Decision criteria for the right strategy for spring contact connectors
Selecting a suitable connector is a key decision in product development. Spring contact connectors These factors influence not only the electrical function, but also installation space, assembly processes, reliability and the overall cost of a system.
In practice, many companies initially resort to Standard connectors .
However, with increasing demands, the question increasingly arises:
Is a standard solution sufficient – or is a customer-specific spring contact connector technically and economically more sensible?
Standard connectors: Fast availability and low entry costs
Standard connectors offer particular advantages in early developmental phases They offer clear advantages. They are available at short notice, relatively inexpensive, and can be used without additional development effort. Therefore, they are ideal for prototypes, smaller production runs, or applications with manageable requirements. a pragmatic and often sensible choice period.
However, this decision is often based on the assumption that the connector merely establishes a connection – and not as a... integral part of the overall system must be considered.
Standard solutions offer clear advantages, especially in early development phases:
- short term availability
- low unit costs
- no development costs
Limitations of standard spring contact connectors
Our preview of increasing complexity Standard solutions quickly reach their limits:
- Adapting the design to the connector
- increased space requirements
- additional assembly effort
- Use of adapters and additional components
Also with regard to the Contact and long-term stability Standard solutions are not always optimally designed. This results in constructive compromises that can negatively impact reliability, serviceability, and costs in the long run.
Another limitation concerns, in particular, the use of spring contacts. With standard solutions, Number and Type of spring contacts fixedIndividual requirements such as:
- different spring forces
- special contact geometries
- combined signal and power transmission
- Special coatings
can only be implemented to a limited extent.
Customized spring contact connectors: Integration instead of compromise
Custom connectors take a different approach:
The application is not adapted to the connector, but the connector is adapted to the application.
This approach offers the following advantages:
- Reduction of components and interfaces
- simplified assembly processes
- better integration into assemblies
- Higher system reliability
Another advantage lies in the design freedom.:
Connector housings can take on almost any shape and precisely adapted to existing installation spaces. High protection requirements, for example, can also be met. Seals up to IP68, can be implemented in a targeted manner. Furthermore, the Number of contacts can be defined individually, whereby also different spring contact types can be combined within a single housing.
In addition to constructive advantages, there are also positive effects on process reliability and reproducibility in series production.
Especially at Spring contact solutions This creates significant added value. direct integration into housings or complete assemblies.
Performance of spring contact connectors
While standard solutions are typically designed for Rated currents from 1 A to 2 A are designed to accommodate custom-developed spring contact connectors significantly higher performance transferred. Depending on the selected spring contactDepending on the design, contact geometry, and material selection, currents of up to 15 A per pin are achievable. It is also possible to... Spring force of the contact pin to be specifically tailored to the respective application.
Custom spring contact connectors enable:
- Currents up to 15 A per pin
- targeted adjustment of the spring force
- optimized contact geometries
Furthermore, various technical designs are available. These include solutions with rolling pin spring contacts and variants with direct cable connection.
Materials and coatings as a decisive factor
Influence of surface coatings on galvanic corrosion
Another difference between standard and custom connectors lies in the selection of materials and surfaces.
While standard solutions usually come with a Gold plating as standard surface finish Custom-designed solutions allow for targeted adaptation to actual operating conditions. Especially under high mechanical stress or demanding environments, the right coating is crucial for long-term contact reliability.
Modern Special coatings such as Super AP They are specifically designed for applications with high mechanical and electrical demands. They reduce wear, improve corrosion resistance, and ensure stable electrical properties throughout their entire service life.
This makes the coating a key design parameter – and not merely a standard feature.
Magnetic connectors with spring contacts
Spring contacts offer a particularly suitable basis for implementation magnetic connector systems. Their design properties allow for simple and efficient implementation of magnetically guided connections without the need for complex mechanical plugging mechanisms.
The combination of magnetic guides and spring contacts enables self-adjusting, tolerance-compensating contact. This reduces both the design effort and the mechanical stress during the mating process.
Such solutions are particularly suitable for applications with frequent mating cycles, limited installation space, or increased user-friendliness requirements. At the same time, the contacts can be integrated into housing and assembly designs.
