2RI100E-080 Fuji Electric 800V 100A Fast Recovery Diode Module

Content last revised on January 31, 2026

2RI100E-080 | Fuji 800V 100A Dual Diode Module | Engineering Data

Product Overview: Key Specifications and Engineering Value

The Fuji Electric 2RI100E-080 is a highly reliable and electrically robust 800V, 100A dual diode module engineered for safe and efficient power rectification in demanding industrial environments. Featuring key specifications of 800V VRRM | 100A IF(AV) | 2500V Viso, this module delivers an enhanced safety margin and superior thermal performance. It directly addresses the need for robust rectification in systems operating on fluctuating industrial power grids. For medium-power VFD input stages requiring high electrical isolation and thermal stability, the 2RI100E-080 is an optimal front-end solution.

Key Parameter Overview

Decoding the Specs for Thermal Stability and Electrical Robustness

The technical specifications of the 2RI100E-080 are tailored for industrial power conversion systems where reliability and safety are paramount. The parameters highlighted below are critical for design evaluation and thermal modeling.

Download the 2RI100E-080 datasheet for detailed specifications and performance curves.

Application Scenarios & Value

System-Level Benefits in Industrial Power Conversion

The 2RI100E-080 is engineered for core power conversion tasks such as the input rectification stage of AC drives, DC power supplies, and inverters. What is the primary benefit of its robust ratings? Enhanced system uptime and safety in harsh electrical environments.

Consider its use in the input bridge of a Variable Frequency Drive (VFD) operating from a 380V or 400V three-phase line. The engineering challenge is to create a reliable DC bus while withstanding common line voltage transients and managing heat within a compact industrial enclosure. The 800V VRRM rating provides a substantial safety margin, well above the peak voltage of a 400V AC line, protecting the module from typical grid disturbances. This robustness is critical for avoiding catastrophic failure and ensuring continuous operation in factory settings. Furthermore, its efficient thermal design is key to long-term performance, a topic further explored in our guide on preventing thermal failure.

For applications demanding significantly higher current capacity, a related module such as the SKKD162/16 offers an increased current rating for higher power systems.

Technical Deep Dive

Analysis of Electrical Isolation and Thermal Design Implications

Two often-overlooked parameters that define a module's suitability for industrial use are its isolation voltage and thermal resistance. The 2RI100E-080's 2500V isolation rating is a critical safety feature. Think of this isolation barrier as the electrical "soundproofing" between the high-power circuit and the grounded metal chassis of the equipment. It prevents dangerous fault currents from reaching the external structure, safeguarding personnel and downstream control electronics. This high level of isolation simplifies adherence to safety standards like IEC 60747, reducing the complexity and cost of the overall system's safety certification.

Concurrently, the module's thermal resistance (Rth(j-c)) of 0.30 °C/W is a direct indicator of its heat dissipation efficiency. This value acts like the diameter of a pipeline for heat; a lower number signifies a wider pipe, allowing waste heat to move away from the active silicon junction to the heatsink more effectively. For a design engineer, this low Thermal Resistance translates into a lower junction temperature for a given load, which is the single most important factor for improving the lifespan and reliability of a power semiconductor.

Frequently Asked Questions (FAQ)

Engineering Questions Answered

What is the significance of the 2500V isolation voltage for a system designer?

The 2500V isolation rating provides a robust safety barrier between the high-voltage power circuit and the system's chassis and low-voltage control circuits. This is crucial for meeting industrial safety regulations, preventing electrical shock hazards, and protecting sensitive monitoring electronics from high-voltage damage, thereby simplifying the overall safety architecture of the end equipment.

How does the 0.30 °C/W thermal resistance per arm influence heatsink selection?

A low thermal resistance of 0.30 °C/W indicates efficient heat transfer from the diode junction to the module's baseplate. This allows designers to either use a smaller, more cost-effective heatsink for a given power dissipation or to operate the module at higher currents while maintaining a safe junction temperature. It directly impacts system power density and thermal management costs.

Can the 2RI100E-080 be used as a freewheeling diode?

While the 2RI100E-080 is primarily designed for rectification applications due to its standard recovery characteristics, it can be considered for freewheeling purposes in low-frequency applications (typically line frequency or slightly higher) where reverse recovery speed is not the dominant performance factor. For high-frequency switching applications, a dedicated Fast Recovery Diode (FRD) would be more suitable.

Strategic Integration for Long-Term System Reliability

Achieving Lower Total Cost of Ownership Through Robust Design

Integrating the 2RI100E-080 into a power system is a strategic decision that prioritizes long-term operational reliability. By selecting a component from a reputable manufacturer like Fuji Electric with conservative voltage overhead and excellent thermal performance, engineers can mitigate risks associated with grid instability and thermal stress. This design choice contributes to a lower total cost of ownership by reducing field failures, minimizing service calls, and extending the operational life of the entire power conversion system. For further reading on component testing, refer to our practical guide on how to test modules with a multimeter.