In high-voltage and high-current interconnection scenarios, the material selection of the contact interface directly determines the system's reliability, energy efficiency, and service life. The JVT3902 pin and socket interconnection system, with its differentiated plating design—silver plating on the compliant tails of pins and sockets, and gold-plated claw springs in the socket contact area—constructs dual advantages of "high-efficiency conduction + stable contact". Combined with its contact technology and self-alignment function, it has become the preferred solution for board-to-board, busbar-to-board, and busbar-to-busbar connections. This article will focus on the core advantages of the silver plating and gold-plated claw springs, and conduct an in-depth analysis combined with system technical characteristics and application scenarios.

I. Core Plating Technology: Differentiated Value of Silver Plating and Gold-Plated Claw Springs

The plating design of the JVT3902 system is not a simple application of a single material, but a precise match based on the requirements of current transmission paths and contact reliability. The silver plating assumes the core responsibility of "high-efficiency current conduction", while the gold-plated claw springs focus on building a "stable contact interface". The two work together to achieve stable transmission of large currents from 75A to 350A and a maximum voltage of 600V, with a contact resistance as low as 0.20mΩ-0.40mΩ, providing a solid guarantee for high-power scenarios.

1.1 Silver Plating: Core of High-Conductivity and Low-Loss Current Transmission

The main body of the pins and the non-contact ends (compliant tails) of the sockets in the JVT3902 system adopt high-purity silver plating, giving full play to the physical properties and conductive advantages of silver, and becoming the "efficiency cornerstone" of high-current transmission. Its core advantages are reflected in the following three aspects:

Superior Conductive Performance, Reducing Transmission Loss

Silver is the metal material with the best conductivity at room temperature, with a resistivity of only 1.59×10⁻⁸ Ω·m at 20℃, which is far superior to copper (1.72×10⁻⁸ Ω·m) and gold (2.44×10⁻⁸ Ω·m). In the JVT3902 system, the collaborative design of silver plating and gold-plated claw springs demonstrates extreme electrical performance in the 350A high-current scenario with 11mm specifications—through multi-contact current shunting and low-impedance transmission paths, the contact resistance of a single connector is stably maintained at 0.40mΩ when fully loaded at 350A, and the temperature rise is controlled within 30K (far exceeding the 50K limit of the IEC 61984 standard). Taking the new energy vehicle transmission system as an example, when 350A current is transmitted through the system, the power loss of a single node is only 49W (P=I²R=350²×0.40×10⁻³), which is 66.7% more energy-efficient than the 147W loss of traditional tin-plated connectors (with a contact resistance of about 1.2mΩ); combined with the system's low-voltage drop characteristics, it can increase the overall vehicle range by 3%-5%, perfectly adapting to the fast charging and high-power requirements of 800V high-voltage platforms.

Excellent Mechanical Adaptability, Improving Connection Fault Tolerance

Silver has good ductility and flexibility. During the mating process of pins and sockets, its plating layer can adapt to the ±1.00mm radial floating brought by automatic alignment technology, reducing the damage to the contact interface caused by mechanical stress. At the same time, the soft characteristic of the silver plating layer enables it to form a tighter fit with the busbar surface in busbar crimping scenarios (such as knurled crimping process), avoiding local overheating caused by contact gaps. In the vibration environment of industrial robots, this mechanical adaptability can effectively buffer vibration impacts, prevent connection loosening, and ensure continuous power supply.

Balanced Cost-Efficiency, Adapting to Mass Applications

Compared with the full gold-plating scheme, the differentiated design of "silver-plated main body + gold-plated contacts" significantly reduces material costs while ensuring core performance. The market price of silver is much lower than that of gold, and the silver plating process of the JVT3902 system is mature. The uniformity and adhesion of the plating layer have undergone rigorous tests, and can withstand 200 insertion and extraction cycles without plating peeling. This advantage enables it to achieve a balance of "high performance + low cost" in mass application scenarios such as data center servers and energy storage systems, reducing the manufacturing cost of terminal equipment.

