The **M500320T2DK-R** is a specific surface-mount electronic component, typically categorized as a **thick film chip resistor** or a specialized **MELF (Metal Electrode Leadless Face)** resistor, depending on the manufacturer's series (often associated with precision brands like KOA Speer or Viking). Below is a detailed breakdown of its electronic characteristics and technical specifications. --- ### 1. Technical Specifications | Parameter | Specification (Typical) | | :--- | :--- | | **Component Type** | Fixed Resistor / Precision Chip | | **Resistance Value** | 320 kΩ (based on "3203" or "320" coding) | | **Tolerance** | ±0.5% or ±1% (Standard for "D" or "F" codes) | | **Power Rating** | 0.25W (1/4 Watt) to 0.5W | | **Package / Case** | 1206 (3216 Metric) or MELF | | **Temperature Coefficient** | ±50 ppm/°C or ±100 ppm/°C | | **Mounting Type** | Surface Mount (SMD/SMT) | --- ### 2. Part Number Breakdown (Anatomy) The part number follows a standard industry nomenclature which helps in identifying its physical and electrical properties: * **M50 / M**: Often designates the series (e.g., High pulse, High voltage, or Precision MELF). * **0320**: Represents the resistance value. In many coding systems, this signifies **320 kOhms**. * **T**: Usually refers to the **Temperature Coefficient of Resistance (TCR)** or a specific tolerance grade. * **2**: Can indicate the power rating (e.g., 2 = 1/2 Watt) or a specific size variant. * **DK**: Often denotes the tolerance (D = 0.5%) and the packaging style. * **-R**: Indicates that the part is supplied on a **Tape and Reel** for automated assembly and is **RoHS compliant**. --- ### 3. Key Electronic Features 1. **High Stability:** These parts are designed to maintain a consistent resistance value even under fluctuating thermal conditions. 2. **Pulse Handling:** If this is a MELF-style resistor, it offers superior pulse-load capability compared to standard flat-chip resistors due to its cylindrical construction. 3. **Low Noise:** The thin/thick film technology used reduces thermal noise, making it suitable for precision analog circuits. 4. **Environmental Protection:** Typically coated with a multi-layer epoxy or glass overcoat to protect against moisture and sulfur. --- ### 4. Common Applications * **Industrial Controls:** Used in PLC (Programmable Logic Controller) inputs for signal conditioning. * **Automotive Electronics:** Engine control units (ECUs) and battery management systems. * **Measurement Equipment:** Multimeters and sensors where accuracy is critical. * **Power Supplies:** Feedback loops where voltage stability is required. --- ### 5. Footprint Code (1206) If the part follows the standard 1206 footprint, the dimensions are: ```text Length: 3.2 mm (0.126 in) Width: 1.6 mm (0.063 in) Height: 0.5 - 0.6 mm ``` ---