Content last revised on April 24, 2026
IRKT162/16 Thyristor/Diode Module Datasheet & Specs
Engineered for exceptional thermal stability, the Vishay IRKT162/16 Thyristor/Diode Module delivers sustained reliability in high-current power control systems. It integrates a glass-passivated thyristor and diode in a high-conductivity package, providing a robust foundation for demanding industrial applications. How does the IRKT162/16's construction enhance system reliability? Its electrically isolated baseplate streamlines thermal design and mitigates mounting-related electrical risks, directly contributing to a more resilient and easily serviceable final product.
Operational Contexts: Where Thermal Stability is Paramount
The IRKT162/16 module is designed for power conversion and control circuits where consistent performance under thermal load is a primary engineering requirement. Its robust construction and thermal efficiency make it a suitable component for a range of industrial systems.
- Industrial Motor Control: Excels in AC motor soft starters and DC motor drives, where it manages high inrush currents while maintaining thermal equilibrium, extending the motor and drive's operational lifespan.
- Power Supply & Rectification: Ideal for controlled and uncontrolled rectifier circuits, such as those found in welding power supplies, battery chargers, and uninterruptible power supplies (UPS). The module's high isolation voltage enhances safety in these applications.
- Heating and Lighting Control: Provides precise phase-angle control for large industrial heating elements and high-power lighting systems, with its thermal design ensuring stability during continuous operation.
For controlled rectifier circuits up to 1600V where thermal cycling is a concern, the IRKT162/16's low Rth(j-c) of 0.12 K/W per junction offers a clear reliability advantage.
A Closer Look at the Thermally-Optimized Architecture
The design of the IRKT162/16 centers on achieving long-term reliability through superior thermal management. At its core, the module utilizes glass-passivated semiconductor chips. This process seals the active junction area with a layer of glass, protecting it from environmental contaminants and ensuring stable electrical characteristics over many years of service. What is the key benefit of the IRKT162/16's isolated baseplate? It simplifies mounting and enhances electrical safety.
The entire assembly is housed in an INT-A-PAK (ADD-A-PAK) package, which features a high-conductivity baseplate that is electrically isolated. This architecture offers two distinct engineering benefits. First, it creates an efficient pathway for heat to be drawn away from the semiconductor junctions to an external heatsink. Second, the built-in 2500V RMS isolation simplifies mechanical assembly by eliminating the need for separate insulating pads, reducing both component count and potential points of failure. This integrated approach to thermal transfer and electrical isolation is a cornerstone of the module's design for durability.
Key Performance Specifications for Thermal Design
Evaluating the IRKT162/16 for your application requires focusing on the parameters that directly influence its thermal behavior and electrical limits. The following specifications are crucial for system integration and reliability modeling.
| Parameter | Value |
|---|---|
| Repetitive Peak Reverse Voltage (VRRM) | 1600 V |
| Average On-State Current (IT(AV)) | 160 A (@ TC = 85°C) |
| Thermal Resistance, Junction to Case (Rth(j-c)) | 0.12 K/W (per junction, max) |
| RMS Isolation Voltage (VISOL) | 2500 V |
| Surge Current (ITSM) | 3570 A (50 Hz, 10 ms) |
| Maximum Junction Temperature (TJ max) | 130 °C |
Download the Datasheet for complete electrical and thermal characteristics.
Strategic Advantages in Industrial Power Systems
Integrating the IRKT162/16 provides a strategic benefit beyond its immediate function. In the context of Industry 4.0 and the increasing demand for system uptime, component longevity is a key factor in calculating the total cost of ownership (TCO). The module's use of glass passivation is a direct contributor to this longevity, ensuring predictable performance and reducing the likelihood of premature field failures. Furthermore, its UL E78996 approval can streamline the safety certification process for the end system, a critical consideration for products intended for the North American and global markets. This pre-certification represents a tangible reduction in compliance-related project time and expense.
Deployment Example: Enhancing Soft Starter Longevity
A common deployment for the IRKT162/16 is within the power stage of a three-phase soft starter for an AC induction motor. In this role, three modules (one per phase) are used to gradually increase the voltage applied to the motor, reducing mechanical stress and electrical inrush current. During the ramp-up phase, the thyristors are phase-controlled, generating significant heat. The module's low thermal resistance becomes critical, ensuring the junction temperature stays well within its safe operating area. The electrically isolated baseplate simplifies the mounting of all three modules onto a common heatsink, creating a compact and thermally efficient power assembly that is built for a long service life in harsh industrial environments.
Data-Informed Selection for Your Power Stage
The technical data for the IRKT162/16 supports its use in high-reliability power control circuits. When comparing components, it is essential to look at the complete thermal and electrical profile. While this module provides a robust solution for a wide array of applications, designs requiring higher current handling or different topologies may warrant evaluation of other components. For example, systems with significantly higher current demands might be evaluated against a module like the SKKD380/18, which offers a higher current rating in a different package format. The purpose of this data is to empower engineers to make an informed decision based on the specific electrical, thermal, and mechanical requirements of their project.
Technical Inquiries on the IRKT162/16
What is the primary benefit of the glass passivation used on the IRKT162/16's chips?
Glass passivation creates a hermetic seal around the silicon die's junction. This protects it from moisture and contaminants that could cause electrical characteristics to drift over time or lead to premature failure. It is a key technology for ensuring long-term stability and reliability in industrial environments.
How does the thermal resistance of 0.12 K/W impact heatsink selection?
This value, also expressed as 0.12 °C/W, is a measure of how effectively heat can travel from the semiconductor junction to the module's case. A lower number is better. It's like a wider pipe for heat flow. This low value means the module can transfer heat efficiently, allowing for the use of a smaller, more cost-effective heatsink for a given power dissipation compared to a module with higher thermal resistance.
What does the "Doubler, Center-Tap, Common Anode" configuration mean for circuit design?
This topology, often used in bi-phase rectifiers, contains one thyristor and one diode sharing a common anode connection. It allows for the control of both positive and negative half-cycles of an AC waveform using a single control signal for the thyristor, while the diode provides the return path. It's an efficient way to build controlled rectifiers for applications like DC motor speed control.
Are there special mounting considerations for the ADD-A-PAK package?
While the isolated baseplate simplifies mounting, it's crucial to ensure a flat, clean mounting surface and the correct application of thermal grease to minimize contact thermal resistance. Following the manufacturer-recommended torque specifications for the mounting screws is also essential to ensure optimal thermal contact without inducing mechanical stress on the module.
By leveraging a design that prioritizes thermal dissipation and long-term component stability, the IRKT162/16 Thyristor/Diode Module provides a reliable building block for the next generation of efficient and durable industrial power systems. Its certified safety and robust construction are engineered to meet the lifecycle demands of modern industrial infrastructure. For further details on power component selection, consider exploring this guide on unlocking thermal performance.