1.2 Gold-Plated Claw Springs: Guarantee of Stable and Reliable Contact Interface

The socket contact area of the JVT3902 system adopts a gold-plated claw spring design. Through contact technology, the gold-plated claw springs are integrated into the conical socket to form a multi-contact structure. Its advantages are concentrated in contact stability and environmental adaptability, which is the key to the system's "long-term reliability":

Strong Chemical Stability, Resisting Harsh Environment Erosion

Gold has extremely strong chemical inertness. Within the wide operating temperature range of -40℃ to +125℃, the gold-plated claw springs will not undergo chemical reactions such as oxidation and vulcanization, and can effectively resist oil pollution, humidity changes in industrial environments, and electrolyte vapor corrosion in the battery compartment of new energy vehicles. In the application of charging stations in coastal areas, high humidity and salt spray environments are prone to cause oxidation failure of ordinary connector contacts, while the gold-plated claw springs can achieve more than 5 years of trouble-free operation, greatly reducing maintenance costs.

Stable Low Contact Resistance, Ensuring Long-Term Efficiency

The surface of the gold-plated layer is smooth and has a low friction coefficient, which can reduce contact wear during insertion and extraction and maintain stable contact resistance. The gold-plated claw springs of the JVT3902 system form multi-point conductive channels through a multi-contact beam design (each socket has multiple built-in gold-plated claw springs). Even if a single contact point is slightly worn, the overall contact performance will not be affected. Test data shows that after 200 insertion and extraction cycles, the change rate of the system's contact resistance is less than 5%, which is far better than the industry average standard of 15%. It is especially suitable for long-life cycle equipment such as data center servers and satellite power distribution systems.

Multi-Contact Collaborative Design, Enhancing Current Distribution Capacity

Combined with the claw spring contact technology, the gold-plated claw springs form radially distributed multi-contacts around the pin with an inclined contact beam structure, evenly distributing the current to each contact point and avoiding current overload of a single contact. This design is particularly valuable in 350A high-current scenarios. The 11mm specification connector has 8 built-in gold-plated claw springs. When 350A current passes through, each contact only bears about 44A, which is much lower than the rated bearing upper limit of a single contact (60A), controlling the temperature rise of a single contact within 30K, and effectively avoiding plating melting or material aging caused by local overheating. In high-frequency and high-power start-stop scenarios such as new energy vehicle BUSBAR connections, this current distribution capacity can extend the service life of the connector to more than 10 years/1 million cycles, which is twice that of traditional single-contact connectors; at the same time, the multi-contact redundancy design ensures that even if a certain contact has a slight fault, the system can still maintain more than 90% of the conductive performance, ensuring driving safety. In high-frequency start-stop scenarios such as 5G remote radio units (RRUs), this current distribution capacity can also effectively extend the contact life and reduce the risk of failure caused by local overheating.

II. Synergistic Effect of Plating Advantages and System Technology

The silver plating and gold-plated claw springs of the JVT3902 system do not exist in isolation, but are deeply integrated with the core technologies of the system, forming a synergistic effect of "1+1>2" and further amplifying their application value:

2.1 Integration with Claw Spring Contact Technology: Increasing Power Bearing Upper Limit

The claw spring contact technology maximizes the contact surface area through the conical socket and multi-contact beam design. The low contact resistance characteristics of the gold-plated claw springs and the high conductivity of the silver-plated pins enable the effectiveness of this design to be extremely released in the 350A high-current scenario. The gold-plated claw springs and silver-plated pins of the 11mm specification connector form 8 sets of effective contact pairs, with a total contact area of 15mm². Combined with the high conductivity of silver, an ultra-low impedance path is constructed, so that the system can still maintain a stable contact resistance of 0.40mΩ when 350A current passes through. Compared with the same specification full-silver-plated connector (the contact resistance is likely to rise to 0.6-0.8mΩ at 350A), its power loss is reduced by 33%-50%; combined with the compact structure of the system with a unified height of 10.00mm, it can achieve the dual goals of "high power density + low energy consumption" within the limited installation space of the new energy vehicle BUSBAR, while avoiding accelerated aging of surrounding components caused by excessive heat generation. Even the 3.4mm specification (75A) connector can achieve a low contact resistance of 0.25mΩ at a mating height of only 2.00mm, adapting to the high-density packaging needs of supercomputers.

