spring contacts and battery charging contacts
Standard and customized spring contacts – versatile solutions for your applications
We offer you a comprehensive range of high-quality standard spring contacts and battery charging contacts that are suitable for a wide range of industrial and electronic applications. In our Online Catalog are above you 300 different standard spring contacts and Connectors which you can request directly from us with just a few clicks.
customer-specific spring contacts
In addition, we offer customized adaptations to best meet your individual requirements. This includes modifications to the rated current, spring force and surface coating. Our experienced engineering team will support you in developing customized solutions and offers a variety of material options, special coatings and flexible connector configurations. This way we ensure that your spring contact solution is perfectly tailored to your application.
Spring contacts – Reliable connection technology for versatile applications
Spring contacts, also known as Pogo pins or Spring Loaded Contacts (SLC), are a proven solution for reliable contacting of uneven surfaces. The connection is made by the probing a spring-loaded pinwhich ensures constant electrical contact.
Thanks to their high functional reliability and long service life with high cycle numbers, spring contacts are ideal for power and data transmission. While our standard models cover nominal currents from 1A to 2A, specially developed variants are able to transmit up to 15A. We also enable customer-specific developments to achieve even higher current loads.
Individual spring contact connectors for tailor-made solutions
Spring contact connectors consist of several spring contact pins that are assembled in a plastic housing. We offer customized connector solutions that can be customized in terms of pitch, number of pins and housing dimensions. In addition, we develop magnetic connectors in which the integration of magnets enables a self-guiding and secure connection.
Optimized assembly and automation
For easy and efficient integration we offer different connection types, including SMD, THT, solder cup and crimp connection. In addition, almost all spring contacts can be assembly cap and can be supplied as rolls or belts. This facilitates the automated assembly, reduces assembly time and ensures efficient processing in series production.
With our standard and customized spring contacts, we offer you a flexible, durable and high-performance connection technology that can be perfectly adapted to your specific requirements.
Advantages of spring contacts
- Spring contacts have a long mechanical service life,
- adjustable and measurable spring force,
- small pitch and a high integration density.
- Transmission of high currents up to 15A are possible
- SMD, THT, crimp connections, solder cup for flexible connections
- high tolerance compensation compared to fixed connectors
- good performance in high frequency applications
- RoHs compliant and halogen free
Application of spring contacts
- Battery charging stations and battery compartments of electronic devices such as smartphones, laptops, tablets and cameras
- Connectors in aerospace engineering, eg for avionics systems or satellites
- Medical technology, eg for connecting sensors and actuators in implantable devices or as part of diagnostic and therapy devices
- Industrial applications, eg for connecting sensors, actuators or controls in machines or robots
Reference examples of customer-specific spring contacts
Our customized spring contacts are used in a wide range of applications. Through tailor-made solutions, they meet specific technical requirements and ensure reliable signal and power transmission in a wide variety of industries. Here are some examples of successful customer projects:
design of spring contacts
A spring contact probe consists of three precision-made components that are perfectly matched to each other: a plunger, a spring and a probe body. Together they form a complete, reliable and durable system that ensures a smooth electrical connection.
By using different design constructions, the performance and lifespan of the spring contacts is greatly improved.
standard designs
Back drill design
The back-drill design is particularly suitable for compact designs and at the same time offers a high degree of flexibility in adjusting the spring force. By using a longer spring instead of a hollow piston, the spring forces can be precisely tailored to customer-specific requirements. This enables more precise contact, which at the same time results in a longer service life and optimized mechanical performance in demanding applications.
bias design
The bias design is recommended for maximum contact guarantee and to reduce signal interference caused by vibrations. The piston is bevelled at the end at an angle of up to 18°, which ensures constant, reliable contact. This design is used for almost all spring contact pins with a length of 3,5 mm and above and ensures a stable electrical connection, even in demanding operating environments.
4P design with ball
The 4P design with ball is the ideal solution for applications that have particularly high requirements for current carrying capacity and vibration resistance at currents above 3A. To prevent the compression spring from burning up under high load, a stainless steel ball is integrated between the piston and the compression spring. This design not only ensures even force distribution, but also reduces electrical resistance and increases the service life of the spring contact.
Thanks to this robust construction, the 4P design with ball offers a reliable high-current solution, even under extreme mechanical loads.
4P design with cap
The 5P design with cap is particularly suitable for high-current applications from 4A. Thanks to the reinforced piston shell and a specially developed internal structure, the contact area within the spring contact is enlarged, ensuring stable and reliable current transmission.
In addition, these high-current spring contacts offer a service life of at least 10.000 cycles, making them ideal for high-performance applications where a permanent yet robust connection is required.
Special spring contact designs
Screw design spring contact
The constant miniaturization of electronic devices poses immense challenges for manufacturers and engineers, as more and more functions have to be accommodated in a small space. In this context, manufacturing technology plays a central role in ensuring the performance and reliability of the devices. This is exactly where the spring contact design with integrated screw thread comes into play, as it perfectly meets the requirements of miniaturization.
The design not only enables the transmission of power and signal currents, but also fulfills an important function as a screw. The integration of the screw thread ensures a safe and reliable attachment of the spring contact without the need for additional fastening elements. This saves space and significantly reduces assembly time.
The screw thread can be used on all Flat Type spring contacts from a piston length of 3,5 mm This makes the design extremely flexible and adaptable to the requirements of a wide range of applications.
