Products Description
Flat Head Silver Solid Rivets for MCBs are specifically designed as fixed contacts in the thermal-magnetic trip unit of MCBs. In the short-circuit instantaneous protection and overload delay protection paths of MCBs, these contacts continuously carry the rated current and withstand periodic interruption arc erosion. Compared to conventional rivets, the flat head design provides a larger contact surface and lower closing bounce, directly reducing the long-term drift rate of contact resistance. This form factor offers engineering advantages for the DC arc conditions of new energy DC MCBs.
Among various non-standard contact requirements, this product is a typical Shaped Plum Contact type. The head contour is obtained by molding rather than machining to retain the complete forging streamline and avoid internal micro-cracks.
Diverse Shape Designs
Flat Foot Trimetal Electrical Contacts
The head is flat, perfectly fitting the plane of the MCB contact base, maximizing the contact area (15%-20% larger than round-head contacts), reducing contact resistance (≤10μΩ), and minimizing heat generation (temperature rise ≤30℃). Suitable for main circuits requiring high current and low impedance.
01
Mushroom Head Copper Rivet
The head is convex and mushroom-shaped, increasing the contact pressure with the mating contact (30%-50% higher than a flat-head). Suitable for magnetic latching relays-magnetic latching relays require high contact pressure to maintain the contact's closed state, preventing poor contact due to vibration or electromagnetic forces.
02
Magnetic Latching Relay Silver Contact with Steps Cap
The head has 1-2 steps, adapting to the stepped structure of the relay contact base, improving installation accuracy (dimensional tolerance ≤±0.02mm), and preventing contact resistance fluctuations caused by installation misalignment.
03
Bullet Type Solid Copper Contacts
The head is conical, making it suitable for installation in confined spaces (such as auxiliary contacts of miniature circuit breakers), reducing friction and wear between contacts and extending service life.
04
Technical Compatibility
Electrical Performance Matching Design
The Shaped Plum Contact uses a composite structure of a silver alloy working layer and a copper/copper alloy substrate. The silver alloy layer exhibits low contact resistance and high arc erosion resistance, making it suitable for short-term overload and breaking conditions in MCBs and low-voltage electrical appliances. The copper substrate provides excellent thermal and electrical conductivity, quickly dissipating the heat generated during contact and breaking, thereby reducing the risk of contact temperature rise.
Structural and Installation Compatibility
The product supports various irregular structural designs, such as Flat Foot Trimetal Electrical Contacts, and is compatible with mainstream assembly processes, including riveting and welding. The head and foot dimensions of the contact are designed according to industry-standard specifications and can directly replace imported or domestic contacts of the same specifications without additional modifications to molds and assembly processes, reducing system adaptation costs and time.
Material and operating condition adaptability
The Magnetic Latching Relay Silver Contact with Steps Cap supports different plating and surface treatment processes, and can adapt to complex working environments such as humidity and dust in the fields of new energy and power electronics, ensuring the performance consistency of the contacts over a wide temperature and humidity range.
Application Areas
| New Energy | Shaped Silver Alloy Contacts can be used in low-voltage control and protection of electrical appliances for power electronic equipment such as photovoltaic inverters, energy storage converters, and new energy vehicle charging piles. |
| Power Electronics | Thick Layer Bimetallic Silver Contacts can be used in low-voltage electrical appliances such as MCBs, MCCBs, AC contactors, magnetic latching relays, and electromagnetic relays. |
| Industrial Control | Short Foot Bimetal Electronic Contacts can be used in switching and control components in automation control equipment, motor protection devices, and power distribution terminal equipment. |
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Choosing a supplier of Flat Head Silver Solid Rivets for MCBs with independent material control capabilities, process precision control, and full-chain quality traceability is the optimal engineering decision to reduce product lifecycle costs and mitigate field failure risks. We look forward to working with your technical team to jointly define the next generation of high-reliability electrical contact standards.
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