### MA11FBD-R Electronic Component Overview The **MA11FBD-R** is a high-precision, high-voltage surface-mount thick film chip resistor, typically manufactured by **KOA Speer Electronics**. It is designed for applications where stability and high working voltages are required within a small footprint. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Resistor Type** | Thick Film Chip Resistor | | **Series** | MA (High Voltage / Precision) | | **Case Size** | 0805 (Metric 2012) | | **Resistance Tolerance** | ±1.0% (F) | | **Power Rating** | 0.25W (1/4 Watt) | | **Maximum Working Voltage** | Up to 400V - 500V (depending on specific sub-series) | | **Packaging** | Taped & Reeled (R) | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying the exact characteristics: * **MA**: The series designation (High-Voltage Flat Chip). * **11**: Refers to the physical size code (typically corresponds to the 0805 EIA size). * **F**: The **Tolerance** code, representing **±1.0%**. * **BD**: The **Temperature Coefficient of Resistance (TCR)**, usually indicating ±25ppm/°C or ±50ppm/°C (high stability). * **-R**: Indicates the packaging method, **Taped and Reeled**. --- ### 3. Core Features 1. **High Voltage Capability**: Unlike standard thick film resistors that may fail at 150V, the MA series is engineered to handle significantly higher operating voltages, making it ideal for power supplies. 2. **Precision Stability**: With a 1% tolerance and a low TCR, it ensures the resistance value does not drift significantly due to heat or environmental changes. 3. **Surface Mount Design (SMD)**: Designed for automated pick-and-place assembly on Printed Circuit Boards (PCBs). 4. **AEC-Q200 Compliance**: Many variants in this series are qualified for automotive use, ensuring high reliability under stress. --- ### 4. Common Applications * **Power Supply Units (PSU)**: Voltage sensing and feedback loops. * **Industrial Inverters**: Monitoring high-voltage rails. * **Automotive Electronics**: Battery management systems (BMS) and EV charging circuits. * **Medical Equipment**: High-voltage diagnostic tools where precision is critical. --- ### 5. Handling and Soldering The part is compatible with standard lead-free reflow soldering processes. Due to its thick film construction, it is robust against mechanical stress, though care should be taken to avoid thermal shock during manual soldering.