Infineon K40T120: High-Performance 1200V IGBT for Robust Power Switching Applications
In the realm of power electronics, achieving a balance between high efficiency, ruggedness, and thermal performance is paramount. The Infineon K40T120 stands out as a premier 1200V IGBT (Insulated Gate Bipolar Transistor) engineered specifically to meet the demanding requirements of robust power switching applications. This device encapsulates advanced semiconductor technology, offering system designers a superior combination of low saturation voltage and fast switching capabilities.
A key highlight of the K40T120 is its low VCE(sat) characteristic, which directly translates to reduced conduction losses. This is particularly critical in high-power circuits where minimizing energy waste as heat is essential for overall system efficiency and thermal management. Furthermore, this IGBT features a positive temperature coefficient, which simplifies the paralleling of multiple devices. This inherent characteristic ensures current is shared evenly across paralleled IGBTs, enhancing reliability and enabling the design of very high-current modules without the risk of thermal runaway.
The robust 1200V voltage rating makes the K40T120 exceptionally suited for a wide array of industrial and automotive environments where voltage spikes and harsh conditions are common. It is an ideal choice for applications such as:
Industrial motor drives and inverters

Uninterruptible Power Supplies (UPS)
Welding equipment
Induction heating systems
Renewable energy inverters
The device is offered in the industry-standard TO-247 package, which provides excellent thermal performance and simplifies mechanical mounting to heatsinks. This ensures that the heat generated during operation is effectively dissipated, maintaining the junction temperature within safe operating limits and thereby guaranteeing long-term reliability.
ICGOOODFIND: The Infineon K40T120 is a high-performance 1200V IGBT that delivers an optimal blend of low conduction loss, ruggedness, and parallel operation capability, making it a top-tier solution for demanding power switching designs across industrial and automotive sectors.
Keywords: IGBT, 1200V, Low VCE(sat), Power Switching, Robustness
