The **UCD2A331MCL** is a high-performance surface-mount (SMD) aluminum electrolytic capacitor manufactured by **Nichicon**. It belongs to the **UCD series**, which is specifically designed for low impedance and high reliability in automotive and industrial applications. ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Capacitance** | 330 µF | | **Voltage Rating (DC)** | 100 V | | **Tolerance** | ±20% (at 120Hz, 20°C) | | **Series** | UCD (Low Impedance / Chip Type) | | **Lifetime / Endurance** | 2000 to 5000 Hours at 105°C | | **Operating Temp Range** | -55°C to +105°C | | **Mounting Type** | Surface Mount (SMD) | | **Termination** | Radial Lead (V-Chip Style) | --- ### 2. Physical Dimensions The part follows a standardized "Chip Type" package for automated SMT (Surface Mount Technology) assembly. * **Diameter (D):** 16.00 mm * **Length/Height (L):** 16.50 mm * **Footprint:** Typically 17.0 mm x 17.0 mm (Land pattern varies by PCB design) --- ### 3. Core Features & Advantages * **Low Impedance:** This capacitor is engineered to have low internal resistance, making it highly efficient at filtering high-frequency noise and handling ripple currents without excessive heating. * **Reflow Soldering Compatible:** Designed to withstand the high temperatures required for lead-free reflow soldering processes. * **AEC-Q200 Qualified:** Most parts in the UCD series are compliant with automotive quality standards, ensuring durability against vibration and thermal shock. * **Polarized:** Like all aluminum electrolytic capacitors, it has a specific polarity (Positive and Negative terminals) that must be observed during installation. --- ### 4. Typical Applications Because of its high voltage rating (100V) and low impedance, the UCD2A331MCL is commonly found in: 1. **DC-DC Converters:** Used for input and output smoothing. 2. **Automotive Electronics:** Power steering, lighting systems, and infotainment units. 3. **Industrial Power Supplies:** Filtering ripple in 48V or 72V systems. 4. **Audio Equipment:** Decoupling and power stage stabilization. --- ### 5. Identification (Part Number Breakdown) ```text UCD 2A 331 M CL | | | | |_ Packaging/Case Size Code | | | |____ Tolerance (M = ±20%) | | |________ Capacitance (331 = 33 x 10^1 = 330µF) | |____________ Voltage (2A = 100V) |_________________ Series Name (Nichicon UCD) ```