The part number **RTD-50V681MJHTQ-R5** refers to a high-performance **Aluminum Electrolytic Capacitor**. These components are specifically designed for high-temperature stability and low impedance, making them common in automotive and industrial power supplies. --- ### 1. Technical Specifications Table | Parameter | Specification | Description | | :--- | :--- | :--- | | **Capacitance** | 680 µF | The amount of charge the capacitor can store. | | **Voltage Rating** | 50V | Maximum DC voltage the part can handle safely. | | **Tolerance** | ±20% (M) | Variance allowed from the nominal capacitance. | | **Temperature Range** | -55°C to +125°C | Designed for extreme heat environments. | | **Endurance** | 2000 to 5000 hours | Service life at maximum rated temperature. | | **Mounting Type** | SMD (Surface Mount) | Vertical Chip type (V-Chip). | | **Case Size** | Size Code J (approx. 10x10.2mm) | Physical dimensions for PCB footprint. | --- ### 2. Part Number Breakdown The nomenclature usually follows the standards set by manufacturers like **United Chemi-Con (UCC)** or similar high-reliability brands: * **RTD**: Series name (Typically indicates high temperature/low ESR/Automotive grade). * **50V**: Rated Voltage (50 Volts). * **681**: Capacitance code (68 followed by 1 zero = 680µF). * **M**: Tolerance code (±20%). * **J**: Case size code (Diameter/Length). * **H**: Lead/Terminal configuration (Standard or Vibration-resistant). * **T**: Packaging (Taping/Reel). * **Q-R5**: Internal manufacturing codes or AEC-Q200 compliance markers. --- ### 3. Key Electronic Characteristics #### A. Low ESR (Equivalent Series Resistance) This capacitor is engineered to have very low internal resistance. This allows it to handle higher **Ripple Currents** without overheating, which is critical for voltage smoothing in DC-DC converters. #### B. AEC-Q200 Compliance Based on the "RTD" series prefix, this part is often **Automotive Grade**. This means it has undergone rigorous testing for: * Mechanical shock and vibration. * Thermal cycling. * Moisture resistance. #### C. Surface Mount Design (SMD) Unlike traditional radial capacitors with long legs, this is a "V-Chip" style. It is designed for automated pick-and-place assembly and reflow soldering. --- ### 4. Typical Applications * **Automotive ECU:** Power management for Engine Control Units. * **LED Lighting Drivers:** Smoothing output current in high-heat environments. * **Industrial Power Supplies:** Used in bulk filtering for 24V or 36V rails.