Mitsubishi TM25T3A-H IGBT Module

Mitsubishi TM25T3A-H Thyristor Module Data & Features

A Foundation for Reliability: The TM25T3A-H 3-Phase Mixed Bridge Rectifier

The Mitsubishi TM25T3A-H thyristor module delivers foundational reliability for industrial power systems by integrating robust, long-life chip technology with a thermally efficient package. Top Specs: 800V | 60A | Rth(j-c) 0.35°C/W. Key Benefits: Simplified thermal design; Enhanced operational lifetime. By utilizing an insulated base, the module provides a direct, low-resistance thermal path to the heatsink, which streamlines assembly and improves heat dissipation. This design is crucial for engineers focused on creating dependable and easily maintainable power conversion stages.

Core Specifications for System Reliability

Technical parameters are central to any design evaluation. For the TM25T3A-H, certain values are particularly relevant for assessing its role in high-reliability applications. These specifications provide a quantitative basis for thermal and electrical performance analysis.

Download the Datasheet for complete performance curves and specifications.

Strategic Value in High-Uptime Industrial Systems

In modern industrial settings, from automated manufacturing lines to critical infrastructure, component reliability translates directly to operational continuity and a lower total cost of ownership. The design philosophy of the Mitsubishi TM25T3A-H aligns directly with these strategic objectives. Its UL Recognized status (File No. E80271) simplifies the compliance and certification pathway for end-equipment destined for North American markets, potentially reducing project timelines. This pre-certification is a vital asset for OEMs aiming for rapid market entry. Furthermore, the inherent robustness of the module, evidenced by its high surge current tolerance, contributes to system resilience, safeguarding against unexpected line voltage fluctuations that could otherwise lead to costly failures and downtime. For more context on preventing such issues, understanding the principles of failure analysis in power modules can provide valuable insights.

Engineered for Demanding Rectification Applications

The TM25T3A-H is a 3-phase mixed bridge rectifier designed for the front-end of various power conversion systems. Its electrical characteristics and physical construction make it well-suited for a range of industrial uses where converting three-phase AC input into a controlled DC output is required.

• DC Motor Controls: Provides the main rectified power for variable speed DC motor drives, where reliability and controlled power delivery are essential for consistent motor performance.
• NC Equipment Power Supplies: Serves as the robust AC-DC front-end for numerical control (NC) machines, ensuring a stable DC bus voltage for subsequent inverters and servo systems.
• General-Purpose AC-DC Rectification: Applicable in battery chargers, welding power supplies, and uninterruptible power supplies (UPS) that demand a simple, reliable, and cost-effective rectification solution.

With its 800V VDRM and UL-recognized insulated package, the TM25T3A-H is best suited for cost-sensitive AC-DC front ends requiring certified, reliable rectification.

Deployment Example: The Bedrock of a DC Motor Drive

Consider a mid-sized industrial conveyor system powered by a 5kW DC motor. The motor drive's power stage begins with AC rectification. Here, the TM25T3A-H acts as the gateway, converting the incoming 380/400V three-phase AC power into a stable DC bus. During installation, the module's insulated baseplate is mounted directly to the drive's main heatsink without needing fragile and thermally resistive mica pads. This not only speeds up assembly but also ensures a dependable thermal interface from day one. Over years of operation, the glass-passivated thyristor junctions within the module resist degradation, providing consistent performance even as the drive cycles on and off, supporting the conveyor's demanding start-stop duty cycle.

Technical Breakdown: Insulated Construction and Passivation

Two core features define the reliability of the TM25T3A-H: its thermally advantageous package and the protective measures at the chip level. What is the key benefit of the TM25T3A-H's insulated design? It simplifies thermal management and enhances system reliability. The module employs an insulated base, where the internal ceramic substrate provides 2500V of electrical isolation between the power terminals and the mounting plate. This allows engineers to bolt the module directly onto a grounded chassis or heatsink, creating a simple, low-resistance thermal path. Think of thermal resistance as a bottleneck in a pipeline; the low Rth(j-c) value of 0.35°C/W for the thyristor acts like a wide pipe, allowing heat to escape the semiconductor junction efficiently and keeping temperatures down.

At the semiconductor level, the device utilizes glass-passivated thyristor chips. How does glass passivation improve the TM25T3A-H? It ensures stable electrical performance over its operational lifespan. This process involves depositing a thin layer of specialized glass over the sensitive junction termination area, creating a hermetic seal. This seal protects the chip from moisture and ionic contaminants that could otherwise cause leakage currents to increase and voltage blocking capabilities to degrade over time, a critical factor for equipment deployed in non-ideal industrial environments. For systems requiring a different configuration or current handling, the SKKD162/16 provides an alternative topology for evaluation.

Data-Informed Component Evaluation

Evaluating power modules requires a comparison of key datasheet parameters. The purpose of this section is to present objective data to support engineering decisions. While the TM25T3A-H serves a specific niche, other devices may be considered based on different system priorities such as higher voltage or current requirements. As a distributor, we provide the factual specifications to empower your selection process, without offering direct replacement recommendations. For instance, designers working on high-frequency applications might explore the characteristics of IGBT modules, which are designed for fast switching. The data below is presented for technical comparison.

For a broader view of power components, the portfolio from manufacturers like Mitsubishi Electric covers a wide spectrum of power levels and technologies, enabling engineers to find components tailored to their specific application constraints.

Enabling Long-Term Strategic Performance

Selecting a component like the Mitsubishi TM25T3A-H is more than a short-term design choice; it is a strategic investment in the long-term performance and market reputation of the final product. By building upon a foundation of components known for their durability and certified safety, engineering teams can shift their focus from basic operational stability to value-added innovation. The inherent reliability of this thyristor module contributes to a virtuous cycle of reduced field service demands, higher customer satisfaction, and a stronger brand image—critical advantages in a competitive global market where operational excellence is a key differentiator.