360° rolling pin spring contact
The Rolling Pin offers a reliable 360° contact between two components - even during lateral and rotating movements. In contrast to a classic spring contact, the rolling pin is equipped with a piston that also has an integrated ball in the pin tip. This ensures a particularly stable and uniform connection.
At the same time, the spring-loaded ball significantly reduces possible transmission interference that could be caused by movements, vibrations or sudden shocks.
In addition, we offer different variants for SMD and THT assembly, so that the rolling pin can be flexibly integrated into different applications. Depending on the pin, the Rated current between 1A and 6A, which ensures a wide range of applications in various industrial sectors.
Coating of spring contacts
As standard, the piston and the pin sleeve are made of brass, while the spring is made of stainless steel. Alternatively, beryllium copper, phosphor bronze and SK4 steel are also available for the manufacture of the pistons. Beryllium copper and phosphor bronze can also be used for the pin sleeve. This allows spring contacts to be specifically adapted to mechanical, electrical and thermal requirements.
To ensure optimum electrical conductivity and high protection against corrosion and oxidation, our spring contacts are coated with gold as standard. The pin sleeve and plunger are usually coated in two steps: first with a 1-2μm thick nickel layer, then with a 0,1-1μm thick gold layer.
In addition, we offer partial coatings individual components as well as alternative precious metal coatings to best meet your specific requirements.
Comparison of individual coatings
| Coating | Hardness (HV) | function (color) |
|---|---|---|
| Gold | 200 | low resistance (gold) |
| Great AP | 400 | highest corrosion resistance, low electrical resistance (silver) |
| Nickel | 150-200 | Corrosion resistance / comp. cheap (silver) |
| Palladium Nickel | 330-380 | Improved signal transmission (silver) |
| brass | 600 | Alternative to nickel (silver) |
| palladium cobalt | 450-600 | Alternative to palladium-nickel (silver) |
| palladium cobalt | 600-800 | Color requirement black |
Comparison to Super AP coating
| Comparison | Test standard | Gold (50u") | Great AP |
|---|---|---|---|
| nickel release | EN12472: 2005 A1: 2009 | Nickel-containing process | nickel-free process |
| impedance | EIA-364-23 | < 50 mΩ | < 50 mΩ |
| salt water Resistance | EIA-362-26 | 96 HR | 168 HR |
| transpiration Resistance | ISO-3160 | 96 HR | 168 HR |
| Oberflächenhärte | ISO6507-1:2005 | 200 HP | 400 HP |
| Electrolysis- resistance time | 1mA, 5V, Pitch=0.60mm | < 1 min | 60 Min |
reference
In the example shown, the connector is equipped with a partial Super-AP coating (silver) for a wearable application. This is to minimize corrosion of the electrical contacts from sweat or moisture. The plug is under the article number SVPC-C-P08945MS1-03A250HR and SVPC-C-P08945FL2-03AHR available. The spring contact plug has a current of 1A and a spring force of 120g. The service life is at least 10.000 cycles.
Connectors with spring contacts
We offer you the manufacture of customer-specific connectors based on spring contacts. Our customized connectors include extra small connectors, waterproof solutions, magnetic connectors and special solutions for high current applications.
In addition, we enable the cost-effective production of complete assemblies with connectors and cable assembly. Our engineers will be happy to support you in the design and development of your assemblies and ensure that all requirements are optimally met.
References of customized connectors
Waterproof connectors with spring contacts
Several spring contacts, even with different working heights, are assembled in a plastic housing to form a customer-specific connector. A common method is to press the individual contacts into the plastic housing IP54 tightness.
For more demanding installation situations in which higher protection classes of IPx7 and higher are required, we offer various connector designs. The pins can be used here O-ring seals supplemented or directly with plastic overmoulded and/or with elastomeric materials sealed become. Due to the overmolding, the connector can individual shape accept and integrate sockets and plug-in devices. This significantly reduces assembly time and assembly costs.
Our waterproof connectors are used in mobile tracking and navigation devices outdoors as well as in medical technology and industry. Please note that the protection class achieved always depends on the installation situation.
Magnetic connectors
In addition to our high current contacts, we also offer the design and manufacture of magnetic connectors with cable assembly. These connectors consist of spring contact pins in combination with a magnetic connection system that enables a shock and vibration resistant and self-guiding connection.
Thanks to the magnetic guide, the plug aligns itself automatically, making plugging in particularly intuitive and user-friendly. The spring contacts not only ensure the reliable transmission of charging current, but also enable the transmission of all types of signals, making them a flexible solution for a wide range of applications.
High current contacts
In the product area of high-current contacts, we offer both standard high-current contacts (5A - 250A) and customer-specific solutions (up to 1000A nominal current).
In addition to spring-loaded miniature battery charging contacts with a current load of 5A to 15A, we also offer so-called “Crown Spring Contacts” with a load capacity of up to 250A. This design ensures 100% contact between plug and socket, creating an extremely stable and vibration-resistant connection. At the same time, the low contact resistance ensures efficient power transmission even under high loads.
Our high-current contacts comply with the current standards, including GB / IEC (China / EU standard) and SAE (US standard). This ensures a safe and standard-compliant solution for a wide range of industrial and automotive applications.
Online Catalog
In our Online Catalog you will find over 300 standard spring contacts and connectors based on spring contacts, which you can request directly from us.
The PDF catalog "Design Guide Spring Contacts" is a comprehensive technical documentation on spring contacts. It provides detailed information on various types of spring contacts, their applications, technical specifications, and customization options.
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