Advantages of magnetic connector systems:
- self-adjusting contact
- Compensation for mechanical tolerances
- reduced insertion forces
- improved ease of use
Magnetic connector systems are particularly suitable for:
- Applications with frequent mating cycles
- limited construction space
- ergonomic requirements
Economic efficiency: Total costs instead of unit price
The evaluation of connectors should always be based on the Total cost of ownership (TCO) respectively.
While standard solutions may initially impress with their low unit price, the true costs often only become apparent when considering assembly, logistics, and quality assurance. Custom connectors, despite higher initial development costs, can offer economic advantages by simplifying processes, reducing potential errors, and decreasing system complexity.
Standard solutions:
- low unit price
- but often higher system costs
Customized solutions:
- higher initial costs
- Savings achieved through:
- Installation
- Construction space
- Logistics
- Quality Control
Economical even with medium production volumes
A common misconception: Custom connectors only become worthwhile with large production runs.
It is often assumed that customized solutions only become worthwhile at very high volumes. In practice, however, it turns out that economic advantages can be realized even at medium production volumes. Typical project volumes for customized connectors often start in the Range of approximately 1.000 piecesHowever, depending on the complexity and requirements, Even smaller series can be implemented effectively. will be – especially in technically demanding applications where the functional advantages outweigh the disadvantages.
practical example
The tooling costs for a custom 18-pin spring-loaded connector with a unique housing shape and integrated plug-in spring contacts were just under €5.000. With a minimum order quantity of 1.000 units, this results in a unit price of €13,22, which decreases accordingly for larger quantities (e.g., €11,08 for 3.000 units or €10,09 for 5.000 units).
This example shows that customer-specific solutions can be economically viable even for medium production volumes – especially when additional savings in assembly, installation space and system integration are taken into account.
18-pin custom spring contact connector:
- Tooling costs: approx. €5.000
- 1.000 pieces: €13,22 / piece
- 3.000 pieces: €11,08 / piece
- 5.000 pieces: €10,09 / piece
Additional savings through:
- reduced assembly times
- smaller installation space
- fewer components
Conclusion: The application is decisive
The decision between standard and custom connectors should not be made categorically. While standard solutions often provide a sensible starting point, customized concepts offer significant advantages when integration, reliability, and cost-effectiveness are the focus.
Ultimately, what matters is not the spring contact connector itself, but how well it suits the specific application.
The crucial point is: How well does the spring contact connector suit the application?
Since connectors are often used unchanged for years, it is worthwhile to regularly check existing solutions.
Even based on drawings, specifications or samples, it is possible to assess whether a standard solution is still suitable or whether a customer-specific design offers technical and economic advantages.
Checklist: Is your connector optimally designed for your application?
Use the following questions as a decision-making aid to determine whether a standard solution is sufficient or whether a custom development makes sense.
Requirements & Operating Conditions
- Are all electrical requirements (current, voltage, signal) clearly defined?
- How many insertion cycles can be expected during the product lifecycle?
- What environmental conditions affect the connector (temperature, humidity, vibration)?
Mechanics & Integration
- Is the available installation space being used optimally?
- Does the connector need to be integrated into a housing?
- Are there any tolerances or movements that need to be taken into account?
Assembly & Processes
- What is the current assembly effort?
- Can the number of components or interfaces be reduced?
- Is the solution suitable for automated manufacturing?
Cost effectiveness
- Are only unit costs considered – or the total cost of ownership (TCO)?
- Are there potential savings in assembly, logistics, or quality assurance?
- Is it possible to simplify the supply chain?
Optimization potential
- Has a customer-specific alternative already been considered?
- Is the application adapted to the connector – or vice versa?
- Are there any functional limitations imposed by the current solution?
We are available Development partner and supplier for customized HMI solutionsWe specialize in electromechanical assemblies, connectors, and spring contact solutions. We support our customers from the concept phase to series production and offer both a broad portfolio of standard components and extensive experience in developing customized solutions.
A particular focus is on integrating components into existing systems in order to specifically optimize installation space, assembly effort and system costs.
We would be happy to analyze your existing connector solution or work with you to develop a technically and economically optimal alternative. You will receive a sound initial assessment based on drawings, specifications, or samples.
