FZ1200R33KL2 Infineon 3300V 1200A High-Power IGBT Module

Content last revised on February 8, 2026

FZ1200R33KL2: A High-Voltage IGBT Module for Megawatt-Scale Power Conversion

The Infineon FZ1200R33KL2 is a high-power IGBT module engineered for exceptional thermal reliability in multi-megawatt, medium-voltage power conversion systems. With core specifications of 3300V, 1200A, and an impressively low thermal resistance of 0.015 K/W, this module provides the foundation for robust and power-dense designs. Key benefits include the ability to unlock higher power density and simplify the architecture of medium-voltage systems. Its robust 3300V blocking voltage makes it a primary building block for the next generation of high-efficiency wind turbine converters and industrial drives. For multi-megawatt converters requiring maximum thermal headroom, this 3300V module with its ultra-low Rth is the definitive choice.

Key Parameter Overview

A Specification Breakdown for High-Reliability System Design

The technical specifications of the FZ1200R33KL2 are optimized for performance and longevity in high-stress, medium-voltage environments. The module's parameters underscore its suitability for applications where thermal management and electrical stability are non-negotiable. What is the primary benefit of its high-voltage design? It enables simpler, more reliable converter topologies for medium-voltage grids.

Download the FZ1200R33KL2 datasheet for detailed specifications and performance curves.

Application Scenarios & Value

System-Level Value in Medium-Voltage Power Conversion

The FZ1200R33KL2 is engineered as a foundational component for power electronics operating at the megawatt scale. Its high blocking voltage and current handling capabilities are critical for creating efficient and reliable systems that interface directly with medium-voltage infrastructure.

A primary application is in the nacelle of multi-megawatt Wind Turbine Converters. In this demanding scenario, the 3300V VCES allows engineers to design generator-side converters with simpler topologies, avoiding the complexities and potential failure points of connecting lower-voltage IGBTs in series. The module's robust current rating of 1200A handles the high energy throughput from modern wind generators. Furthermore, its exceptionally low thermal resistance becomes a decisive factor for reliability. It ensures efficient heat dissipation, keeping the IGBT junction temperature within safe limits even during peak power production on gusty days, which directly contributes to a longer operational lifespan and reduced system downtime. This level of thermal performance is also crucial for grid-support systems like STATCOM (Static Synchronous Compensator) and heavy-duty Medium-Voltage Drives (MVD) used in mining and marine propulsion. While the FZ1200R33KL2 is designed for medium-voltage grids, for standard 400V/690V industrial systems, the related FZ1200R12KF5 offers a well-matched 1200V rating.

Technical Deep Dive

Interpreting Thermal Resistance for Maximizing Power Throughput

One of the most critical parameters for a high-power module like the FZ1200R33KL2 is its thermal resistance, specifically the junction-to-case value (Rth(j-c)). At 0.015 K/W, this module demonstrates superior thermal efficiency. But what does this number mean for a design engineer? Think of thermal resistance as the narrowness of a hallway for heat trying to escape. A lower Rth value, like the one in this module, is like a wide, unobstructed corridor, allowing heat to move away from the sensitive IGBT chip quickly and efficiently. A higher Rth value would be a narrow, crowded hallway, causing a "traffic jam" of heat that rapidly increases the chip's temperature under load.

This low thermal resistance provides tangible engineering advantages. It directly translates to a lower temperature rise at the semiconductor junction for every watt of power dissipated. This benefit can be leveraged in several ways: for a given cooling system, the module can be operated at a higher output current; alternatively, a smaller, more cost-effective heatsink can be used for the same output power, improving the overall power density and cost of the converter. This is a core principle of effective IGBT thermal management.

Frequently Asked Questions

Engineering Questions on the FZ1200R33KL2

How does the 3300V Vces rating of the FZ1200R33KL2 simplify the design of high-power converters?
The 3300V rating allows direct connection to medium-voltage DC links, which are common in applications like large-scale renewable energy inverters and industrial drives. This eliminates the need to connect multiple lower-voltage IGBTs in series, a technique that introduces significant complexity in ensuring equal voltage sharing, requires additional balancing components, and increases potential points of failure. A single, high-voltage switch like this module results in a more reliable, compact, and easier-to-design power stage.

What is the practical benefit of the module's low thermal resistance (Rth(j-c)) of 0.015 K/W?
A low Rth(j-c) means more efficient heat transfer from the silicon chip to the module's baseplate. For a design engineer, this provides greater thermal headroom. It allows the module to handle higher power losses without exceeding its maximum junction temperature of 125°C, enabling higher system power density. Alternatively, it permits the use of smaller or lower-cost heatsinks while maintaining operational reliability, which is crucial for optimizing the total cost of ownership in large-scale deployments like wind turbines.

For engineers and procurement managers evaluating components for next-generation medium-voltage converters, the FZ1200R33KL2 offers a compelling combination of high-voltage capability and superior thermal management. To assess its fit for your specific application, contact our technical sales team for further information and quoting.