Heavy-Duty Tinning Rectifier (12V/2500A) for Tin Plating

This power supply is engineered as the industrial backbone for continuous strip tinning lines and matte tin process operations. It rejects generic inverter designs in favor of a fully scalable IGBT topology, delivering the ripple-free current density required for high-speed PCB busbar plating and wire tinning applications. As a dedicated industrial high frequency rectifier factory, we have eliminated the compromises found in multi-purpose units to provide a modular solution that directly addresses the output stability and corrosion resistance demands of a modern tin line.
Part 1 Key Features & Engineering Highlights
Modular Drawer Architecture The rectifier utilizes a hot-swappable 20U cabinet design. Each power drawer contains a single IGBT module with independent cooling. This allows you to expand from 1500A to 10,000A+ on site without cabinet replacement, and a failed drawer can be swapped in under 5 minutes without downtime or tools.
Active Ripple Cancellation Unlike standard SCR units delivering 15-25% ripple, this unit employs patented digital feedback loops to achieve a steady 0.5% ripple. This eliminates “burned” tin deposits and ensures mirror-bright surfaces on matte tin process lines.
Cold-Forged Busbars The internal copper pathways are not simple castings. They are CNC-machined, silver-plated busbars rated for 3000A continuous duty. This prevents hotspot degradation at the 2500A limit, a critical factor when comparing heavy-duty DC power supply price against long-term maintenance costs.
Part 2 Technical Specifications Table
| Parameter | Specification |
| :— | :— |
| AC Input Voltage | 3-Phase 415VAC ±10% / 50-60Hz (380V, 480V optional) |
| DC Output Voltage | 0 – 12V (Continuously Adjustable) |
| DC Output Current | 0 – 2500A (Settable with 0.1A resolution) |
| Rated Power | 30 kW (12V x 2500A) |
| Ripple Coefficient | ≤ 1% RMS at full load (Steady 0.5% typical) |
| Cooling Method | Forced air (TEFC blower, dual fan redundant) |
| Control Mode | CV / CC / Pulse (0-3000Hz) |
| Protection Index | IP42 (Cabinet), IP54 (Control panel) |
| Operating Ambient | 0°C to +45°C |
| Dimensions (Approx) | 1200mm (W) x 850mm (D) x 1850mm (H) |
| Weight (Approx) | 420 kg |
Part 3 Advanced Built-in Protection Systems
This module is a self-monitoring fortress. It deploys six layers of protective logic that operate at hardware speed to prevent catastrophic failure in high-cycle tin plating environments.
– Ingress & Corrosion Protection All air intake filters are coated with an anti-Mist polymer. Every PCB is triple-conformal-coated to resist the acidic vapors typical of continuous strip tinning operations. Unlike standard units, there is no exposed copper trace within the air path.
– Over-Current & Short-Circuit Gate A dedicated DSP monitors the IGBT collector-emitter saturation voltage (Vce(sat)) 10,000 times per second. If the melt-through threshold is detected, the main breaker trips in under 2 microseconds, preventing IGBT shrapnel damage.
– Thermal Derating Curve The system does not just “shut down” at 50°C. It gradually derates current, dropping 1% per degree until 65°C, then gracefully folds back. This keeps the line running in ambient >50°C conditions without a hard crash.
– Phase Loss & Undervoltage Lockout The control board samples the incoming 3-phase voltage. If one phase drops below 200V (415VAC units) or frequency deviates by ±5Hz, the output is disconnected within 500ms to protect the power stage.
Part 4 Target Industrial Applications
This 12V/2500A platform is not a “general purpose” machine. It is purpose-built for high-cycle density processes where current uniformity determines final yield.
– Continuous Strip Tinning This unit excels on hot-dip and electro-tinning lines where the strip moves at 60m/min. Its low ripple ensures that tin stays evenly deposited across the entire 1000mm strip width, eliminating edge-build defect rates below 1%.
– Matte Tin Process For PCB busbar plating needing a dull, corrosion-resistant finish, the unit’s high frequency switching (above 20kHz) prevents the brightener from being burned. Lines using this rectifier observe a 15% reduction in tin carbonate consumption.
– Wire Tinning & Connectors Especially suited for litz wire and heavy-duty (500mcm) cables. The 2500A capability handles bulk barrel loads, while the soft-start feature prevents wire snapping during initial immersion.
Part 5 Customization and Tailored Engineering Services
As a IGBT rectifier manufacturer with a dedicated in-house engineering team, this unit is 100% configurable before shipment. We do not sell “off-the-shelf” bins. We sell custom-calibrated machines.
– Voltage & Current Tailoring Our factory can deliver any combination from 1V-1000V DC and 1A-100,000A. Input is always AC (1-phase or 3-phase). For this tin plating line, we can add a sealed high-voltage secondary (up to 24V) for stripping cycles.
– Integrated Process Modules You can select from a library of 15 factory-installed modules:
– Programmable Process Timer (0-999s per step)
– Multi-Stage Profile Control (up to 8 current steps with ramping)
– Ampere-Minute Integrator (for precise deposit thickness down to 0.1 micron)
– Automatic Reverse Polarity Switch (for periodic reversal, e.g., 1 sec forward / 0.1 sec reverse)
– Communication & Remote Control Standard RS485 Modbus RTU and Ethernet/IP. Optional Profinet, DeviceNet, or 4-20mA analog interface. Our PLC can talk directly to your Mitsubishi or Siemens line automation.
– Pulse Functions The base unit includes pulse mode from 1-3000Hz adjustable with 0-100% duty cycle. For wire applications, we offer a special High-Frequency Pulse Option (up to 30kHz) which reduces porosity in silver and tin finishes.
– Cabinetry & Environment We stock 304SS and custom powder-coated 316L enclosures. For coil lines exposed to tin fluoborate mist, we offer a full NEMA 4X stainless steel chassis. Consult with our engineers for a free custom current voltage rectifier quote.