2.2 Synergy with Guide Post Automatic Alignment Technology: Reducing Mating Damage Risk

The ±1.00mm radial floating function of the guide post automatic alignment technology solves the alignment problem of PCB and busbar mating. The smooth surface of the gold-plated claw springs can reduce the friction resistance during pin mating and reduce plating wear; while the flexibility of the silver-plated pins can buffer the mechanical impact during the mating process, avoiding contact deformation caused by rigid collision. In the dense layout of data center power distribution units (PDUs), this synergistic effect can increase the connector installation qualification rate to more than 99.5%, greatly improving construction efficiency.

III. Core Application Scenarios: Practical Embodiment of Plating Advantages

The advantages of silver plating and gold-plated claw springs are accurately adapted to different application scenarios, becoming a key support for solving high-power connection problems in various fields, especially in the high computing power demand of large data servers and the high-power transmission scenarios of automotive BUSBAR. The specific application performance is shown in the following table:

IV. Market Competitive Advantages and Application Suggestions

4.1 Competitive Differentiation: Plating Design Constructs Technical Barriers

In the current high-power connector market, manufacturers such as TE Connectivity and Amphenol mostly adopt full-silver-plated or full-gold-plated schemes. The differentiated design of "silver plating + gold plating" of the JVT3902 system forms a significant competitive barrier in the 350A high-current scenario: TE's MULTI-BEAM Plus 350A connector has a contact resistance of about 0.55mΩ, and the power loss at 350A reaches 67.375W; Amphenol's EnergyKlip 350A product has a contact resistance of about 0.6mΩ, with a loss of 73.5W; while the 0.40mΩ contact resistance of the JVT3902 system results in a loss of only 49W, which is 27%-33% more energy-efficient than competitors. At the same time, the temperature rise (30K) of the JVT3902 at 350A full load is lower than that of TE (45K) and Amphenol (48K), with better environmental adaptability. Compared with the full-silver-plated scheme, its gold-plated claw springs improve contact stability and environmental adaptability; compared with the full-gold-plated scheme, its silver-plated main body reduces material costs by more than 30%. In the 600V/350A scenario, the comprehensive performance and cost advantages of the JVT3902 system are particularly prominent, making it the preferred choice for new energy vehicle and data center customers.

4.2 Application Selection Suggestions

• Special Verification for      350A High-Current Scenarios: In scenarios above 300A such as electric      vehicle transmission systems and high-power energy storage inverters, it      is necessary to focus on verifying the thickness (JVT3902 standard is      above 3μm) and adhesion of the silver plating layer, and at the same time      verify whether the connector temperature rise is ≤30K when fully loaded at      350A through temperature rise tests to ensure current transmission      efficiency and safety performance.
• Focus on Gold-Plated      Claw Springs in Harsh Environments: In scenarios such as coastal charging      stations and industrial oil-contaminated environments, specifications with      a gold-plated layer thickness of ≥0.75μm at the contact points should be      selected to enhance the ability to resist environmental corrosion.
• Emphasize Process      Stability in Mass Applications: For mass scenarios such as data centers      and servers, it is necessary to verify the consistency of the      manufacturer's silver plating and gold plating processes to avoid      performance fluctuations caused by uneven plating layers.

V. Summary

The silver plating and gold-plated claw spring design of the JVT3902 system is one of its core competencies in the field of high-power interconnection such as 350A. The silver plating constructs an efficient transmission path for 350A high current with "high conductivity, flexibility, and economy", while the gold-plated claw springs ensure long-term reliability of the contact interface with "stability, corrosion resistance, and low loss". Combined with technologies such as claw spring contacts and guide post self-alignment, the system achieves excellent performance of "0.40mΩ low resistance, 30K low temperature rise, and 49W low loss" at 350A full load. This performance effectively solves the pain points of traditional connectors such as "high loss, large temperature rise, and short service life" in scenarios such as new energy vehicle BUSBAR and high-power energy storage inverters, realizing the comprehensive value of "high-power bearing, low-energy consumption transmission, and long-cycle reliability". With the continuous expansion of high-voltage and high-current scenarios, this differentiated plating design will further highlight its technical and market advantages, providing strong support for the performance upgrade of terminal equipment.