IR 36MT120 Three-Phase Bridge | Robust Front-End Power Rectification
The IR **36MT120** is a high-performance, three-phase bridge rectifier module engineered for resilience and efficiency in demanding industrial power conversion systems. Housed in a rugged, isolated MTP package, this component provides a simplified yet powerful solution for converting AC mains voltage into a stable DC bus, serving as the foundational front-end for motor drives, high-power SMPS, and UPS applications. The **36MT120** is not just a component; it's a building block for system reliability.
Technical Deep Dive: Engineered for Industrial Reality
- Superior Voltage Headroom (1200V VRRM): Industrial power lines are notoriously unstable, subject to transients and overvoltage events. The **36MT120**'s 1200V reverse voltage rating provides a critical safety margin, ensuring the rectifier stage can withstand unexpected line surges without failure. This robustness is essential for equipment deployed in harsh factory environments, directly contributing to longer service life and reduced downtime.
- High Thermal Efficiency and Isolation: The module utilizes a high-efficiency package with an isolated baseplate. This design offers two distinct advantages. First, it enables direct mounting to a common heatsink without the need for additional, often fragile, insulating pads, streamlining assembly and reducing potential points of failure. Second, it ensures excellent thermal conductivity, efficiently transferring heat away from the diodes. This superior IGBT thermal management is key to maintaining performance under heavy loads and achieving higher power density in your design.
Multidimensional Application Scenarios & Value
The true value of the **36MT120** is realized in its ability to solve specific challenges across various high-power applications:
- AC Motor Drive Front-Ends: In variable frequency drives (VFDs), this module creates a stable and reliable DC bus for the subsequent three-phase IGBT inverter stage. Its high surge current capability (IFSM) effortlessly handles the inrush current during power-up, protecting downstream components and ensuring a smooth start-up sequence.
- Uninterruptible Power Supplies (UPS): For online UPS systems, reliability is non-negotiable. The **36MT120** provides the dependable AC-to-DC conversion for both battery charging and supplying the inverter. Its robust construction ensures the critical power path remains intact, a key factor in systems protecting data centers and medical equipment.
- Industrial Power Supplies & Welders: In applications like switch-mode power supplies (SMPS) and welding equipment, the rectifier must endure continuous heavy loads and high-temperature operation. The efficient thermal design of this module prevents overheating, ensuring consistent output power and operational stability, even in punishing duty cycles.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Repetitive Peak Reverse Voltage (VRRM) | 1200 V |
| Average Forward Current (IF(AV)) @ TC=55°C | 35 A |
| Surge Forward Current (IFSM) @ 50Hz | 475 A |
| Forward Voltage Drop (VF) @ 30A, 25°C | 1.25 V |
| Operating Junction Temperature (TJ) | -40°C to 150°C |
| Package | MTP (Isolated) |
| Datasheet | 36MT120 Datasheet |
Selection Guidance: Integrated Module vs. Discrete Diodes
Designers often weigh the choice between an integrated module like the **IR 36MT120** and a solution built from six individual diodes. While discrete components offer some layout flexibility, the module approach presents compelling advantages for industrial systems:
- Reduced Assembly Complexity: A single module drastically cuts down on component count, soldering points, and assembly time, directly lowering manufacturing costs.
- Guaranteed Performance: The module ensures matched thermal and electrical characteristics between diodes, eliminating the performance variability seen in discrete solutions.
- Compact Footprint: The integrated package offers higher power density, saving valuable PCB real estate in space-constrained designs.
For most industrial industrial power electronics applications requiring 35A or less, the **36MT120** delivers a more reliable, compact, and cost-effective front-end rectifier solution.
Frequently Asked Questions (FAQ)
- What are the main benefits of the isolated MTP package?The primary benefits are simplified assembly and enhanced safety. You can mount multiple modules on a single, non-isolated heatsink without worrying about electrical shorts, which reduces hardware complexity and improves the overall thermal design of your system.
- Is this module suitable for applications with high inrush current?Absolutely. With a surge forward current rating (IFSM) of 475A, the 36MT120 is specifically designed to handle the large inrush currents typical of charging large DC-link capacitors in motor drives and high-power supplies.
By providing a robust, thermally efficient, and easy-to-integrate solution, this module is an excellent choice for your next power conversion project. To explore a wider range of power components, browse our complete collection of IGBT Modules and power solutions. For volume pricing or specific application inquiries, please contact us for a quote.
