The **VS-131MT...C** series is a line of high-power Three-Phase Bridge Power Modules manufactured by Vishay (formerly International Rectifier). These modules are designed to convert AC input into DC output for industrial applications. --- ## 1. Key Technical Specifications The "131MT" nomenclature typically indicates the current rating and the physical package type. | Feature | Description | | :--- | :--- | | **Circuit Configuration** | Three-Phase Bridge (6 Rectifier Diodes) | | **Max Output Current ($I_{O}$)** | ~130A to 160A (depending on case temperature) | | **Voltage Rating ($V_{RRM}$)** | 800V, 1000V, 1200V, 1400V, or 1600V | | **Package Type** | MTP (Micro-Tri-Pack) | | **Operating Temp Range** | -40°C to +150°C | --- ## 2. Internal Electronic Structure The module contains six high-performance silicon rectifier diodes connected in a bridge configuration. ### Circuit Diagram Representation 1. **Input:** Three AC terminals (L1, L2, L3). 2. **Output:** Two DC terminals (Positive + and Negative -). 3. **Isolation:** The internal chips are electrically isolated from the metal baseplate, allowing multiple modules to be mounted on the same heatsink without short-circuiting. --- ## 3. Physical Features & Construction * **Encapsulation:** The internal components are potted in a high-thermal-conductivity epoxy resin. * **Terminals:** Usually features screw-type terminals or heavy-duty solder pins for high current handling. * **Baseplate:** Copper baseplate for optimized heat dissipation. * **Compliance:** RoHS compliant and UL E78996 recognized (safety standard). --- ## 4. Typical Applications These modules are widely used in power conversion systems where high reliability is required: * **Variable Speed Drives (VFDs):** As the front-end rectifier for motor controllers. * **Battery Chargers:** Industrial-grade chargers for large lead-acid or lithium banks. * **Welding Equipment:** Converting AC power to DC for arc welding. * **Power Supplies:** High-current DC power units for electroplating or electrolysis. --- ## 5. Selection Guide (Part Numbering) The suffix indicates the peak reverse voltage ($V_{RRM}$): * **VS-131MT80C:** 800V * **VS-131MT120C:** 1200V * **VS-131MT160C:** 1600V