The **PVC6147** is a precision trimming potentiometer (trimpot) manufactured by **Bourns**. It belongs to the PVC6 series of 6mm square, single-turn, through-hole cermet trimmers. Below is a detailed breakdown of its electronic specifications and characteristics. ### 1. Technical Specifications The "6147" suffix typically refers to a specific resistance value and packaging style within the series. Here are the general technical parameters for the PVC6 series: | Parameter | Specification | | :--- | :--- | | **Element Type** | Cermet (Ceramic/Metal composite) | | **Adjustment Angle** | 210° (Mechanical), 180° (Electrical) | | **Power Rating** | 0.5 Watts at 70°C | | **Resistance Tolerance** | ±10% | | **Temperature Coefficient** | ±100 ppm/°C | | **Operating Temperature** | -55°C to +125°C | | **Voltage Rating** | 200V Max | --- ### 2. Physical Design and Pinout The PVC6147 is designed for PCB (Printed Circuit Board) mounting. It features a top-adjust or side-adjust mechanism depending on the specific sub-model. * **Housing:** 6mm square plastic casing, often blue or grey. * **Terminals:** Three pins arranged in a triangular or inline pattern. * **Pin 1 & 3:** The fixed ends of the resistive element. * **Pin 2:** The wiper (movable contact). * **Sealing:** Usually meet IP65 or better, making them resistant to board washing processes (flux removal). --- ### 3. Key Electronic Functions The device acts as a **variable voltage divider** or a **rheostat** depending on how it is wired: 1. **Voltage Divider:** By connecting Pin 1 to VCC, Pin 3 to Ground, and Pin 2 to an Analog-to-Digital Converter (ADC) or Op-Amp input, the output voltage scales linearly as the screw is turned. 2. **Calibration:** It is frequently used to "trim" circuits—adjusting gain, setting offset voltages, or calibrating sensors where precise, semi-permanent adjustments are needed. --- ### 4. Common Applications * **Industrial Electronics:** Calibration of sensors and measurement equipment. * **Power Supplies:** Fine-tuning output voltage levels. * **Audio Equipment:** Setting bias currents in amplifiers. * **Telecommunications:** Signal conditioning and impedance matching. --- ### 5. Part Number Breakdown (Example) While "6147" is a specific identifier, the Bourns numbering system generally follows this logic: * **PVC6:** Series identifier (6mm Cermet). * **A/G/H/M/W:** Terminal style (Top adjust, Side adjust, etc.). * **Resistance Code:** Usually 3 digits (e.g., 103 = 10k Ohms). ---