DD175N34K High-Reliability Diode Module
Content last revised on October 24, 2025.
M1. DD175N34K Diode Module, 3400V 175A for High-Voltage Rectifier Applications
M2. Introduction & Key Highlights
The Infineon DD175N34K is a high-reliability diode module engineered for demanding high-voltage power conversion systems, delivering robust performance through its advanced pressure contact technology. This module provides a formidable combination of high voltage and current handling: 3400V | 175A | VF up to 2.05V. Key benefits include exceptional operational reliability and a simplified thermal management path. The DD175N34K directly addresses the need for dependable rectification in applications exposed to significant electrical and thermal stress, such as industrial motor drives. For systems prioritizing long-term stability in high-voltage DC environments, the DD175N34K's solder-free internal design makes it a superior choice.
B2. Application Scenarios & Value
System-Level Benefits in Industrial Power Rectification
The DD175N34K is engineered to excel in high-power industrial applications where reliability and thermal efficiency are critical design criteria. Its primary application is in the front-end rectifier stages of large Variable Frequency Drive (VFD) systems, industrial UPS (Uninterruptible Power Supply) , and battery charging infrastructure. In these environments, a key engineering challenge is managing the thermal load and ensuring mechanical robustness over tens of thousands of operating hours. The DD175N34K's pressure contact technology is a direct solution; by eliminating internal solder bonds, which are common points of failure from thermal cycling fatigue, it provides a significantly more durable component. This translates to extended equipment lifetime and reduced maintenance costs. Furthermore, its 3400V blocking voltage offers a substantial safety margin for systems connected to volatile industrial grids, preventing catastrophic failures from transient overvoltage events.
For applications demanding even higher current handling within a similar voltage class, the DD260N18KHPSA1 offers a higher current rating, while for systems operating at lower voltages, the DD171N16K provides a more tailored solution.
B3. Key Parameter Overview
Specifications for High-Reliability Design
The technical specifications of the DD175N34K are optimized for high-voltage rectification and power conversion applications. The following table highlights the key performance metrics that are essential for system design and thermal evaluation.
| Parameter | Symbol | Value | Unit | Conditions |
|---|---|---|---|---|
| Repetitive Peak Reverse Voltage | VRRM | 3400 | V | Tvj = -40°C to Tvj max |
| Average On-state Current | IFAVM | 175 | A | TC = 100°C |
| Maximum On-state Voltage | VF | 2.05 | V | Tvj = Tvj max, iF = 800A |
| Surge Current | IFSM | 4500 | A | Tvj = Tvj max, tP = 10ms |
| Operating Junction Temperature | Tvj op | -40 to 150 | °C |
Download the DD175N34K datasheet for detailed specifications and performance curves.
B5. Industry Insights & Strategic Advantage
Meeting the Reliability Demands of Next-Generation Industrial Automation
In the context of Industry 4.0 and the increasing automation of manufacturing processes, the uptime and reliability of power electronics are paramount. A component failure in a central motor drive or a factory-wide UPS can lead to costly production halts. The DD175N34K, with its robust Power Module design featuring pressure contact technology, aligns directly with this strategic need for enhanced durability. This technology is analogous to using a high-tension bolt connection instead of a welded joint in a critical mechanical assembly; it is inherently more resistant to the repeated stress of expansion and contraction caused by temperature changes. As industrial systems move towards higher power densities and operate in harsher environments, selecting components with proven longevity, like the DD175N34K, becomes a key strategic advantage, directly contributing to a lower Total Cost of Ownership (TCO) for the end equipment.
B7. FAQ
What is the primary benefit of the DD175N34K's pressure contact technology?
Its primary benefit is enhanced long-term reliability. By eliminating solder layers, the module is significantly more resistant to failures caused by thermal cycling, which is a common issue in applications with fluctuating loads like motor drives.
How does the 3400V VRRM rating impact system design for industrial applications?
The high reverse voltage rating provides a substantial safety margin, making the module highly suitable for rectifier circuits connected to 690V AC lines and above. This robustness protects the system against common line voltage transients and surges, preventing component failure and improving overall system dependability.
Is this module suitable for paralleling to achieve higher current output?
While the datasheet provides the necessary characteristic curves, successful paralleling of diode modules requires careful consideration of thermal balancing and busbar design to ensure equal current sharing. It is recommended to consult detailed application notes from Infineon on this topic to ensure a reliable implementation.
Engineered for Endurance
The DD175N34K distinguishes itself not just by its high voltage and current ratings, but by its intrinsic design for longevity. For engineers developing next-generation industrial power systems, where uptime is a critical performance metric, this module offers a dependable foundation built to withstand the rigors of continuous, high-stress operation. Its design philosophy prioritizes the reduction of common failure mechanisms, making it a strategic component choice for building resilient and cost-effective power conversion equipment.
