The part number **HTK-25V331MH10EXN-R2** refers to a high-performance **Surface Mount (SMT) Aluminum Electrolytic Capacitor**, typically manufactured by companies like **Man Yue (Samxon)** or similar specialized passive component manufacturers. Below is a detailed breakdown of the electronic specifications and features associated with this specific component. --- ## 1. Technical Specifications | Parameter | Specification | Details | | :--- | :--- | :--- | | **Capacitance** | 330 µF | The energy storage capacity. | | **Voltage Rating** | 25V DC | Maximum continuous operating voltage. | | **Series** | HTK | High temperature, low impedance, long life series. | | **Tolerance** | ±20% (M) | Standard industry tolerance for electrolytic capacitors. | | **Case Size** | 8.0 x 10.0 mm | Diameter (D) x Height (L). | | **Mounting Type** | SMD / SMT | Designed for surface mount pick-and-place. | | **Temperature Range** | -55°C to +105°C | Rated for standard industrial heat profiles. | --- ## 2. Part Number Breakdown To understand what each segment of the code means, we can decode it as follows: - **HTK**: The Series name (typically denotes high reliability or low ESR). - **25V**: The rated Voltage (25 Volts). - **331**: The Capacitance code. The first two digits (33) are significant figures, and the third (1) is the multiplier ($10^1$). Result: $330 \mu F$. - **M**: The Tolerance code ($M = \pm 20\%$). - **H10**: Refers to the physical dimensions (H=8mm diameter, 10=10mm height). - **EXN**: Packaging/Special code (often indicates lead-free/RoHS compliance or specific internal construction). - **R2**: Taping and Reel specification (standard for automated assembly). --- ## 3. Key Features and Applications ### Features * **Low Impedance:** Designed to minimize power loss and heat generation during high-frequency switching. * **Reflow Soldering Compatible:** Built to withstand the high temperatures of infrared or convection reflow ovens. * **Space Efficient:** The SMD vertical chip design (V-Chip) saves PCB real estate compared to radial leaded versions. ### Common Applications * **DC-DC Converters:** Used for input/output filtering to smooth voltage ripples. * **Consumer Electronics:** Found in LED TV mainboards, power adapters, and audio equipment. * **Industrial Automation:** Used in PLCs and sensor interfaces where 24V rails are common (25V rating provides a slim safety margin). * **Telecommunications:** Used in base stations and networking hardware. --- ## 4. Design Considerations When using this part in a circuit, keep the following in mind: 1. **Polarity:** As an electrolytic capacitor, this is a polarized component. Reversing the voltage can cause catastrophic failure. 2. **Voltage Derating:** For high reliability, it is recommended to operate this 25V capacitor at no more than 80% of its rated voltage (approx. 20V). 3. **ESR/Ripple Current:** Ensure the ripple current of your application does not exceed the rated limits of the HTK series to prevent overheating.