Content last revised on February 26, 2026
2RI100G-160: A 1600V, 100A Dual Diode Module for Robust High-Power Rectification
The 2RI100G-160 is a high-reliability dual diode module from Fuji Electric, delivering robust performance in high-voltage industrial power systems through superior thermal management and surge survivability. With core specifications of 1600V, 100A, and a junction-to-case thermal resistance of 0.20°C/W, this module provides enhanced thermal stability and simplifies system assembly. Its high V_RRM offers a critical safety margin against voltage transients in industrial grids, while the low thermal resistance ensures stable operation under continuous load. For high-voltage DC power supplies where thermal headroom and surge robustness are paramount, the 2RI100G-160 offers a decisive engineering advantage.
Key Parameter Overview
Unpacking the Ratings for Robust System Design
The performance of the 2RI100G-160 is defined by its electrical and thermal characteristics, which are critical for designing reliable and efficient power conversion systems. The ratings below are specified at a case temperature (Tc) of 25°C unless otherwise noted.
| Absolute Maximum Ratings | ||
| Parameter | Symbol | Value |
| Repetitive Peak Reverse Voltage | VRRM | 1600V |
| Average Output Current (Tc=98°C) | IO | 100A |
| Surge Forward Current (10ms, half sine wave) | IFSM | 1200A |
| Operating Junction Temperature | Tj | -40 to +150°C |
| Isolation Voltage (AC, 1 min.) | Viso | 2500V |
| Electrical & Thermal Characteristics | ||
| Parameter | Conditions | Max Value |
| Forward Voltage Drop | IFM = 320A | 1.40V |
| Repetitive Peak Reverse Current | Tj = 150°C, VR = VRRM | 30mA |
| Thermal Resistance (Junction to Case) | Rth(j-c) | 0.20°C/W |
| Thermal Resistance (Case to Fin, with grease) | Rth(c-f) | 0.10°C/W (Typical) |
Download the 2RI100G-160 datasheet for detailed specifications and performance curves.
Application Scenarios & Value
Enhancing Reliability in Industrial Power Conversion
The 2RI100G-160 is engineered to thrive in demanding industrial environments where voltage and current stresses are significant. Its combination of a high 1600V breakdown voltage and a 100A current rating makes it a prime candidate for the front-end rectifier stages of high-power equipment.
A key application is in Variable Frequency Drive (VFD) systems operating on 480V or higher industrial AC lines. In this scenario, the module’s 1600V VRRM provides a substantial safety margin against the voltage spikes and line transients inherent in factory settings, preventing rectifier failure and ensuring system uptime. Furthermore, its impressive 1200A surge current capability allows it to withstand the inrush currents that occur during motor startup without degradation. The dual diode configuration also makes it suitable for use as a high-power freewheeling diode to manage energy from regenerative braking. While the 2RI100G-160 is optimized for 480V-690V industrial lines, for applications on 200V-400V systems, the related 6RI100E-080 offers a different voltage and performance profile. The module's performance is fundamental to an effective thermal design, ensuring long-term operational stability in applications like:
- Power supply units for DC motors and servo drives
- High-capacity battery charging stations
- Uninterruptible Power Supplies (UPS) for data centers
- Welding power supplies
What is the primary benefit of its 1600V rating? It provides a crucial safety margin against overvoltage in industrial power systems.
Technical Deep Dive
Inside the Insulated Module: A Focus on Thermal Efficiency and Isolation
Two often-overlooked features that deliver significant engineering value in the 2RI100G-160 are its thermal resistance and insulated package design. The module's low thermal resistance of 0.20 °C/W acts like a wide-open drain pipe for heat, allowing thermal energy to escape the semiconductor junction quickly and efficiently. A higher thermal resistance would be like a clogged drain, causing heat to back up, increasing junction temperature, and ultimately reducing the component's lifespan and reliability. This excellent thermal transfer capability allows designers to either extract maximum performance at a given temperature or to specify a smaller, more cost-effective heatsink, contributing to higher overall power density.
Complementing this is the module's 2500V AC isolation voltage. This integrated isolation means the module's baseplate is electrically insulated from the active semiconductor terminals. How does its insulated base simplify design? It allows direct mounting to a grounded chassis or a common heatsink shared with other power components without requiring separate, often fragile and thermally inefficient, insulating pads like mica or silicone. This simplification reduces the bill of materials, lowers assembly time and cost, and creates a more robust mechanical and thermal interface, enhancing long-term system reliability in demanding Variable Frequency Drives.
Frequently Asked Questions
Engineering Inquiries on the 2RI100G-160
How does the 1600V VRRM rating of the 2RI100G-160 benefit industrial drive designs?
The 1600V rating provides a critical safety margin, particularly for drives running on 480V or 575V AC lines. It ensures the diode can safely block reverse voltages during normal operation and withstand the transient voltage spikes common in industrial environments, directly improving system robustness and preventing catastrophic failures.
What is the practical impact of the Rth(j-c) value of 0.20 °C/W on thermal design?
This low thermal resistance signifies highly efficient heat transfer from the diode junction to the module case. For an engineer, this means a lower temperature rise for a given power dissipation. This allows for the use of a smaller heatsink, operation at higher ambient temperatures, or increased power throughput, all of which contribute to a more compact, cost-effective, and reliable system.
Can the 2RI100G-160 be used as a freewheeling diode in an inverter circuit?
Yes, its fast recovery characteristics, high current handling, and robust thermal performance make it well-suited for use as a freewheeling or anti-parallel diode in inverter and chopper circuits. It can effectively manage the inductive energy from motor loads during the switching off-state of an IGBT or MOSFET, protecting the switch from overvoltage.
For your next high-voltage power project requiring dependable rectification and superior thermal stability, the Fuji Electric 2RI100G-160 presents a compelling solution. Contact our technical sales team to discuss your application requirements or to request a quote.
