The **VS-11.MT...K** series (often identified by manufacturers like Vishay/IR) refers to a line of **Three-Phase Bridge Power Modules**. These components are designed to rectify alternating current (AC) into direct current (DC) in industrial applications. --- ### 1. General Specifications These modules are known for their robust design and high thermal efficiency. | Feature | Specification | | :--- | :--- | | **Circuit Type** | Three-Phase Bridge (6 Diodes) | | **Current Rating ($I_O$)** | 110 A to 160 A (depending on specific model) | | **Voltage Range ($V_{RRM}$)** | 800 V to 1600 V | | **Package Style** | MTK (Int-A-Pak style) | | **Mounting** | Screw terminals with isolated base | ### 2. Internal Circuit Diagram The module contains six power diodes arranged in a bridge configuration to handle the three phases (L1, L2, L3) of an AC input. ```mermaid graph LR subgraph VS-11.MT AC1((L1)) --> D1[Diode] AC1 --> D2[Diode] AC2((L2)) --> D3[Diode] AC2 --> D4[Diode] AC3((L3)) --> D5[Diode] AC3 --> D6[Diode] end D1 & D3 & D5 --> POS(+) D2 & D4 & D6 --> NEG(-) ``` ### 3. Key Electronic Characteristics * **High Thermal Conductivity:** The internal components are mounted on an aluminum oxide ceramic isolated base, which provides excellent heat transfer while ensuring the case is electrically neutral. * **Low Forward Voltage Drop ($V_F$):** Designed to minimize power loss during conduction. * **High Surge Current ($I_{FSM}$):** Capable of handling high momentary current spikes (typically up to 1500A for 10ms). * **Encapsulation:** The module is filled with a specialized epoxy resin that protects against moisture and mechanical vibration. ### 4. Part Number Breakdown (Nomenclature) Typical examples include **VS-110MT120KPBF**: * **VS-**: Vishay Semiconductor branding. * **110**: Average Output Current (110 Amps). * **MT**: Three-phase bridge configuration in MTK package. * **120**: Voltage rating (120 x 10 = 1200 Volts). * **K**: Specific terminal/mechanical style. * **PBF**: Lead (Pb)-free / RoHS compliant. --- ### 5. Common Applications 1. **Battery Chargers:** High-power industrial charging stations. 2. **Welding Equipment:** Direct current (DC) supply for arc welders. 3. **Variable Speed Drives (VFDs):** Acting as the input rectifier stage for motor controllers. 4. **Power Supplies:** Uninterruptible Power Supplies (UPS) and DC power plants.