The **C-73-R** is primarily identified as a high-performance **Carbon Composition Resistor** or a specific **Thermal Fuse/Cutoff** component, depending on the manufacturer (commonly associated with NTE Electronics or specific industrial heating elements). Below is a breakdown of the electronic specifications and characteristics typically associated with this part number. --- ## 1. Component Overview The C-73-R is most frequently categorized as a **fixed resistor** designed for specific power dissipation and tolerance levels. ### Key Specifications | Parameter | Typical Value | | :--- | :--- | | **Resistance** | 73 Ohms (Standard) | | **Tolerance** | ±5% (indicated by 'R' or Gold band) | | **Power Rating** | 1/2 Watt to 2 Watts (varies by series) | | **Material** | Carbon Composition or Metal Film | | **Package Type** | Axial Leaded | --- ## 2. Technical Characteristics ### A. Composition * **Carbon Composition:** These parts are made of a solid resistive element. They are highly reliable for high-energy pulse applications because the entire body of the resistor conducts energy, preventing "hot spots." * **Inductance:** These parts generally have low inductance, making them suitable for high-frequency RF applications. ### B. Thermal Properties * **Operating Temperature:** Typically rated from -55°C to +155°C. * **Voltage Coefficient:** They exhibit a change in resistance based on applied voltage, which must be accounted for in precision circuits. --- ## 3. Common Applications The C-73-R series is often found in the following environments: 1. **Power Supplies:** Used as a bleeder resistor or for current limiting. 2. **Audio Equipment:** Found in vintage amplifiers and radio receivers due to their pulse-handling capabilities. 3. **Circuit Protection:** In some configurations, the C-73-R suffix refers to a thermal cutoff used to break a circuit if a specific temperature threshold is reached (common in small appliances). --- ## 4. Identification Table (Color Codes) If the component is a standard 4-band resistor, the colors for a 73-ohm resistor would be: | Band | Color | Value | | :--- | :--- | :--- | | **1st Digit** | Violet | 7 | | **2nd Digit** | Orange | 3 | | **Multiplier** | Black | x1 | | **Tolerance** | Gold | ±5% | ---