The part number **HTK-25V331MH10E-R2** refers to a high-performance **Aluminum Electrolytic Capacitor**. Below is a detailed breakdown of its technical specifications and characteristics. ### 1. Technical Specifications | Parameter | Value | Description | | :--- | :--- | :--- | | **Capacitance** | 330 µF | The amount of charge the capacitor can store. | | **Voltage Rating** | 25V | The maximum DC voltage it can handle continuously. | | **Series** | HTK | Represents high temperature, high reliability, and low ESR. | | **Tolerance** | ±20% (M) | Standard industry tolerance for electrolytic capacitors. | | **Temperature Range** | -55°C to +125°C | Designed for extreme environments (Automotive grade). | | **Lifetime** | Up to 5,000 hours | Rated life at its maximum operating temperature. | | **Mounting Type** | Surface Mount (SMD) | Designed for automated PCB assembly. | --- ### 2. Part Number Decoder Analyzing the alphanumeric string helps identify the component's physical and electrical build: * **HTK**: Series identifier (usually denotes High Temperature/Low Impedance). * **25V**: Rated Voltage (25 Volts). * **331**: Capacitance code. The first two digits (33) are the value, and the third (1) is the multiplier ($10^1$). $33 \times 10 = 330$ µF. * **M**: Tolerance code (±20%). * **H10**: Case size code (Diameter x Length). Typically corresponds to an 8mm or 10mm diameter chip. * **E-R2**: Packaging/Taping suffix (Tape and Reel for automated pick-and-place). --- ### 3. Key Features & Applications #### Features * **Low ESR (Equivalent Series Resistance):** Minimizes heat generation and allows for high ripple current handling. * **AEC-Q200 Qualified:** These parts are often compliant with automotive stress-test standards, making them vibration-resistant. * **Reflow Soldering Compatible:** Built to withstand the high temperatures of lead-free soldering processes. #### Common Applications * **Automotive Electronics:** Power steering units, engine control units (ECU), and LED lighting drivers. * **Industrial Power Supplies:** Smoothing and filtering in DC-DC converters. * **Telecommunications:** Base station power modules where high temperature stability is required. --- ### 4. Circuit Symbol and Footprint In electronic design software (like Altium or KiCad), the part is represented as follows: ```cpp // Schematic Symbol: Polarized Capacitor // (+) Terminal marked on the component (usually a dark band) // (-) Terminal indicates the negative lead [ + ]----|(----[ - ] ```