Content last revised on February 2, 2026
TD240N16SOF Infineon 1600V 240A Thyristor/Diode Module
The TD240N16SOF, an Infineon Thyristor/Diode Module, represents a high-efficiency solution for phase control and rectification in industrial power systems. Engineered with pressure-contact technology, this 50mm Power Block module provides exceptional reliability for applications requiring 1600V blocking capability and a 240A mean on-state current. It effectively addresses the engineering challenge of thermal fatigue in heavy-duty cycles by replacing traditional solder bonds with a robust mechanical clamping system, ensuring long-term stable operation in harsh electrical environments.
UVP: Industrial-grade 1600V phase control with pressure-contact reliability to eliminate thermal fatigue in high-surge applications.
Top Specs: 1600V | 240A | Rth(j-c) 0.124 K/W.
Key Benefits: Exceptional surge current handling; minimized thermal resistance.
For engineers designing 480V or 600V industrial systems, the 1600V rating of this module provides the necessary voltage overhead to manage line transients without sacrificing performance.
For 690V industrial drives prioritizing thermal margin, this 1600V module is the optimal choice.
Key Parameter Overview
Decoding technical specifications for high-power system integration
| Main Characteristics | Value (Unit) | Engineering Significance |
|---|---|---|
| Repetitive Peak Voltage (VDRM/VRRM) | 1600V | Essential for 400V-600V AC line safety margins. |
| Mean On-State Current (ITAVM) | 240A (@ Tc=85°C) | Defines the continuous power handling capacity. |
| Surge On-State Current (ITSM) | 7500A (@ 10ms, 25°C) | Critical for fuse coordination and fault protection. |
| I²t Value | 281,000 A²s | Maximum thermal energy allowed during short circuits. |
| Thermal Resistance (Rthjc) | 0.124 K/W | Determines heatsink size and junction temp safety. |
Download the TD240N16SOF datasheet for detailed specifications and performance curves.
Application Scenarios & Value
Optimizing system performance in motor control and power conversion
The TD240N16SOF is a preferred component for input rectification in Variable Frequency Drives (VFD) and Soft Starters. In industrial environments, engineers often face the challenge of high inrush currents when starting massive induction motors. For instance, in an industrial conveyor motor system, the Surge On-State Current (ITSM) of 7500A allows the module to withstand the initial current spike without degradation. This high-surge capability simplifies the design of protective circuits, often reducing the need for oversized bypass components.
Beyond motor control, this module is frequently integrated into Static Switches and UPS systems where seamless power transition is required. The 1600V blocking voltage ensures that the system complies with IEC 61800-3 standards for EMC and transient immunity in 400V mains. When systems demand even higher current density, the related SKKD162/16 offers a different footprint while maintaining high voltage isolation. For comprehensive design insights, engineers should refer to our guide on the core trio of power module selection.
Technical Deep Dive
The structural advantage of pressure-contact technology
The defining characteristic of the TD240N16SOF is its pressure-contact architecture. Unlike solder-based modules, where repeated thermal expansion and contraction can lead to delamination and increased contact resistance over time, the pressure-contact design uses internal mechanical springs to maintain electrical and thermal conductivity. Think of this technology like a high-performance engine head gasket: the constant, uniform clamping force prevents the internal interfaces from shifting or failing under the extreme thermal expansion that occurs during peak load operations.
This structure directly impacts the Thermal Resistance (Rthjc) of 0.124 K/W. By ensuring a more consistent path for heat to travel from the silicon die to the copper baseplate, the module can operate at higher power densities without exceeding the maximum junction temperature. For engineers, this translates to a more compact heatsink design and enhanced system longevity. Understanding these dynamics is crucial for unlocking thermal performance in modern power electronics.
Technical FAQ
How does the ITSM rating of 7500A influence fuse selection for the TD240N16SOF?
The 7500A surge rating, paired with an I²t of 281,000 A²s, defines the "melting window" for the semiconductor. To protect the module, the chosen high-speed fuse must have an I²t clearing value lower than 281,000 A²s to ensure the fuse blows before the silicon reaches its thermal failure point during a short circuit.
Why is a 1600V rating necessary for a standard 400V or 480V AC line?
Standard industrial lines are prone to voltage transients from inductive load switching. A 1600V repetitive peak voltage provides a safety factor of over 2.5x the line voltage peak, preventing the TD240N16SOF from entering uncontrolled avalanche breakdown during common grid fluctuations.
What is the primary benefit of the pressure-contact design compared to solder?
Enhanced long-term reliability by eliminating solder fatigue. By using mechanical pressure, the TD240N16SOF avoids the micro-cracking of solder layers that typically occurs during frequent power cycling, significantly extending the service life in applications like soft starters.
How does the Rth(j-c) of 0.124 K/W affect the thermal design of a VFD input stage?
The low Rth(j-c) allows for efficient heat dissipation. This means for every 100W of power dissipated, the temperature difference between the junction and the case is only 12.4°C. This efficiency enables engineers to use smaller cooling fans or more compact heatsinks, improving the overall power density of the drive.
As industrial power requirements move toward higher efficiency and smaller footprints, the TD240N16SOF remains a strategic choice for high-availability systems. Its balance of high surge tolerance and thermal stability aligns with the global shift toward more resilient industrial automation and smart grid infrastructure.
