How to Choose Right High-Reliability Press-Fit Connectors?-ELETE | Professional Connector Manufacturer

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How to Choose Right High-Reliability Press-Fit Connectors?

Nov 03,2026

Lower Costs, Higher Efficiency, and Fearless of Harsh Environments: How to Correctly Select High-Reliability Press-Fit Connectors? — Join Hands with ELETE to Embrace a New Era of Solderless Connection

In modern electronics manufacturing, automotive electronics (such as EV SiC and IGBT power modules), industrial control, and new energy energy storage systems, traditional soldering processes are plagued by thermal stress damage, cold solder joints, and limited production efficiency. Press-Fit Connectors (Fish-Eye Connectors), with their unique technological advantages of being "solderless, highly gas-tight, and vibration-resistant," are rapidly becoming the preferred solution in high-end manufacturing.

As a professional manufacturer of precision connectors, ELETE relies on deep technical strength and a strict quality management system (certified to ISO 9001 and IATF 16949) to provide global customers with a full range of high-quality press-fit and board-to-board connector solutions. Facing a market filled with diverse options, how can you correctly select the right press-fit connector for a specific project?

Step 1: Precisely Match Application Scenarios and Electrical Performance

Different application scenarios have drastically different requirements for current-carrying capacity, voltage rating, and signal integrity. At the beginning of selection, the following dimensions must be clearly defined:

Power & High-Current Applications (e.g., Automotive SiC & IGBT Modules, Inverters): These scenarios require connectors with ultra-low, stable contact resistance and excellent high-current carrying capabilities. To address these needs, ELETE has developed specialized IGBT Power Module Press-Fit Terminals, which effectively withstand the thermal shocks and high current transmission caused by high-power switching, eliminating the failure risks associated with traditional solder aging.
Signal Transmission & High-Density Applications: For high-frequency or space-constrained PCBs, attention must be paid to impedance matching and the pin geometry to ensure signal integrity while maximizing board space usage.

Step 2: Select Press-Fit Configurations Based on Circuit Topology (Single, Dual, and Multi-Fish-Eye)

ELETE offers a variety of terminal structural forms tailored to different circuit interconnection requirements and board-to-board / module-to-module connection topologies. Design engineers should select the appropriate option based on physical layouts and electrical parallel paths:

Single Press-Fit Zone Terminals: The most basic and widely used form, featuring a flexible "fish-eye" press-fit zone on one end inserted into the PCB, and a pin or wiring terminal on the other end. Suitable for standard board-to-cable or board-to-socket connections.
Dual / Double Eye-of-the-Needle Terminals: Featuring "fish-eye" press-fit zones on both ends, enabling solderless direct board-to-board (B2B) rigid connections between two PCBs. Eliminating the need for plastic headers/receptacles drastically reduces module spacing, making it ideal for highly integrated powertrain/three-electric systems and micro-controllers.
Multi-Fish-Eye Terminals (e.g., 4-Fish-Eye Terminal Arrays/Modules): Integrating 4 or more press-fit zones into a single structure, these are suitable for multi-channel parallel power supply, current shunting, multi-signal synchronous transmission, or high-vibration scenarios requiring extreme physical retention. Distributed multi-point press-fitting not only significantly enhances mechanical retention strength but also effectively distributes large currents, reducing localized heating.

Step 3: Master PCB Design and Compliant Zone Dimensions

The core principle of a press-fit connector lies in its elastic "fish-eye" structure, which undergoes compliant deformation when pressed into a PCB plated through-hole (PTH), forming a high-retention-force, gas-tight cold weld joint. Therefore, PCB matching design is critical:

Hole Diameter & Tolerance Matching: Strictly refer to the technical data sheets on ELETE’s official website to ensure that the PCB drill diameter, copper thickness, and surface finish (such as ENIG, HASL, etc.) perfectly match the compliant zone dimensions of the press-fit terminal. A hole that is too large will lead to insufficient retention force and poor contact; a hole that is too small may damage the copper foil inside the PTH wall during press-in.
Insertion & Retention Force Testing: Verify that the press-in tooling on the assembly line matches the specified Insertion Force and Retention Force of the terminal to prevent overloading and component damage.

Step 4: Evaluate Mechanical Strength and Environmental Endurance

High-end electronic devices often operate in harsh environments featuring severe vibration and extreme temperature fluctuations (e.g., automotive engine compartments, industrial robots, and energy storage cabinets).

Vibration & Mechanical Shock Resistance: Superior press-fit connectors rely on adaptive elastic recovery, preventing loosening or fretting corrosion even under prolonged high-frequency vibration. ELETE press-fit terminals undergo rigorous mechanical shock testing to guarantee stable and reliable electrical performance.
Thermal Resistance & Anti-Aging: The solderless process eliminates thermal fatigue cracking associated with solder joints from the root. ELETE products comply with strict industry standards, ensuring long-term mechanical and electrical stability across wide temperature cycles (e.g., -40℃ to +125℃ or higher).

Step 5: Why Trust ELETE connector?

As an industry-leading precision connector manufacturer, ELETE holds key advantages in Press-Fit technology:

•Rigorous Quality Assurance: Fully certified to ISO 9001 and automotive IATF 16949 quality management systems, providing reliability for automotive, industrial, and energy-grade applications.

•Rich Product Portfolio: Covering single fish-eye, dual fish-eye board-to-board terminals, multi-fish-eye arrays, and heavy-duty IGBT module press-fit pins, comprehensively meeting signal and power transmission needs.

•Strong Customization Capabilities: In addition to standard product offerings, ELETE can provide customized press-fit connector solutions tailored to specific structural designs, pin counts, and automated production lines.

Correctly selecting the structural form and specifications of press-fit connectors is not only vital to individual component performance, but also serves as the linchpin to achieving high integration, superior reliability, and lower overall manufacturing costs across the entire system. ELETE, backed by outstanding press-fit manufacturing processes and rich industry experience, stands ready to provide you with the most professional connectivity support.

To obtain detailed product specifications, 3D models, or customized selection consulting, please visit the ELETE Official Website. Let us partner together to build an efficient, reliable, solderless electrical connection future!