Product Introduction
High-power relay contacts are core conductive components used within high-current relays, contactors, and switchgear to perform circuit connection, current-carrying, and interruption functions.
These products are manufactured from silver-based composite materials-such as AgSnO₂, AgNi, AgCu, and AgW-using processes including powder metallurgy, internal oxidation, precision forming, and welding. They are widely used in sectors such as new energy vehicles, energy storage systems, charging equipment, industrial control, and power distribution.
Technical Specifications
|
Material System |
Typical Hardness (HV) |
Typical Density (g/cm³) |
Conductivity (%IACS) |
Recommended Applications |
|
AgSnO₂ (10–12) |
80–110 |
9.7–10.0 |
65–75 |
EV relays, energy storage contactors, DC switching applications |
|
AgNi (10) |
75–100 |
10.0–10.3 |
75–85 |
Industrial control relays, power switching devices |
|
AgW (50) |
140–180 |
12.5–13.0 |
40–50 |
High-current contactors, circuit breakers, heavy-duty switching |
|
AgCu (3) |
70–90 |
10.1–10.4 |
80–90 |
General-purpose relays, low-voltage distribution equipment |
Product Features
Excellent Arc Erosion Resistance
Utilizing arc-resistant material systems such as AgSnO₂ and AgW, and optimizing oxide distribution and microstructure, these materials effectively minimize arc erosion and material loss, thereby extending electrical service life under high-frequency switching conditions.
Stable Electrical Conductivity
Optimized processes for powder preparation, sintering, and precision machining enhance material microstructural uniformity, ensuring stable contact performance and minimizing contact resistance fluctuations during long-term operation.
Superior Resistance to Contact Welding
Refractory components within the silver-based composite material effectively inhibit contact welding caused by high-current surges, inductive loads, and short-term overloads, enhancing operational safety for relays.
Support for Diverse Structural Configurations
Available in various forms-including rivet contacts, flat contacts, shaped contacts, and contact assemblies-these products support integrated assembly solutions with carriers such as copper strips and spring blades, meeting diverse product design requirements.
Manufacturing Process and Quality Control
Raw Material Control
High-purity silver-based materials and metal oxide powders are selected; chemical composition, particle size distribution, and impurity levels are rigorously inspected.
Precision Batching and Mixing
Materials are precisely proportioned according to specific material systems; automated mixing processes enhance material uniformity and minimize batch-to-batch variation.
Powder Metallurgy and Internal Oxidation
Silver-based composite materials are produced via powder metallurgy sintering or internal oxidation processes to improve microstructural density and arc resistance.
Precision Forming and Machining
Processes such as cold heading, stamping, and turning ensure precise dimensional control, meeting customer requirements for dimensional accuracy and surface quality.
Welding and Component Assembly
Techniques including resistance welding, laser welding, silver brazing, and automatic riveting are employed to ensure reliable connections between contacts and carriers.
In-Process Inspection
Key dimensions, appearance, hardness, electrical conductivity, and welding quality are monitored during production to ensure compliance with technical specifications.
Cleaning and Packaging
Products undergo cleaning and are sealed in anti-oxidation packaging to minimize the risk of surface discoloration during transportation and storage.
Applications
|
Industry |
Application Components |
Typical Operating Conditions |
|
Electric Vehicles (EV/HEV) |
Main Relays, Pre-charge Relays, Battery Disconnect Units (BDU), Power Distribution Units (PDU) |
High-voltage DC switching and high-current carrying applications |
|
Energy Storage Systems (ESS) |
DC Contactors, Battery Disconnect Switches |
High-cycle operation under demanding load conditions |
|
EV Charging Infrastructure |
DC Charging Relays, Fast Charging Protection Devices |
Frequent switching and high-current DC applications |
|
Industrial Automation |
Power Relays, Industrial Contactors, Control Switches |
Inductive loads and repetitive switching operations |
|
Power Distribution |
Distribution Relays, Protection Devices |
Long service life and reliable current carrying performance |
|
Railway & Transportation |
Auxiliary Power Relays, Control Contactors |
Vibration-resistant and harsh operating environments |
|
Telecommunications |
Power Transfer Relays, Backup Power Switching Devices |
Stable operation with long electrical life requirements |
|
Construction & Off-road Equipment |
Battery Isolation Relays, Main Power Contactors |
High inrush current and intermittent heavy-duty operation |
OEM/ODM Customization Services
Material Customization
Supports the development of AgSnO₂, AgNi, AgCu, AgW, and other specialized silver-based materials.
01
Dimensional Customization
Supports customization of contact diameter, height, base layer thickness, and dimensional tolerances.
02
Structural Customization
Supports the development of rivet-type, sheet-type, bimetallic/composite, and irregular structures, as well as contact assemblies.
03
Welding Process Customization
Supports various joining methods, including resistance welding, laser welding, silver brazing, and automatic riveting.
04
Sample Development Support
Provides services such as 2D/3D drawing evaluation, sample fabrication, small-batch validation, and product optimization.
05
Testing Capabilities
We provide testing support tailored to specific project requirements, including:
• Contact resistance testing;
• Conductivity testing;
• Microhardness testing;
• Microstructural analysis;
• Weld shear strength testing;
• Visual and dimensional inspection;
• Electrical endurance testing support (subject to project requirements);
Temperature rise and reliability verification support (subject to project requirements).
Why Choose Us
Specialization in Silver-Based Electrical Contact Materials
We have long focused on the R&D and manufacturing of silver-based electrical contacts and contact assemblies, accumulating extensive experience in developing high-power relay products.
Integrated Manufacturing Capabilities
We possess comprehensive production capabilities-including powder metallurgy, internal oxidation, precision machining, and welding/assembly-enabling a one-stop manufacturing process from material preparation to finished product delivery.
Robust Quality Control System
We have established a quality management system covering raw materials, the production process, and finished product inspection, ensuring batch consistency and full traceability.
Extensive Custom Development Experience
We assist clients with material selection, structural optimization, sample development, and performance verification, helping to shorten product development cycles.
Experience Supporting Overseas Projects
Familiar with the procurement processes of overseas clients, we provide technical documentation, custom packaging, sample support, and reliable delivery services to meet the long-term partnership needs of wholesalers, relay manufacturers, and OEM clients.
FAQ
Q: How do I choose between AgSnO₂ and AgNi materials?
A: AgSnO₂ offers superior resistance to arc erosion and welding, making it suitable for high-voltage DC and high-current applications; AgNi offers excellent electrical conductivity and machinability, making it suitable for industrial control and AC load environments.
Q: Do you support PPAP documentation?
A: PPAP documentation can be provided based on specific project requirements; the exact scope is determined by project needs.
Q: Can products be developed based on drawings?
A: We support product development based on customer 2D drawings, 3D models, or samples, and offer sample prototyping services.
Q: Can you provide material test reports?
A: We can provide COAs, dimensional inspection reports, RoHS/REACH declarations, and other project-specific documentation.
Q: Do you support small-batch sampling?
A: We support sample orders and small-batch prototyping to meet customer R&D and validation needs.
Hot Tags: large power relay contacts, China large power relay contacts manufacturers, suppliers, Alternating Current Contactor Contacts, Automobile Electrical Switch Contacts, Button Switch Contacts, Direct Current Contactor Contacts, Large Power Relay Contacts, Subminiature High Power Relay Contacts
