SKN2000/04
High-current stud-mounted power diode for demanding industrial rectifier applications...
Product Overview
Description
High-current stud-mounted power diode for demanding industrial rectifier applications
Product Series
SKN™
Primary Application
High-Current Rectifiers, Electroplating, Battery Charging, DC Power Supplies up to 1MW
Key Features
- High efficiency and reliability
- Optimized for industrial applications
- Comprehensive technical support
- Available from stock
Specifications
| Part Number | SKN2000/04 |
|---|---|
| Voltage | 400V |
| Current | 2000A |
| Package | DO-205AB (Stud Mount) |
| Vf | 1.1V @ 2000A |
| Trr | N/A (Standard Recovery) |
| Stock | In Stock - 50+ units available |
| Lead Time | Same day shipping |
| Long Description | The Semikron SKN2000/04 is a high-current stud-mounted power diode designed for demanding industrial rectifier applications requiring maximum current handling capability. This device features a robust DO-205AB stud-mount package with M20 thread for secure mechanical mounting and excellent thermal transfer to the heat sink. Key applications include high-power DC power supplies for electroplating and electrolysis processes, battery charging systems for industrial and traction batteries, AC-DC rectifiers for motor drives and industrial equipment, and DC power sources for welding equipment. The diode provides low forward voltage drop of 1.1V at rated current for maximum efficiency, high surge current capability (Ifsm = 28kA) for reliable operation during fault conditions, and excellent thermal performance with Rth(j-c) of 0.03 K/W. The hermetically sealed ceramic housing ensures long-term reliability in harsh industrial environments. Manufacturing follows IATF 16949 quality standards with 100% testing including forward voltage measurement, reverse leakage testing, and thermal impedance verification. |
| Features | Ultra-high current rating (2000A average),Low forward voltage drop (1.1V),High surge current capability (28kA),Excellent thermal performance (Rth(j-c) = 0.03 K/W),Hermetically sealed ceramic housing,Stud-mount package for easy installation,Long-term stability and reliability,IATF 16949 quality certification |
| Alternatives | SKN1500/04 (1500A version),SKN2500/04 (2500A version),SKN2000/08 (800V version) |
| Matching Products | Heavy-duty heat sinks,Thermal paste for stud mounting,Busbar connections,RC snubber networks |
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| Seo Title | Semikron SKN2000/04 Power Diode | 400V 2000A | Stud Mount | LiTong |
| Seo Description | SKN2000/04 - Semikron high-current stud-mounted diode, 400V 2000A. For rectifiers, electroplating. In stock. Contact: +86 15013702378 |
| Fae Review | [object Object] |
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Applications
Motor Drives
Variable frequency drives and servo motor controls
Power Supplies
SMPS, UPS, and industrial power systems
Renewable Energy
Solar inverters and wind turbine converters
EV Charging
Electric vehicle charging stations
FAE Expert Insights
"SKN2000/04 iswe Current purpose . 2000A to 1.1V, in Product veryoutstanding. in and use , can excellent. especially isitshot have 0.03 K/W, suitable hot canrelaxeddeal with run. M20 Design very then, can in hot . Forrequiring 1000A DCoutput apply, excellent cost-performance ratio."
2000A Current , to 1.1V, hot 0.03 K/W
— 吴刚, LiTong Electronics
Frequently Asked Questions
What applications is the SKN2000/04 best suited for?
The SKN2000/04 is optimized for very high-current rectification applications: Electroplating Power Supplies - DC rectifiers for chrome, nickel, and copper plating baths requiring 1000-2000A at 6-48V
Electrolysis Systems - Chlor-alkali production, water electrolysis for hydrogen generation
Battery Charging - Traction battery chargers for forklifts, mining equipment, electric vehicles
DC Welding Power Sources - High-current DC welding machines for industrial applications
Industrial DC Power - Large DC motor drives, electromagnetic separators, crane systems. Key requirements: Low voltage (400V sufficient for most applications), very high current (1000-2000A), continuous operation, high reliability. The stud-mount design allows direct heatsink mounting for optimal thermal performance.
