Designed specifically for demanding applications like precious metal plating and high precision electrolytic polishing, this ultra-low ripple 40V 40A linear power supply delivers the exceptionally clean, stable power essential for flawless results. Its core strength lies in delivering very low current ripple, ensuring process consistency where even minor fluctuations are unacceptable. Engineered for high reliability, the unit features a robust yet practical structural design incorporating full soft switching technology.

Beyond pure performance, the design prioritizes durability and integration. Effective sealing and isolation provide high protective properties against environmental factors. An optimized cooling system ensures only the radiator is exposed in the air duct, maximizing efficiency while protecting internals. The practical and effective multiple protection system safeguards both the supply and your process. Flexibility is offered through standard and special wiring options, while RS485 digital control enables seamless remote monitoring and system integration. This power supply is built for dependable operation in the most exacting industrial environments.

» Product Applications

Mainly used in the precious metal plating industry (including gold plating, silver plating, and jewelry plating), high-precision electrolytic polishing processes (commonly applied to stainless steel), and various other metal finishing applications.

Field application diagram

Industry application examples

» Technology Advantages

› Modular parallel connection

› Optional N+1 redundant backup

› Capable of online hot maintenance

› RS485 digital control function

› Low-voltage MOS tube rectification

› High power factor, high efficiency

› Reasonable structural design

› Effective sealed isolation

› No water joint design inside the unit

› Practical and effective multiple protection system

› Full soft switch technology

› High reliability

› Low noise, high protection level

» Role of electroplating

Protection Against Corrosion

– Shields metal surfaces from rust and chemical damage (e.g., zinc plating on steel).

Increased Wear Resistance

– Hard coatings (e.g., chromium plating) reduce friction and extend part life.

Improved Appearance

– Adds shiny, decorative finishes (e.g., gold plating on jewelry, chrome on car parts).

Better Electrical Conductivity

– Used in electronics (e.g., copper plating on circuit boards).

Enhanced Solderability

– Improves bonding in electronic components (e.g., tin plating).

Repair of Worn Parts

– Restores dimensions and functionality (e.g., rebuilding engine components).

Special Industrial Uses

– Provides heat resistance (e.g., nickel plating in aerospace).

– Used in medical devices (e.g., biocompatible coatings).

» Types of electroplating

› Copper Plating

Purpose: Enhances adhesion for subsequent layers and corrosion resistance.

Note: Prone to oxidation (forms non-conductive copper oxide/green patina). Requires protective coatings.

​› Nickel Plating

Purpose: Used as a base layer or decorative finish; improves corrosion/wear resistance. Electroless nickel offers chrome-like durability.

Note: Magnetic properties limit use in electronics (e.g., DIN/N connectors) to avoid signal interference.

​› Gold Plating

Purpose: Optimizes conductive contact impedance and signal transmission.

Key: High stability but costly.

​› Palladium-Nickel Plating

Purpose: Superior signal transmission and wear resistance vs. gold.

Advantage: Combines palladium’s corrosion resistance with nickel’s hardness.

​› Tin-Lead Plating

Purpose: Improves solderability.

Trend: Phased out due to lead concerns; replaced by bright/matte tin alternatives.

​› Silver Plating

Purpose: Best conductivity and signal performance.

Note: Conducts even when oxidized but tarnishes over time. Higher cost.

​Selection Criteria

Match plating type to application needs: corrosion/wear resistance, conductivity, cost, and environmental regulations.

» Elements of Electroplating

› Cathode
The object to be plated (e.g., connector terminals or metal surfaces) where metal ions deposit into a solid coating.

› Anode

​Soluble Anode: Made of the plating metal. Dissolves during electrolysis to replenish metal ions in the solution.

​Insoluble Anode: Used for precious metals (e.g., white gold, iridium oxide). Does not dissolve but supplies electrons for reduction.

› Plating Solution
Contains ions of the target metal. Composition and concentration determine coating thickness, adhesion, and appearance.

› Plating Tank

Materials: Must resist corrosion and temperature fluctuations (e.g., polypropylene, titanium alloys).

Role: Stores solution and maintains stable plating conditions.

› Rectifier

Converts AC to DC power to drive electrolysis.

Adjust voltage/current to control deposition speed and coating thickness.

› Auxiliary Equipment

​Filters: Remove impurities from the solution.

​Heaters: Maintain solution temperature.

​Stirrers: Ensure uniform mixing.

» Component Part for Electroplating

» Cooling Type for Electroplating

Air Cooling:Heat dissipation fan + air duct + comb heat sink

Water Cooling：Built-in water circulation line

» Technical Parameters

» Solution

Liyuan will keep up with the world’s latest technology closely, and uphold the concept of providing customers with high-quality power supplies and professional integrated services.

With advanced design and rich experience in rectifier manufacturing, we will provide the best power solutions as well as the most stable and efficient power supply for users both at home and abroad.

» Technical Capability

LIYUAN rectifier is the most competitive brand in China

Company relies on strong technology research and development cooperation basis, created a number of advanced technology, in recent 3 years amounted to more than 30 to apply for a patent, which has nearly 10 patents of invention.

Equipped with the national electric power transformation and control engineering technology research center (branch), and has set up a loan enterprise academician workstation.

Strict implementation of ISO quality management system, and through the CE safety certification, has been implementing ERP management for many years, to achieve the network, systematic computer control, the formation of a standard, efficient modern management system.

» Qualification certification

Liyuan adhere to innovation and the continuous improvement of power conversion efficiency and product quality.

The increasing R&D investment every year, and cooperation with China’s well-known universities, we has established the research center of national electric power conversion and control engineering technology.

Especially the related core patents of high-power synchronous rectifier power supply, stay ahead of the whole industry in China.

The ISO 9001 quality management system has been fully implemented in Liyuan, including quality inspection of components in warehouse, production process inspection, and final product inspection.

We adopt advanced scientific quality management system and the most stringent testing methods in the whole process to ensure the stability and reliability of products.

» Service

› Packing

1.Small size rectifier packing in carton box separately.

2.Large size rectifier will be packed in wooden case.

3.We guarantee that all the packing is intact when it reaches its destination.

› Shipping

1.30-45 Days after payment.

2.Transport: DHL, FEDEX, UPS, Air shipping, Boat shipping

3.You may choose our shipping partner or your own partner.

› Maintenance

We are pleasant to share our theory and experience on equipment maintenance with users.

We are pleasant to interact with users to collect their tips and know-hows on equipment maintenance.

The module “Maintenance” here is intended to help users solve various problems they possibly encounter during equipment maintenance…

If you need other types of electroplating rectifiers, we can offer custom designs to meet your requirements. Please contact us.

Looking for an ultra-low ripple 40V 40A linear power supply for precious metal plating? Liyuan Haina Rectifier is one of the professional manufacturers and suppliers in this field. With over 27 years of focus on R&D, design, production, sales, and technical services for industrial rectifiers, we have already exported our products to the United States, Canada, Britain, Portugal, Italy, Spain, South Africa, Russia, the UAE, Japan, South Korea, Malaysia, and other parts of the world. Equipped with a productive factory, we warmly welcome you to purchase our high-quality, Made-in-China products at competitive prices or try our customized service.

How to Get Your Electroplating Rectifier Quote – Have These Ready

• Input power (voltage, phase)
• Output requirements (voltage, current, power rating)
• Rectifier type (DC, pulse, programmable, etc.)
• Control and monitoring preferences
• Cooling method
• Size and installation constraints
• Safety and compliance needs
• Budget range

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