## Technical Overview: 47DAC-102-R The **47DAC-102-R** is a high-precision rotary potentiometer (often classified as a control potentiometer) manufactured by **Grayhill**. It is specifically designed for applications requiring high reliability, compact sizing, and precise manual input. --- ### 1. Key Technical Specifications The table below summarizes the primary electrical and mechanical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Component Type** | Rotary Potentiometer / Control Switch | | **Resistance Value** | 1,000 Ohms (1kΩ) | | **Resistance Tolerance** | ±10% (Standard) | | **Number of Gangs** | 1 (Single Deck) | | **Termination Style** | PC Pin (Through-hole mounting) | | **Actuator Type** | Flatted Shaft | | **Rotation Angle** | 300° (Total Mechanical) | | **Power Rating** | Approximately 0.05W to 0.1W | --- ### 2. Detailed Electronic Components The "47DAC-102-R" consists of several internal elements that define its performance: * **Resistive Element:** Utilizes a conductive plastic or carbon film track. The "102" in the part number indicates the resistance: `10` followed by `2` zeros = **1,000 Ohms**. * **Wiper Mechanism:** A multi-finger metal wiper that moves along the resistive track to provide a variable voltage output (voltage divider principle). * **Housing:** Typically constructed from high-grade thermoplastic to ensure electrical insulation and heat resistance during soldering. * **Linearity:** Usually features a **Linear Taper**, meaning the change in resistance is proportional to the degree of rotation. --- ### 3. Part Number Breakdown Understanding the nomenclature helps in identifying specific features: * **47:** The Series designation (Grayhill Series 47). * **D:** Designates the specific physical configuration or mounting style. * **AC:** Refers to the shaft style and bushing length. * **102:** The resistance code ($10 \times 10^2 = 1000 \Omega$). * **R:** Indicates RoHS compliance (Lead-free). --- ### 4. Common Applications Due to its robust design and small footprint, this part is frequently found in: 1. **Industrial Controls:** Setting parameters on PLCs or control panels. 2. **Medical Equipment:** Adjusting sensitivity or output levels on diagnostic devices. 3. **Audio/Visual:** Fine-tuning gain or signal levels in professional audio gear. 4. **Test & Measurement:** Calibration offsets in handheld multimeters or oscilloscopes.