Content last revised on November 21, 2025
VSKDS201/045 | 200A 450V Dual Schottky Rectifier Module
Product Overview
Optimized for High-Efficiency, High-Current Rectification
Engineered for demanding power conversion applications, the Vishay VSKDS201/045 is a high-performance dual Schottky rectifier module that prioritizes efficiency and thermal reliability. This device integrates two 100A Schottky diodes in a common cathode configuration, encapsulated in the industry-proven ADD-A-PAK package. With its extremely low forward voltage drop and high temperature operation, this module is an ideal solution for engineers designing high-current switching power supplies, UPS systems, and welding equipment where minimizing power loss is a critical design objective. For industrial systems operating on higher voltage lines, the related SKKD162/16 provides a 1600V rating in a robust package.
Key Parameter Overview
Decoding Electrical and Thermal Ratings for High-Efficiency Design
The VSKDS201/045's specifications are tailored to deliver robust performance and simplify thermal design. The combination of a low forward voltage and high temperature capability enables higher system efficiency and power density.
| Parameter | Value | Conditions |
|---|---|---|
| Repetitive Peak Reverse Voltage (VRRM) | 45 V | - |
| Average Forward Current (IF(AV)) | 200 A | Per module, TC = 142°C |
| Forward Voltage Drop (VF) | 0.72 V | @ 100 A, TJ = 25°C |
| Surge Forward Current (IFSM) | 8600 A | 10 ms half sine-wave |
| Operating Junction Temperature (TJ) | -55°C to 175°C | - |
| Thermal Resistance (RthJC) | 0.24 °C/W | Junction to Case, Per Diode |
| Package / Case | ADD-A-PAK (TO-240AA) | - |
Download the VSKDS201/045 datasheet for detailed specifications and performance curves.
Application Scenarios & Value
System-Level Benefits in High-Current Power Conversion
Best fit for high-current SMPS output stages, this 45V module's low conduction loss is the optimal choice for maximizing efficiency. In applications like plating power supplies or high-power DC-DC converters, output rectification is a major source of power loss. The VSKDS201/045 directly addresses this challenge. Its maximum forward voltage of 0.72V at 100A is significantly lower than that of standard silicon rectifiers. This difference translates directly into reduced power dissipation (P = VF x IF), meaning less heat is generated. For system designers, this allows for the use of smaller, more cost-effective heatsinks and can lead to a more compact overall product footprint.
Furthermore, its robust construction is vital for industrial environments. The extremely high surge current rating of 8600A provides a substantial safety margin against fault conditions or the large inrush currents typical when energizing a large DC Bus capacitor bank in a high-power Switching Power Supply (SMPS). This inherent ruggedness prevents device failure and enhances the long-term reliability of the end equipment.
Engineering FAQ for the VSKDS201/045
Design Considerations for Maximizing Performance
What is the primary benefit of Schottky barrier technology in this application?
The primary benefit is efficiency. Unlike standard P-N junction diodes, Schottky diodes have a metal-semiconductor junction, resulting in a much lower forward voltage drop and virtually no reverse recovery time. This drastically reduces both conduction and switching losses, which is critical in high-frequency, high-current applications like the output stage of an UPS systems.
How does the ADD-A-PAK package simplify the manufacturing process?
The ADD-A-PAK package features an electrically isolated baseplate, which is recognized under UL E78996. This means the module can be mounted directly to a grounded heatsink without needing a separate, thermally-resistive insulating pad and specialized hardware. This simplification reduces parts count, lowers assembly time and cost, and improves thermal transfer consistency compared to non-isolated solutions.
Why is the 175°C maximum junction temperature a critical parameter?
A high maximum junction temperature provides a larger thermal operating margin. Think of it as thermal headroom. It ensures the device remains reliable in environments with high ambient temperatures or under load conditions that cause significant self-heating. This robustness is essential for enclosed, fan-less power supplies or equipment operating in harsh industrial settings. More details on thermal design can be found in this guide to thermal management.
Can the two internal diodes be used in parallel to achieve a 200A rating?
While the module is rated for 200A total, the two diodes are internally configured with a common cathode and two separate anodes. They are designed to operate together, for instance, as the two diodes in a center-tap secondary rectifier circuit. For paralleling to work effectively, careful layout to ensure current sharing is essential, as described in guides for decoding datasheets for power modules.
Technical Deep Dive
A Closer Look at Schottky Technology and the ADD-A-PAK® Package
The performance of the VSKDS201/045 is rooted in two key design choices by the manufacturer, Vishay: the use of advanced Schottky barrier technology and the robust, user-friendly ADD-A-PAK package. The Schottky rectifier's low forward voltage is not just a number on a datasheet; it represents a fundamental advantage in the power-loss equation. For every amp flowing through the device, less energy is converted into waste heat, allowing designers to push for higher efficiency targets mandated by modern energy standards.
The ADD-A-PAK package provides a mechanically secure and thermally efficient foundation. Its design facilitates simple, direct mounting to a heatsink, optimizing the thermal path from the silicon junction to the ambient air. This focus on practical integration ensures that the module's excellent electrical characteristics can be fully realized in a real-world system, promoting both performance and long-term operational reliability.
Strategic Advantage
Integrating the VSKDS201/045 into a power system design is a strategic decision that favors efficiency and reliability. As energy costs and thermal density challenges continue to escalate, selecting components that minimize losses at the source becomes a key competitive advantage. This module's core attributes directly support the development of more compact, efficient, and robust power conversion equipment, aligning with market demands for higher performance and lower total cost of ownership.
