Content last revised on August 28, 2026
The TZ240N36KOF by Infineon is a high-performance single thyristor module. It is rated for 3600V and 240A with a low thermal resistance of 0.078 K/W.
What is the primary benefit of the pressure contact design? Enhanced long-term reliability by eliminating solder fatigue.
How does the high voltage rating prevent system failure? A 3600V rating provides high voltage margins against grid transient surges.
Application Scenarios & Value
Achieving System-Level Benefits in High-Voltage Phase Control
For medium-voltage grid systems requiring high transient surge tolerance, this 3600V thyristor module is the optimal choice. Engineers often face high voltage fluctuations and severe current surges in medium-voltage industrial environments. These systems include motor drives, wind energy converters, and uninterruptible power supplies (UPS). In these setups, transient spikes from the grid can easily destroy lower-rated semiconductors. The TZ240N36KOF addresses this by providing a massive 3600V repetitive peak blocking voltage.
For instance, when starting heavy industrial motors, a system experiences substantial inrush currents. The TZ240N36KOF features a non-repetitive surge on-state current of 5500A (ITSM) and an I2t rating of 151 kA²s. This lets it handle short grid spikes without degraded performance. Using this module in phase-controlled rectifiers or soft starters increases the voltage safety margin. This minimizes the need for complex snubber configurations.
In contrast, for systems requiring lower voltage ratings or dual-SCR setups, alternative modules like the TT162N16KOF or SKKT250/16E can be considered. However, the high-voltage capability of the TZ240N36KOF remains critical for 690V line systems or high-power industrial rectifiers.
Technical & Design Deep Dive
Analyzing the Pressure-Contact Design for Long-Term Thermal Stability
The physical construction of the TZ240N36KOF is central to its electrical robustness. Unlike standard solder-bonded modules, this thyristor employs pressure contact technology. To understand why this matters, think of a solder joint as a bridge made of glue under constant heavy traffic. Over time, the constant vibration and heating-cooling cycles cause the glue to crack. In contrast, pressure contact is like a bridge held together by heavy gravity. There is no glue to crack, so it remains electrically and mechanically connected despite physical stress.
This design eliminates solder fatigue, which is the leading cause of failure in high-power cycles. The internal silicon wafer is compressed under high force against the copper base plate. This direct mechanical contact achieves a low junction-to-case thermal resistance (Rth(j-c)) of 0.078 K/W. This low thermal resistance enables the device to quickly dissipate heat, maintaining a maximum junction temperature (Tvj max) of 125°C.
When designing gate drives for this module, engineers should target a gate trigger current (IGT) of 250mA. This ensures rapid and uniform turn-on across the silicon area, preventing localized hot spots. Detailed guidelines on this can be found in resources discussing thermal management and gate drive design. Understanding these thermal characteristics is crucial for sizing heatsinks and ensuring the system operates within its Safe Operating Area. For comprehensive selection parameters across different topologies, engineers can refer to the power semiconductor selection guide.
Key Parameter Overview
Decoding the Specs for Enhanced Industrial Reliability
The table below outlines the core electrical and thermal parameters of the TZ240N36KOF, emphasizing their functional significance in system design.
| Parameter | Specification Value | Engineering Value & Interpretation |
|---|---|---|
| Repetitive Peak Off-State/Reverse Voltage (VDRM / VRRM) | 3600V | Ensures high voltage safety margin for 690V AC industrial grid lines. |
| Average On-state Current (ITAV) | 240A (at TC = 85°C) | Provides sustained power handling capability for heavy industrial rectifiers. |
| Surge On-state Current (ITSM) | 5500A (at 10ms, Tvj max) | Protects the circuit against sudden grid transients and startup overload events. |
| Max Junction Temperature (Tvj max) | 125°C | Limits peak operating temperature for sustained component lifespan. |
| Thermal Resistance, Junction to Case (Rth(j-c)) | 0.078 K/W | Enables efficient heat dissipation, reducing heatsink volume requirements. |
| Gate Trigger Current (IGT) | 250mA (maximum) | Defines minimum control signal to ensure clean and synchronous turn-on. |
Download the TZ240N36KOF datasheet for detailed specifications and performance curves.
Frequently Asked Questions
Addressing High-Power Integration Concerns
- What is the primary benefit of the pressure contact design?Pressure contact design eliminates solder fatigue, which significantly enhances the module's lifetime under heavy thermal cycling conditions.
- How does the high voltage rating prevent system failure?The 3600V blocking voltage provides a robust safety margin, preventing device breakdown during high-voltage transient spikes from the grid.
- How does the Rth(j-c) of 0.078 K/W impact heatsink selection?The low 0.078 K/W thermal resistance ensures rapid heat dissipation, allowing for smaller heatsinks and higher system power density.
- What is the significance of the 5500A surge on-state current (ITSM) for industrial systems?The 5500A surge rating allows the module to withstand brief, severe overload currents, such as motor-starting surges, without damage.
- Can the TZ240N36KOF be used in 690V AC line applications?Yes, the 3600V rating provides an exceptionally high voltage margin, which is ideal for rugged 690V AC grid applications.
From a practical integration standpoint, matching the gate trigger requirements and thermal properties of the TZ240N36KOF ensures stable operation in demanding industrial grid environments.
