The **WIW3362-R-104** is a specific model of a **trimmer potentiometer** (often called a "trimpot"). These are precision variable resistors used for tuning, calibration, and adjustment within electronic circuits. Below is a breakdown of its specifications, mechanical design, and electronic characteristics. --- ### 1. Part Number Breakdown The nomenclature for this part typically follows this standard structure: | Component Part | Meaning | Description | | :--- | :--- | :--- | | **WIW3362** | Series Model | 6mm Square, Single-Turn Cermet Trimmer. | | **R** | Adjustment Type | Top-adjust (Rotary) style. | | **104** | Resistance Code | **10** followed by **4** zeros = 100,000 $\Omega$ (**100kΩ**). | --- ### 2. Technical Specifications These are the typical electronic limits and physical properties for the 3362 series: | Parameter | Specification | | :--- | :--- | | **Standard Resistance** | 100 kΩ | | **Resistance Tolerance** | ±10% (standard) | | **Power Rating** | 0.5W at 70°C | | **Max Operating Voltage** | 300V | | **Temperature Range** | -55°C to +125°C | | **Effective Travel** | 240° Nominal (Single Turn) | | **Element Material** | Cermet (Ceramic/Metal composite) | --- ### 3. Pin Configuration and Internal Logic The device has three pins, usually arranged in a triangular or offset pattern to fit standard PCBs. * **Pin 1 & 3:** The fixed ends of the resistive element. The total resistance between these two pins is always 100kΩ. * **Pin 2 (Wiper):** The moving contact. As you turn the screw/knob, the resistance between Pin 1-2 and Pin 2-3 changes. #### Common Wiring Modes: 1. **Voltage Divider:** Connected to VCC (Pin 1), Ground (Pin 3), and Output (Pin 2). Used to provide a variable reference voltage. 2. **Rheostat (Variable Resistor):** Pin 2 is tied to either Pin 1 or Pin 3. This is used to limit current in a branch of a circuit. --- ### 4. Typical Applications The WIW3362-R-104 is commonly found in: * **LCD Contrast Adjustment:** Tuning the visibility of character displays. * **Sensor Calibration:** Setting the threshold for a light or temperature sensor. * **Gain Control:** Adjusting the amplification level in an Op-Amp circuit. * **Timing Adjustments:** Fine-tuning the frequency of a 555 timer circuit. ---