The **63XQ-R** is a specific model of a **Trimming Potentiometer** (also known as a "Trimpot"). It is manufactured by various companies, most notably **Suntan** and **Bourns** (as part of their 3386 or 3362 series equivalents). Below is a detailed breakdown of its electronic characteristics and specifications. --- ### 1. General Overview The 63XQ-R is a **single-turn**, through-hole mounted variable resistor. It is used for fine-tuning circuit parameters like voltage levels or gain after the PCB has been assembled. ### 2. Technical Specifications | Parameter | Specification | | :--- | :--- | | **Adjustment Type** | Top Adjust | | **Number of Turns** | 1 (Single Turn) | | **Resistive Material** | Cermet (Ceramic/Metal composite) | | **Resistance Range** | 10 $\Omega$ to 2 M$\Omega$ (Standard) | | **Power Rating** | 0.5W at 70°C | | **Tolerance** | ±10% | | **Temperature Coefficient** | ±100ppm/°C | | **Mounting Type** | Through-hole (PC Pin) | --- ### 3. Pinout and Physical Design The "XQ" suffix typically refers to the **terminal configuration**. * **Terminals:** It has three pins (Input, Wiper, Output). * **Square Body:** The unit is roughly 6.3mm to 9mm square (hence the "63" prefix in many naming conventions). * **Wiper Position:** The "Q" orientation usually signifies a specific triangular or inline pin layout designed to fit standard 2.54mm (0.1") grid spacing. --- ### 4. Key Components and Materials 1. **Cermet Element:** The resistive track is made of Cermet, which offers better stability and lower temperature coefficient than carbon-based potentiometers. 2. **Rotor:** A plastic or metal slotted head used for screwdriver adjustment. 3. **Housing:** Usually a blue or grey flame-retardant plastic case (UL 94V-0 rated). 4. **Wiper:** A multi-finger metal contact that moves along the resistive element to change the resistance value. --- ### 5. Common Applications * **Calibration:** Adjusting the offset of an Operational Amplifier. * **Power Supplies:** Setting the output voltage limit. * **Sensors:** Fine-tuning the sensitivity threshold of a light or sound sensor. * **Audio Equipment:** Volume or gain trimming inside the chassis. ---