Introduction
AgCdO rivet compound contacts feature a premium silver cadmium oxide layer bonded to a conductive copper base. This composite design balances high electrical conductivity with exceptional resistance to arc erosion and material transfer under heavy electrical loads.
Technical Specifications
|
Parameter / Property |
Contact Layer (AgCdO) |
Base Material (Copper / Cu) |
Composite Structure |
|
Material Composition |
AgCdO10 to AgCdO15 (10-15% CdO, Bal. Ag) |
Pure Copper (>= 99.9% Cu) |
Solid Layer / Head-Bimetal / Shank-Bimetal |
|
Electrical Conductivity |
>= 75% IACS (varies by CdO content) |
>= 98% IACS |
Unified Interface |
|
Hardness (HV) |
90 - 115 HV |
65 - 85 HV |
Cold-Welded / Hot-Bonded Interface |
|
Density (g/cm3) |
~ 10.1 - 10.2 |
~ 8.9 |
Structurally Integrated |
|
Available Dimensions |
Head Dia: 1.5mm - 8.0mm |
Shank Dia: 1.0mm - 5.0mm |
Custom tooling available |
Product Features
Anti-Welding: CdO particles decompose under high-temperature arcs, absorbing energy to prevent contact welding during high-current switching.
Stable Contact Resistance: Maintains minimal voltage drop over its life cycle to ensure energy efficiency and prevent thermal runaway.
High Thermal Conductivity: Efficiently dissipates switching arc heat, protecting the surrounding switchgear assembly.
High Precision: Automated cold-heading maintains tolerances within ±0.02mm for seamless integration into high-speed assembly lines.
Industrial Applications
Industrial Control: Low-voltage contactors, motor starters, and AC/DC relays.
Automotive Systems: High-current power relays, window lift switches, and wiper controls.
Residential & Commercial: Miniature Circuit Breakers (MCB), Molded Case Circuit Breakers (MCCB), wall switches, and thermostats.
Quality Assurance & Compliance
Certifications
Produced under ISO 9001:2015 and IATF 16949 automotive-grade management systems for batch consistency and zero-defect tracking.
Advanced Testing
Features 100% ultrasonic non-destructive testing for bond integrity, plus optical sorting, XRF composition analysis, and metallographic mapping.
Regulatory Compliance
AgCdO qualifies for specific industry exemptions (e.g., specific switchgear, safety relays). We provide full REACH declarations and exemption certificates tailored to your market.
Frequently Asked Questions
Q: Are AgCdO contacts compliant with RoHS regulations for European and North American markets?
A: Cadmium is restricted under RoHS; however, several crucial exemptions exist for specific electrical contact applications, particularly in industrial switchgear, safety relays, and automotive systems where no viable alternative exists. We provide comprehensive compliance declaration sheets outlining the specific exemption clauses applicable to your product category.
Q: How do you guarantee the bond strength between the silver layer and the copper shank?
A: We utilize an advanced cold-welding/hot-bonding co-extrusion process. Every production batch undergoes rigorous destructive shear testing and metallographic micro-section analysis to ensure the bond zone exceeds 99.9% interface integration, eliminating the risk of delamination during operation.
Q: What is the benefit of choosing internally oxidized AgCdO over powder metallurgy versions?
A: Internally oxidized AgCdO provides a highly uniform, ultra-fine dispersion of cadmium oxide particles throughout the silver matrix, resulting in superior arc-erosion resistance and lower contact resistance compared to standard powder metallurgy methods.
Q: Can you match exact dimensions from an existing engineering drawing?
A: Yes. Our in-house tool-and-die shop can reproduce your custom dimensions with tolerances held strictly to +/- 0.02mm for head and shank diameters. We accept STEP, DWG, and PDF schematics.
Q: What is the Minimum Order Quantity (MOQ) for custom-dimension composite rivets?
A: Our standard MOQ for custom production runs is typically 50,000 pieces, depending on the dimensions and material mass. For initial prototyping and engineering validation, we can offer lower-volume trial batches.
Q: How do you prevent the contact surfaces from tarnishing or oxidizing before assembly?
A: All shipments are packed in vacuum-sealed bags with localized desiccants. For applications with extended storage times, we offer a specialized surface passivation layer or a micro-thin Gold (Au) or Silver (Ag) flash coating that protects the surface without impacting electrical performance.
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