Products Description
We manufacture silver alloy contact rivets for relays, including contact materials such as AgNi, AgSnO₂, AgSnO₂In₂O₃ and other silver alloy systems according to the relay load and customer specification.
Relay contacts are usually small parts, but dimensional consistency is important because the rivets are often fed, riveted and assembled on automated production lines. For this reason, we pay attention not only to the electrical contact material, but also to head diameter, shank diameter, rivet length and batch consistency.
Our relay contact rivets are used in communication relays, power relays, signal relays, protective relays, magnetic latching relays and related switching devices.
Matching the Contact Material to the Relay
Different relay types do not place the same electrical stress on the contact surface.
For a small signal relay, stable contact resistance and reliable switching at relatively low electrical loads may be more important.
For a power relay, the contact may need to withstand higher making current, breaking current and electrical arc energy.
For magnetic latching and industrial control relays, switching frequency, load type and expected electrical life also affect the material choice.
Because of these differences, we normally confirm the relay application before recommending or producing the contact material.
AgNi Contact Rivets
AgNi is widely used for relay and general switching contacts.
It provides a useful balance of electrical conductivity, mechanical strength and resistance to material transfer. It can be considered for many general relay applications where the switching conditions are moderate.
We can supply AgNi relay contact rivets in different material compositions and dimensions according to the approved drawing.
AgSnO₂ Contact Rivets
AgSnO₂ is often selected where greater resistance to electrical arc erosion and contact welding is required.
It is suitable for relay applications that experience higher making currents or more demanding switching conditions.
For projects already using an AgSnO₂ grade, we can manufacture the rivet according to the specified composition instead of changing the material system.
AgSnO₂In₂O₃ Contacts
AgSnO₂In₂O₃ is also used in silver alloy electrical contacts where specific switching performance is required.
The suitability of this material depends on the relay design, contact load and customer test requirements.
AgCdO Contacts
AgCdO has historically been used in relay and switching contacts because of its electrical switching characteristics.
For projects that still specify AgCdO, the destination market and applicable environmental or regulatory requirements should be confirmed before material selection and production.
Relay Application and Material Reference
The following is a practical starting point rather than a fixed material rule:
| Relay application | Main contact requirement | Materials commonly considered |
|---|---|---|
| Signal relay | Stable contact resistance, small contact size | Ag, AgNi or specified silver alloy |
| Communication relay | Consistency and reliable repeated switching | AgNi or application-specific alloy |
| General power relay | Arc resistance and resistance to material transfer | AgNi, AgSnO₂ |
| Higher-inrush power relay | Resistance to contact welding and arc erosion | AgSnO₂ or specified oxide alloy |
| Magnetic latching relay | Stable switching performance over repeated operations | AgNi, AgSnO₂ or customer-specified material |
| Industrial control relay | Balance of electrical life and batch consistency | AgNi, AgSnO₂ and other approved materials |
This table is not intended to replace electrical testing. The final material should be confirmed using the actual relay voltage, current, load type and required life.
Rivet Dimensions Matter in Automated Relay Production
Relay manufacturers often use automated riveting and assembly equipment, so contact dimensions need to remain consistent from batch to batch.
We manufacture relay contact rivets according to drawing requirements for dimensions such as:
Head diameter
- The diameter of the switching contact surface.
Head thickness
- Selected according to the electrical contact design and available installation space.
Shank diameter
- Matched to the mounting hole and riveting process.
Shank length
- Determined according to the carrier thickness and riveting allowance.
Contact profile
- Flat or radius surfaces can be produced according to the relay contact structure.
For composite rivets, the silver alloy layer and copper portion can also be defined according to the approved drawing.
Made for Automatic Assembly
For high-volume relay production, dimensional dispersion can affect feeding, positioning and riveting.
We therefore manufacture the rivet around the customer's assembly requirements rather than treating the part only as a piece of silver alloy.
If the customer is using automatic feeding or riveting equipment, we recommend providing the critical dimensional tolerances together with the drawing.
This helps us control the dimensions that directly affect batch assembly.
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