The **2H400** typically refers to a high-power, dual-channel silicon rectifier diode module or a specific series of power bridge rectifiers. These components are designed for heavy-duty industrial applications where high current rectification is required. --- ### 1. Technical Specifications While exact specifications can vary slightly by manufacturer (such as Vicor, Powerex, or Fuji), the "2H400" nomenclature generally follows this profile: | Parameter | Typical Value | Description | | :--- | :--- | :--- | | **Current Rating ($I_F$)** | 400 Amperes | The maximum continuous forward current. | | **Voltage Rating ($V_{RRM}$)** | 200V - 1200V | Maximum repetitive peak reverse voltage. | | **Configuration** | Dual / Half-Bridge | Usually contains two diode chips in series or parallel. | | **Mounting** | Chassis Mount | Designed for bolt-on installation to a heatsink. | | **Isolation Voltage** | 2500V AC | Electrical isolation between the baseplate and terminals. | --- ### 2. Internal Construction The 2H400 module is an "encapsulated" part, meaning the electronic silicon wafers are protected by a rugged housing. * **Silicon Chips:** High-grade silicon junctions optimized for low forward voltage drop to minimize heat. * **Baseplate:** Usually made of copper with nickel plating to ensure high thermal conductivity to the heatsink. * **Terminals:** Heavy-duty screw terminals (M5 or M6) to handle the high-ampere load without melting. --- ### 3. Common Applications Due to its high current capacity, the 2H400 is found in the following electronic systems: 1. **Industrial Power Supplies:** Converting AC grid power to DC for factory equipment. 2. **Welding Inverters:** Acting as the output rectifier to provide the high-current DC arc. 3. **Battery Charging Systems:** Used in large-scale forklift or submarine battery chargers. 4. **Motor Drives:** Part of the front-end rectification stage for Variable Frequency Drives (VFDs). --- ### 4. Implementation Example In a standard bridge configuration, you would use multiple 2H400 modules. Here is a conceptual representation of how they are wired in a power circuit: ```text AC Input (L1) ----> [ Terminal 1 | 2H400 Module | Terminal 2 ] ----> DC Positive (+) | [ Baseplate ] ----> Heatsink/Ground ``` ---