The **FCR-14W-R** is a specific electronic component typically identified as a **Wirewound Resistor** (specifically an axial-leaded, flame-proof type). These components are designed to handle power applications while maintaining high stability and safety in the event of an overload. --- ### 1. General Specifications Based on standard industry nomenclature for the FCR series (Flame-proof Carbon/Wirewound Resistor), here are the typical technical characteristics: | Property | Typical Value | | :--- | :--- | | **Type** | Fixed Resistor (Wirewound) | | **Power Rating** | 1/4 Watt (0.25W) | | **Tolerance** | Usually ±5% (J) | | **Mounting Type** | Through-hole (Axial Leaded) | | **Safety Feature** | Flame-proof Coating (FCR series) | ### 2. Physical Construction The "FCR" designation indicates specific materials used in construction to prevent fire hazards: * **Core:** High-grade ceramic rod. * **Element:** A resistive wire (usually Nickel-Chrome alloy) is wound around the core. * **Coating:** Encapsulated in a non-flammable silicone or epoxy resin. In the event of an electrical failure, the resistor is designed to "open" without catching fire or emitting flames. * **Leads:** Tin-plated copper leads for easy soldering. ### 3. Decoding the Part Number (Standard Format) If we break down the alphanumeric code: | Segment | Meaning | | :--- | :--- | | **FCR** | **F**lame-proof **C**oating **R**esistor. | | **14** | Refers to the power rating (1/4 Watt). | | **W** | Often denotes **W**irewound construction (high surge capability). | | **R** | Usually indicates **R**eel packaging (Taped and Reeled) for automated assembly. | ### 4. Key Advantages 1. **Surge Handling:** Wirewound resistors are superior at handling short-term high-voltage surges compared to metal film resistors. 2. **Safety:** The flame-proof coating ensures that the component does not become an ignition source if the circuit fails. 3. **Low Noise:** Wirewound resistors typically have very low current noise. --- ### 5. Common Applications * **Power Supplies:** Used as a fuse-resistor or limit-resistor. * **Consumer Electronics:** TV, Audio equipment, and household appliances where safety certifications are required. * **Industrial Control:** Circuits where thermal stability and high reliability are critical.