The **VBO20-12NO2** is a high-performance single-phase bridge rectifier manufactured by IXYS (now a part of Littelfuse). It is designed to convert alternating current (AC) into direct current (DC) in industrial applications. --- ### ## Technical Specifications The part number provides specific details about its ratings and characteristics: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Circuit Type** | Single Phase Bridge | Full-wave rectification | | **$V_{RRM}$** | 1200 V | Maximum repetitive reverse voltage | | **$I_{dAV}$** | 20 A | Average forward current (at $T_C = 110^\circ C$) | | **$I_{FSM}$** | 300 A | Surge current (10ms, half-sine wave) | | **$V_F$** | ~1.1 V | Forward voltage drop per diode | | **Package** | PWS-A | Standard screw-terminal / solder-pin housing | --- ### ### Key Features * **Planar Passivated Chips:** Ensures low leakage current and high reliability over the component's lifetime. * **Isolation:** The internal chips are electrically isolated from the metal base plate (typically rated up to 2500V~), allowing multiple modules to be mounted on the same heatsink. * **Robustness:** High surge current capability ($I_{FSM}$) allows the device to handle temporary overloads without failure. * **Easy Mounting:** Features a single-screw mounting hole and terminal pins suitable for soldering or wave soldering. --- ### ### Pinout and Internal Diagram The device contains four diodes connected in a bridge configuration: ```text AC Input (~) ---->|----+---- (+) DC Output | | AC Input (~) ---->|----+---- (-) DC Output ``` * **Terminals 1 & 2:** AC Input (Phase and Neutral). * **Terminal 3:** Positive (+) DC Output. * **Terminal 4:** Negative (-) DC Output. --- ### ### Typical Applications The VBO20-12NO2 is commonly found in the following systems: 1. **Switch Mode Power Supplies (SMPS):** Input rectification stage. 2. **DC Motor Drives:** Converting mains AC to variable DC. 3. **Battery Chargers:** Providing steady DC current for high-capacity batteries. 4. **Input Rectifiers for Inverters:** Used in variable frequency drives (VFDs).