Content last revised on February 26, 2026
T508N16 Infineon Eupec 1600V 508A Phase Control Thyristor
High-Efficiency Phase Control for Demanding Industrial Power Grids
The T508N16, manufactured by Infineon (formerly Eupec), is a robust Phase Control Thyristor (Netz-Thyristor) engineered for high-power rectification and AC control. Designed to thrive in 1600V applications, this 508A (Tc=85°C) component provides the thermal stability and surge current resilience required by industrial-grade motor drives and power converters. It addresses the critical engineering challenge of minimizing on-state losses while maintaining a high repetitive peak reverse voltage of 1600V, ensuring long-term reliability in environments prone to line voltage fluctuations.
For systems requiring high-reliability power regulation, the T508N16 stands as a benchmark for ruggedness. It is often compared to the related SKKH106/16E for smaller footprint designs or the SKKT250/16E for modular integration, though the T508N16 offers significantly higher current density for discrete assembly.
1600V | 508A | 800A (RMS) | Tvj max 125°C
Application Scenarios & Value
Achieving System-Level Benefits in High-Power Industrial Rectification
In the world of heavy machinery, the T508N16 serves as the backbone for Variable Frequency Drives (VFD) and Soft Starters. Engineers often face the problem of high inrush currents during the startup of massive induction motors. The T508N16 solves this with a superior non-repetitive peak on-state current (ITSM), typically rated in the thousands of amperes for short durations, allowing it to absorb the "startup shock" without degrading the silicon lattice.
Beyond motor control, this thyristor is a critical component in High-Power DC Power Supplies and Battery Charging Systems for industrial vehicle fleets. Its ability to maintain precise phase control enables uninterruptible power supply (UPS) systems to regulate output with minimal harmonic distortion. For engineers designing 690V industrial line converters, this 1600V module provides the necessary safety margin against transient spikes, significantly lowering the Total Cost of Ownership (TCO) by reducing unscheduled maintenance.
Key Parameter Overview
Decoding the Specs for Enhanced Thermal and Electrical Reliability
| Parameter Symbol | Technical Specification | Engineering Value |
|---|---|---|
| VDRM / VRRM | 1600 V | High voltage overhead for 400V-500V line systems. |
| ITAVM | 508 A (at Tc = 85°C) | High average current handling for heavy-duty loads. |
| ITRMS | 800 A | RMS current limit for continuous operation. |
| Tvj max | 125 °C | Extended junction temperature for thermal margin. |
| Package Type | Disc / Capsule | Pressure-contact design for superior thermal cycling. |
Download the T508N16 datasheet for detailed specifications and performance curves.
Technical & Design Deep Dive
The Pressure-Contact Advantage for Extreme Power Density
The T508N16 utilizes a pressure-contact assembly rather than a soldered wire-bond structure. This is analogous to how a high-performance brake pad is clamped to a rotor—the direct, uniform pressure ensures that heat is extracted evenly across the entire surface of the silicon wafer. In high-current applications, this eliminates the "solder fatigue" failure mode common in smaller modules, where repeated thermal expansion and contraction eventually crack the internal joints.
Furthermore, the low on-state voltage (VT) of this device behaves like a wide-diameter pipe for electrical current; it allows massive amounts of energy to flow through with very little friction (power loss). This efficiency directly impacts heatsink selection. By reducing the Rth(j-c) (thermal resistance from junction to case), engineers can use smaller cooling systems or operate at higher ambient temperatures without risking thermal runaway. This is especially vital in welding power supplies where the duty cycle is frequent and aggressive.
Frequently Asked Questions
Engineering Insights for T508N16 Implementation
- How does the 1600V repetitive peak reverse voltage rating affect safety margins in 480V systems?
For a 480V AC line, the peak voltage is approximately 678V. A 1600V rating provides a safety factor of over 2x, which is essential to withstand inductive load spikes and line transients common in industrial grids. - What are the primary considerations for mounting the T508N16 capsule package?
Uniform clamping force is critical. Incorrect pressure can lead to localized hot spots or poor electrical contact, effectively "choking" the current flow and leading to premature failure of the 508A rated device. - Can this device be used in high-frequency switching applications?
As a Phase Control Thyristor, it is optimized for 50/60Hz line commutation. While it can handle Phase Control for AC dimming or rectification, it is not suitable for the kHz-range switching found in IGBT-based inverters.
As a leading technical distributor, we provide the T508N16 to empower your engineering decisions with fact-based performance data. Whether you are retrofitting legacy Eupec systems or designing next-generation power converters, this Infineon thyristor remains a standard for reliability in the 1.6kV class.
