainless steel with conductive plating, and specialized alloys such as Elgiloy. Plating with gold, silver, or nickel controls contact resistance, protects against tarnishing, and extends service life in humid or corrosive environments.
What automotive and EV applications use contact springs?
Battery terminal contact springs, BMS (battery management system) cell-to-cell connectors, charging port contacts, CAN bus and LIN bus connector elements, and motor hall sensor contacts all use precision contact springs. In EVs, contact springs must maintain low resistance over temperature cycles from -40°C to +125°C and under continuous vibration.
What consumer electronics applications use contact springs?
Contact springs are standard components in smartphones (SIM card holders, battery contacts), laptops (docking station connections), cordless headphones (charging contacts), smart watches (magnetic charging), and remote controls (battery contacts). RPK Group manufactures these at scale for major consumer electronics supply chains.
Do contact springs require clean room manufacturing?
Precision contact parts for automotive, medical devices, optical instruments, and certain aerospace applications require clean room assembly. RPK Group operates cleanroom facilities for contact spring production where particle-contamination or surface-cleanliness requirements apply.
Get the most out of our expertise
Our engineers work alongside our customers to find the best solution for them, applying scientific methods and knowledge accumulated over almost 50 years.
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