## Technical Overview of the UPZ2D331MHD The **UPZ2D331MHD** is a high-performance aluminum electrolytic capacitor manufactured by **Nichicon**. It belongs to the **PZ series**, which is specifically designed for high reliability and long life under high-voltage conditions. ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Manufacturer** | Nichicon | | **Series** | PZ (High Reliability / Long Life) | | **Capacitance** | 330 µF | | **Voltage Rating** | 200V DC | | **Tolerance** | ±20% | | **Temperature Range** | -40°C to +105°C | | **Lifetime (Endurance)** | 2000 hours at 105°C | | **Mounting Type** | Through Hole (Radial Lead) | | **Dimensions** | Approx. 18mm (Diameter) x 31.5mm (Length) | --- ### 2. Physical Construction and Features * **Electrolyte:** Uses a liquid electrolyte optimized for high-voltage stability and low leakage current. * **Case Style:** Standard radial leaded aluminum canister with a pressure relief vent on the top to prevent explosion in case of failure. * **Compliance:** RoHS compliant and lead-free. * **Size Efficiency:** Part of the "miniature" series, providing high capacitance in a relatively small physical volume compared to standard industrial capacitors. --- ### 3. Application Use Cases This specific capacitor is commonly found in power conversion circuits where 200V ratings are necessary. Typical applications include: 1. **Switching Power Supplies (SMPS):** Used for smoothing and filtering the output or intermediate DC bus. 2. **LED Drivers:** Provides stable DC power to high-wattage LED arrays. 3. **Ballast Circuits:** Used in electronic ballasts for lighting systems. 4. **Adapters and Chargers:** Found in high-power AC/DC adapters where space is limited but high capacitance is required. --- ### 4. Interpretation of the Part Number The part number **UPZ2D331MHD** can be broken down as follows: * **U:** Standard Nichicon prefix. * **PZ:** The specific series (High Reliability). * **2D:** The voltage code (2D = 200V). * **331:** The capacitance code ($33 \times 10^1 = 330$ µF). * **M:** The tolerance code (M = ±20%). * **HD:** Lead and packaging configuration code.