Infineon DD260N18K IGBT Module

Content last revised on October 29, 2025.

DD260N18K | 1800V Diode Module Engineered for High-Reliability Rectifier Applications

Product Overview & Key Specifications

Engineered for Longevity in Demanding Power Conversion Systems

The DD260N18K is an 1800V diode module designed for exceptional reliability, leveraging pressure contact technology to extend operational lifetime in high-power industrial systems. This device provides a robust solution for the input rectifier stages of variable frequency drives, power supplies, and DC motor controls. Key specifications include: 1800V | 260A | Rth(j-c) 0.095 K/W. Its design directly addresses the common failure modes associated with thermal cycling, ensuring consistent performance and minimizing system downtime. For high-power 690V AC line rectifiers where long-term operational reliability is non-negotiable, this module's pressure contact design presents a decisive advantage.

Key Parameter Overview

Decoding the Electrical and Thermal Specifications for Robust Design

The technical specifications of the DD260N18K are tailored for high-power rectification and long-term stability. The parameters below highlight its capacity to handle demanding electrical loads while maintaining excellent thermal performance, a direct result of its advanced packaging technology.

Download the DD260N18K datasheet for detailed specifications and performance curves.

Application Scenarios & Value

System-Level Advantages in Industrial Drives and Power Supplies

The DD260N18K is an optimal choice for the input rectifier stage of high-power industrial equipment, particularly in applications exposed to frequent load changes. Consider a large Variable Frequency Drive (VFD) controlling a conveyor system in a manufacturing plant. Each start/stop cycle induces significant thermal stress on the power components. The pressure contact design of this module directly mitigates this challenge by eliminating solder layers, a primary point of fatigue and failure in conventional modules. This results in a longer operational lifespan and superior system availability, protecting the critical DC bus from unexpected failures.

Its high surge current rating (IFSM) of 4300A ensures the module can safely withstand the inrush currents typical of motor startups and line disturbances. The 1800V blocking voltage provides a substantial safety margin for operation on 690V AC industrial lines, accommodating voltage spikes and ensuring compliance with standards like IEC 61800-5-1. While the DD260N18K serves a wide range of applications, designers working with different form factors or mounting requirements might also evaluate devices such as the SKKD260/16 for alternative system integration strategies.

Engineering FAQs on the DD260N18K's Reliability and Application

How does the pressure contact design of the DD260N18K benefit systems with high thermal cycling?

Pressure contact technology eliminates solder layers between the semiconductor die and the baseplate. In applications with frequent temperature swings, these solder layers can fatigue, crack, and eventually fail, leading to increased thermal resistance and device breakdown. By using a precisely calibrated mounting force to ensure contact, the DD260N18K maintains a consistent, low-resistance thermal path throughout its entire operational life, drastically improving long-term reliability.

What is the significance of the 1800V VRRM rating for an industrial drive application?

For industrial drives operating on a 690V AC line, the peak voltage can approach 975V under ideal conditions. However, transient overvoltages from the grid or switching events within the system can cause much higher voltage spikes. The 1800V Repetitive Peak Reverse Voltage (VRRM) provides a robust safety margin of nearly 2x the nominal peak voltage, ensuring the rectifier diodes do not enter an avalanche breakdown condition. This enhances the overall ruggedness and safety of the drive system.

Technical Deep Dive

A Closer Look at Pressure Contact Technology for Enhanced Durability

The core strategic advantage of the DD260N18K lies in its implementation of pressure contact technology, a design philosophy that prioritizes mechanical and thermal robustness over the entire product lifecycle. Unlike conventional power modules that rely on soldered connections to join the silicon chip to the substrate and baseplate, this design uses external mechanical force to create a highly reliable electrical and thermal interface. This seemingly simple change has profound engineering implications.

What is the primary benefit of its pressure contact design? Enhanced long-term reliability by eliminating solder fatigue. The coefficient of thermal expansion (CTE) mismatch between silicon, solder, and copper is a well-known wear-out mechanism. Over thousands of heating and cooling cycles, this mismatch creates mechanical stress that degrades the solder joint. Pressure contact technology completely sidesteps this issue. To visualize this, think of a soldered joint as a rigid glue bond that becomes brittle and cracks with repeated flexing. In contrast, a pressure contact is like a pre-loaded bolted connection; it is designed to maintain a constant, uniform pressure, ensuring integrity even as the conjoined parts expand and contract. This leads to a stable, low thermal management path and predictable performance, making it an ideal choice for applications where maintenance is difficult and reliability is paramount.

Technical Support and Sourcing

To evaluate the DD260N18K for your next high-reliability power system, or for assistance in cross-referencing and procurement, please contact our technical sales team for expert support.