The part number **RTD-50V681MJHT-R5** refers to a high-reliability Aluminum Electrolytic Capacitor, typically manufactured by brands like **United Chemi-Con (UCC)** or similar specialized manufacturers. It is designed for automotive or industrial applications requiring high temperature resistance and vibration proofing. --- ## 1. Technical Specifications | Parameter | Value | Description | | :--- | :--- | :--- | | **Capacitance** | 680 µF | The amount of electrical charge stored. | | **Voltage Rating** | 50V | The maximum continuous DC voltage allowed. | | **Tolerance** | ±20% (M) | Standard industry tolerance for electrolytic caps. | | **Temperature** | -40°C to +125°C | Rated for extreme environments (Automotive Grade). | | **Case Size (DxL)** | 10mm x 16.5mm | Physical dimensions (standard "J" size code). | | **Mounting Type** | SMD (Surface Mount) | Designed for automated PCB assembly. | --- ## 2. Part Number Breakdown (Decoder) To understand the specific features, we can break down the suffix and prefix: * **RTD**: Series name. This series is often characterized by **Low ESR** (Equivalent Series Resistance) and **High Ripple Current** capability. * **50V**: Rated Working Voltage. * **681**: Capacitance code. The first two digits are significant figures, the third is the multiplier ($68 \times 10^1 = 680$). * **M**: Tolerance code ($\pm 20\%$). * **JHT**: Package/Case size code (specifically $10 \times 16.5$ mm). * **R5**: Packaging suffix, usually indicating Tape & Reel specifications for pick-and-place machines. --- ## 3. Key Electronic Characteristics ### ESR and Impedance Because this belongs to a series like RTD, it is optimized for **low impedance** at high frequencies. This is crucial for switching power supplies where high-frequency noise needs to be filtered out. ### Endurance These capacitors are typically rated for **2,000 to 5,000 hours at 125°C**. In electronic terms, for every 10°C decrease in operating temperature, the lifespan roughly doubles. ### Vibration Resistance The "V" in some variations or the SMD structure suggests it is built to withstand mechanical stress. In automotive electronics (like ECUs or LED drivers), this prevents the component from shearing off the PCB during vehicle operation. --- ## 4. Typical Applications 1. **Automotive Electronics:** Engine Control Units (ECUs), ADAS sensors, and infotainment systems. 2. **Power Supplies:** Output filtering for DC-DC converters. 3. **Industrial:** High-density power modules and motor controllers.