This ultra-high current diode is ideal for your electroplating or high-current DC power application. Contact us for volume pricing and technical support.
How do I mount and cool the SKN2000/04 properly?
Proper mounting and cooling for SKN2000/04: Heatsink Selection - Use water-cooled or heavy forced-air heatsink with thermal resistance <0.02 K/W. Required for 2000A continuous operation
Thermal Interface - Apply thin layer (50-100μm) of high-performance thermal paste (thermal conductivity >4 W/mK) to stud and base
Mounting Torque - Tighten to 40-50 Nm using proper tools. Over-tightening can damage ceramic housing
Electrical Connections - Use copper busbars with adequate cross-section (>400mm²) for 2000A. Ensure proper torque on terminals
Cooling System - Water cooling: 10-20 L/min flow rate. Forced air: >1000 CFM with large heatsink
Temperature Monitoring - Install thermocouple or NTC sensor on heatsink near diode base. Shutdown system if >85°C. Proper thermal management is critical for reliable operation at rated current.
Proper mounting and cooling are essential for reliable operation. Contact our FAE team for thermal design assistance and heatsink recommendations.
What protection is needed for SKN2000/04 in rectifier circuits?
SKN2000/04 protection requirements: Overcurrent Protection - Semiconductor fuses with I2t rating below diode capability (I2t = 800,000 A²s). Fast-acting fuses recommended
Voltage Transient Protection - RC snubbers (100Ω + 0.1μF) across each diode to suppress switching transients
Surge Protection - MOVs across AC input to protect against line surges and lightning
Inrush Limiting - NTC thermistors or soft-start circuit to limit capacitor charging current
Thermal Protection - Temperature sensors on heatsink with shutdown at 85°C case temperature
Reverse Voltage - Ensure 50% margin: 400V diode for <267V peak reverse voltage applications
Current Sharing - For parallel operation, use matched diodes and ensure symmetrical layout with equal trace lengths. Proper protection extends diode lifetime and prevents catastrophic failures.
Comprehensive protection is essential for high-current rectifiers. Contact our FAE team for protection circuit design guidelines.
Can I parallel SKN2000/04 diodes for even higher current?
Parallel operation of SKN2000/04 diodes requires careful design: Current Sharing - Use diodes from same production batch with matched forward voltage characteristics. Positive temperature coefficient helps balance current
Derating - Parallel at 80% of theoretical total current to account for imbalance. Two diodes = 3200A usable, not 4000A
Symmetrical Layout - Keep busbar connections as symmetrical as possible. Equal length and impedance for all parallel paths
Individual Protection - Each diode should have its own fuse for protection
Thermal Management - Each diode needs its own heatsink or separate cooling channel. Monitor each diode temperature
Testing - Measure current in each branch with current probes to verify sharing. Adjust layout if imbalance >10%. For very high currents (>3000A), consider using larger single diodes or specialized rectifier assemblies.
Parallel operation requires careful design. Contact our FAE team for parallel rectifier design guidelines and current sharing analysis.
How does SKN2000/04 compare to other high-current diodes?
SKN2000/04 competitive advantages: Forward Voltage - 1.1V typical is among the lowest in 2000A class, reducing conduction losses by 10-15% compared to competitors
Thermal Performance - Rth(j-c) of 0.03 K/W provides excellent heat dissipation, enabling higher current density
Surge Capability - 28kA surge current rating is industry-leading for reliable fault handling
Package Design - DO-205AB with M20 thread is industry standard, ensuring compatibility with existing equipment
Quality - IATF 16949 certification with 100% testing ensures consistent performance
Availability - Stock availability at LiTong Electronics ensures short lead times. Competitors may offer slightly lower VF but sacrifice surge capability, or offer higher current ratings at significantly higher cost. The SKN2000/04 provides optimal balance for industrial rectification.
The SKN2000/04 offers excellent performance and value for high-current rectification. Contact us for samples and competitive pricing.