Based on the part number provided, **302-R201** typically refers to a specific type of **variable resistor** or **trimmer potentiometer**, often used in industrial controls or legacy audio equipment. --- ### Technical Specifications While specific manufacturers (like Bourns or Vishay) may have slight variations, here is the general technical breakdown for a 302-series R201 component: | Feature | Specification | Description | | :--- | :--- | :--- | | **Component Type** | Potentiometer / Rheostat | A variable resistor used to adjust current or voltage. | | **Resistance Value** | 200 Ohms | The "201" code translates to 20 x 10^1 (200 $\Omega$). | | **Power Rating** | 1/2 Watt to 2 Watts | Varies by package size, determining heat dissipation. | | **Tolerance** | ±10% to ±20% | The standard deviation from the nominal 200 Ohm value. | | **Mounting Type** | Through-Hole (THT) | Designed to be soldered into holes on a PCB. | --- ### Understanding the Part Number Code Electronic components often use a three-digit coding system for values: 1. **302**: Usually the series or model number designated by the manufacturer (indicating physical size and material, e.g., Cermet or Carbon). 2. **R**: Indicates "Resistance." 3. **201**: * **20**: The first two significant digits. * **1**: The multiplier (number of zeros). * **Calculation**: $20 \times 10^1 = 200$ Ohms. --- ### Common Applications These parts are generally found in circuits that require "set and forget" calibrations: * **Gain Adjustment:** Setting the volume or amplification levels in audio pre-amps. * **Voltage Division:** Adjusting the output voltage in power supply circuits. * **Sensor Calibration:** Fine-tuning the threshold of a sensor before it is deployed. * **Timing Circuits:** Adjusting the RC constant in oscillator circuits. --- ### Physical Characteristics * **Material:** Usually made of **Cermet** (Ceramic-Metal) for stability. * **Adjustment:** Features a small screw head (slotted or cross) on the top or side to change the resistance value. * **Terminals:** Typically has 3 pins (Input, Output/Wiper, and Ground).