Stationary Contact
Products Description
Stationary contacts are indispensable fixed terminals in electrical contact systems, used to mechanically close and disconnect with moving contacts, thereby controlling the flow of current.
Product features include:
Highly stable fixed structure, suitable for high-frequency operation and long-term working environments.
Excellent conductivity, ensuring low temperature rise and low contact resistance.
Strong resistance to welding and arcing, reducing contact wear.
Materials can be customised according to application requirements: silver alloys, copper-based contacts, tungsten-based contacts, sintered materials, etc.
Geometric design allows for precise matching with moving contacts, ensuring optimal contact area.
Main Functions: Systemic Support Beyond Conductivity
Directional Guidance of Arc Erosion
The micro-textures on the surface of the static contact (microgrooves parallel to the current direction, 3μm deep and 5μm wide) guide the arc spot to move along the groove edges, rather than wandering randomly. This is like digging a channel in a torrent, dispersing the erosion energy over a larger area, reducing the ablation depth of the main contact area by 40%, and maintaining an effective contact area of >85% even at the end of its lifespan.
Stability of Long-Term Static Pressure Contact
For bolt tightening scenarios, the back of the Stationary Electrical Contact is designed with anti-loosening micro-tooths (concentric circular teeth with a height of 0.1mm), which embed into the surface of the copper bracket under torque, forming a mechanical interlock. Even if long-term thermal cycling causes a decrease in bolt preload, the mechanical engagement of the micro-tooths still maintains >30% of the initial contact pressure, preventing contact resistance from "climbing".
Multi-Physics Field Compatibility
As a "grounding" component, the Stationary Silver Contact is often integrated with thermal protectors, Hall sensors, etc. Our design ensures a uniform surface magnetic field distribution (by controlling the orientation of the copper core grains) that will not interfere with weak sensing signals. Simultaneously, the surface is coated with a low-temperature physical vapour deposition (PVD) nano-titanium nitride (TiN) coating (<0.5μm thickness), providing additional resistance to sulfidation and organic contamination while maintaining conductivity, making it suitable for corrosive environments such as chemical and marine environments.
Manufacturing Process: Precision Manufacturing Creates Superior Quality
Micron-level Precision Machining
Advanced micron-level machining technology ensures precise control over Stationary Contact Rivet size and shape, meeting the requirements of automated assembly.
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Surface Treatment Process
Unique surface treatment technology enhances wear resistance and oxidation resistance, extending Silver Stationary Contact for Relays lifespan.
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Interface Optimization Technology
Precise interface treatment technology ensures strong bonding between different material layers, preventing interface separation.
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Fully Automated Production
Fully automated production lines ensure Stationary Silver Contact consistency and reduce human error.
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End-to-End Quality Control
Each batch of Stationary Contact for Circuit Breakers undergoes rigorous quality inspection, including tests for dimensions, appearance, contact resistance, and wear resistance, ensuring compliance with international standards.
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Detail Showcase: Professionalism in the Minutes
Edge Integrity
Stamped edges are smooth, burr-free, and free of microcracks. This avoids premature breakdown caused by electric field concentration and eliminates the risk of breakage due to stress concentration during vibration.
Composite Interface Microstructure
Under a metallographic microscope, the interface between the functional layer and the support layer is clear and clean, with uniform element diffusion areas and no oxide inclusions or voids. This is the fundamental guarantee of long-term reliability.
Contact Area Consistency
Within the same batch of Stationary Contact Rivets, the surface morphology, hardness, and gloss of key contact areas are highly consistent, providing predictable and reproducible performance for your large-scale production.
Identification and Traceability
Clear laser marking can be achieved on each Stationary Electrical Contact or its carrier tape, ensuring full traceability of information such as material batch and production date, providing solid support for your quality management system.
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