Content last revised on January 9, 2026
SEMIKRON SKD82/16 | Reliable 1600V Dual Diode Module for Industrial Power Systems
The SEMIKRON SKD82/16 is a high-reliability dual diode rectifier module engineered for demanding industrial power conversion applications such as single-phase rectifiers and freewheeling circuits. While often deployed as the foundational front-end for systems using IGBTs, It plays a key role in converting AC to DC in single-phase rectification or freewheeling circuits, providing a reliable DC path within industrial power systems. This 82A, 1600V module, housed in the robust SEMIPONT® 2 package, is the workhorse for creating the DC bus that powers inverters, motor drives, and high-power supplies. Its design prioritizes durability and thermal efficiency, making the SKD82/16 a cornerstone component for any serious industrial power design.
Technical Deep Dive: The Engineering Behind the SKD82/16
Two core attributes define the performance and integration value of the SEMIKRON SKD82/16:
- Robust Bridge Rectifier Topology: The module employs a B2 (two-diode) configuration, enabling use in single-phase rectification or as a freewheeling diode pair in DC link applications. The beauty of this design lies in its inherent simplicity and ruggedness. It provides efficient and reliable AC-to-DC rectification without complex control circuitry, forming the first critical stage in a three-phase IGBT inverter system. This foundational stability is paramount for the performance of downstream switching components.
- Thermally Optimized SEMIPONT® 2 Package: The module features a high-reliability package with an electrically isolated baseplate. This design choice is a significant advantage for system integrators. It eliminates the need for expensive and fragile insulating foils between the module and the heatsink, streamlining assembly, reducing costs, and improving the thermal transfer path. The choice of IGBT baseplate material and construction is critical for long-term reliability.
Multi-Dimensional Application Scenarios & Value Proposition
The true value of the SKD82/16 is realized in how it solves specific challenges across various applications:
- AC Motor Drives & Servo Controllers: In this core application, the SKD82/16 provides the stable DC bus voltage required by the inverter stage. Its high voltage rating (1600V) offers a significant safety margin for 400/480VAC line applications, protecting against voltage transients and ensuring the longevity of the connected IGBTs.
- Uninterruptible Power Supplies (UPS): Reliability is non-negotiable in UPS systems. The SKD82/16 serves as the primary rectifier, converting incoming AC power to charge the battery bank and supply the inverter. Its robust design ensures continuous operation during line sags or swells, maintaining power integrity.
- Industrial Welding Equipment: Inverter-based welders require a stiff and stable DC rail to produce a consistent welding arc. The SKD82/16 delivers the high-current DC power needed for the subsequent high-frequency switching stage, directly contributing to weld quality and equipment durability.
- High-Power DC Supplies: For applications from industrial electroplating to large-scale battery charging systems, this module offers a straightforward and highly dependable solution for bulk AC-to-DC power conversion, forming the core of the power supply unit.
Key Technical Parameters at a Glance
| Parameter | Value |
|---|---|
| Repetitive Peak Reverse Voltage (VRRM) | 1600 V |
| Average Forward Current (Id) at Tc=100°C | 82 A |
| Surge Forward Current (IFSM) | 950 A (10 ms) |
| Isolation Test Voltage (Visol) | 3000 V (RMS, 1 min) |
| Package Type | SEMIPONT® 2 |
For a comprehensive list of parameters, please refer to the official SKD82/16 Datasheet.
Frequently Asked Questions (FAQ)
- Is the SKD82/16 suitable for three-phase AC rectification?No. The SKD82/16 is a dual diode module, not a full three-phase bridge. For three-phase AC front-end rectification, consider the SKB or SKD 3-phase bridge series.
- What is the primary benefit of the isolated baseplate?The isolated baseplate simplifies thermal management. It allows you to mount the module directly to a grounded heatsink without any additional insulating layers, which reduces assembly complexity, improves heat transfer, and enhances overall system reliability.
- Can this module handle regenerative energy from a motor?As an uncontrolled rectifier, the SKD82/16 does not allow reverse power flow. In applications with significant regenerative energy (e.g., motor braking), a separate braking chopper circuit or a fully controlled active front-end (AFE) rectifier would be required.
Choosing the right front-end rectifier is as critical as selecting the main switching components. The robust design and thermal efficiency of the SEMIKRON SKD82/16 provide a dependable foundation, ensuring the stability and longevity of your entire power electronics system. This module represents a smart investment in system reliability. For application-specific advice or to explore our full range of Semikron IGBT and diode solutions, please contact our technical specialists.
