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Rated input voltage: single-phase AC220V±10% 50Hz Complies with National Power Quality Standards
Output voltage: DC 0～20V adjustment
Output current: DC 0～30A adjustment
Cooling method: Air Cooling
Power supply type: Synchronous rectifier power source
Application Industry: Surface treatment industry, such as zinc, nickel and chrome plating
AC input voltage enters the rectifier circuit, where it’s filtered and converted into high-voltage DC output. This 20V 30A electroplating rectifier for metal finishing is available at factory price.
The “variable frequency conversion” stage inverts this high-voltage direct current into approximately 30kHz high-frequency alternating current. This high-frequency AC is then transformed into secondary voltage via a high-frequency transformer and filtered through a high-frequency rectifier circuit to produce the required output voltage. The plating rectifier power supply employs a control circuit to sample output voltage and current. These sampled signals undergo closed-loop feedback to generate pulse width modulation (PWM) signals, which regulate the inverter circuit and maintain stable output voltage/current – a critical requirement for precision electroplating applications.
Manufacturers widely use electroplating rectifier equipment for various surface treatment applications, including PCB electroplating, hard chrome coating, copper plating, nickel plating, zinc plating, gold plating, tin plating, and silver plating, among other metal finishing.
1)Field application diagram：
2)Industry application examples:
› 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
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).
› Copper Plating
Primarily applied to improve substrate adhesion for subsequent plating layers while enhancing corrosion resistance. Requires protective topcoats due to oxidation concerns—unprotected copper forms non-conductive patina over time.
› Nickel Plating
Serves as a functional base layer or decorative finish, offering excellent corrosion and wear resistance. Electroless nickel variants approach chrome-level durability. Note: Magnetic properties restrict usage in sensitive electronic components (e.g., RF connectors) where signal interference must be avoided.
› Gold Plating
Preferred for critical electrical contacts where stable impedance and optimal signal transmission are essential. Though highly reliable, material costs limit large-scale applications.
› Palladium-Nickel Plating
Superior wear resistance and signal stability vs. gold plating.
Combines palladium’s oxidation resistance with nickel’s structural integrity for high-cycle connectors.
› Tin-Lead Plating
Historically favored for solderability enhancement. Now largely discontinued due to RoHS regulations; modern replacements include pure matte or bright tin formulations.
› Silver Plating
Delivers maximum electrical conductivity and signal performance across high-frequency applications. Maintains functionality when oxidized but requires anti-tarnish treatments due to surface darkening. Premium cost reflects performance advantages.
› Selection Considerations
Specify plating type according to:
Required corrosion/wear resistance thresholds
Electrical performance parameters
Budgetary constraints
Environmental compliance requirements
Long-term maintenance considerations
› Copper Plating:
Purpose: Primarily used as a primer to enhance adhesion of subsequent plating layers and improve corrosion resistance.
Considerations: Copper is prone to oxidation, which forms copper oxide (copper green) that loses conductivity. Therefore, copper-plated products must undergo copper protection treatments.
› Nickel Plating:
Purpose: Used as a primer or for aesthetic purposes to enhance corrosion resistance and wear resistance. Chemical nickel plating is a modern process that offers wear resistance comparable to chrome plating.
Considerations: Note that many electronic products, such as DIN heads and N heads, no longer use nickel as a primer due to its magnetic properties, which can affect the electrical performance and passive intermodulation inside the device.
› Gold Plating:
Purpose: Improves conductive contact impedance and enhances signal transmission.
Considerations: Gold is highly stable but also the most expensive option.
› Palladium-Nickel Plating:
Purpose: Improves conductive contact impedance and enhances signal transmission. Offers better wear resistance than gold.
Advantages: Combines the benefits of palladium’s corrosion resistance and nickel’s hardness.
› Tin-Lead Plating:
Purpose: Improves soldering ability.
Considerations: Due to concerns about lead content, tin-lead plating is being phased out and replaced by alternatives such as bright tin and mist tin plating.
› Silver Plating:
Purpose: Improves conductive contact impedance and enhances signal transmission.
Advantages: Silver offers the best electrical conductivity among these metals and is relatively resistant to oxidation, maintaining conductivity even after oxidation.
Considerations: While silver’s performance is excellent, its cost and tendency to tarnish over time should be considered.
the choice of plating type depends on the specific requirements of the application, including corrosion resistance, wear resistance, electrical conductivity, cost, and environmental considerations.
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.
Air Cooling:Heat dissipation fan + air duct + comb heat sink
Water Cooling：Built-in water circulation line
| Type of characteristics | Parameters | Technical Requirements |
| Input characteristics | Rated input voltage | single-phase AC220V±10% 50Hz Complies with National Power Quality Standards |
| Rated input current | AC 3.2A | |
| Rated input power | 0.69 KVA | |
| Rated input power Ffactor | COSΦ≥0.95 | |
| Output characteristics | Output voltage | DC 0～20V adjustment |
| Output current | DC 0～30A adjustment | |
| Precision of steady current | ≤1% | |
| Precision of stable voltage | ≤1% | |
| Displayed precision | 0.1A，0.1V | |
| Rated output power | ≥91% | |
| Insulation characteristic | Insulation resistance | Input – Output: ≥5MΩ |
| Input – Cabinet: ≥5MΩ | ||
| Output – Cabinet: ≥5MΩ | ||
| Protective characteristics | With self-protection function under non-normal cases such as over-voltage, over-current, overload, short circuit and overheating | |
| Other characteristics | Noise | ≤75dB |
| Running state | Continuous full load run of product
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| Load level | Level II | |
| Insulation grade of the transformer | Grade B | |
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.
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.
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.
› 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 require surface plating rectifiers in other specifications, we can customize the design to match your exact needs. Please feel free to contact us for more details.
Looking for the factory price of a 20V 30A electroplating rectifier for metal finishing? Liyuan Haina Rectifier, a professional manufacturer with 27+ years specializing in industrial rectifiers, supplies global clients including the United States, Sweden, Netherlands, Italy, Spain, South Africa, Russia, Germany, Japan, South Korea, Malaysia, etc. Our advanced factory delivers cost-effective Made-in-China solutions, with competitive prices and customizable options. Contact us for sales inquiries.
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