The **FPA-1B-R** is a specific electronic component primarily recognized as a **high-precision, flameproof metal film resistor**. These are designed for circuits requiring high stability and safety measures against overheating. Below is a detailed breakdown of its electronic characteristics and technical specifications. --- ### 1. Key Technical Specifications The "FPA" series generally follows standard industrial parameters for power-rated resistors. | Parameter | Specification | | :--- | :--- | | **Resistor Type** | Metal Film / Power Film | | **Power Rating** | Typically 1 Watt (varies by package size) | | **Resistance Tolerance** | ±1%, ±2%, or ±5% | | **Coating Material** | Flameproof Silicone/Ceramic Coating | | **Mounting Type** | Through-hole (Axial leads) | | **Temperature Coefficient** | ±50ppm/°C to ±200ppm/°C | --- ### 2. Physical and Material Construction The FPA-1B-R is built to withstand environmental stress while maintaining electrical integrity: * **Core:** High-grade ceramic rod. * **Film:** A thin metal or metal-oxide film is deposited on the rod to provide the resistance value. * **Terminals:** Tinned copper leads for high conductivity and ease of soldering. * **Protection:** The **"R"** suffix often denotes **RoHS Compliance** (Restriction of Hazardous Substances), meaning it is lead-free. * **Safety Feature:** The "Flameproof" coating ensures that if the resistor fails due to a massive overload, it will not catch fire or emit flames; instead, it will open the circuit cleanly. --- ### 3. Part Number Breakdown (Typical) While manufacturers vary slightly, the nomenclature usually follows this logic: 1. **FPA:** Series name (Flameproof Power Axial). 2. **1B:** Power rating and body size (e.g., 1 Watt, "B" size frame). 3. **R:** RoHS Compliant / Taped and Reeled packaging. --- ### 4. Common Applications Because of its flameproof nature and precision, this part is frequently found in: * **Power Supplies:** Used as a bleeder or current-limiting resistor. * **Consumer Electronics:** TV sets and monitors where safety certifications are strict. * **Industrial Control:** Circuits that may experience temporary voltage surges. * **Automotive:** Signal processing units where heat dissipation is critical. --- ### 5. Standard Identification Table | Feature | Advantage | | :--- | :--- | | **Low Noise** | Metal film construction results in lower thermal noise compared to carbon. | | **Safety** | Will not ignite under overload conditions. | | **Durability** | High moisture resistance due to the specialized outer coating. |