The **CVR1-AH-R** is an electronic component manufactured by **Copal Electronics** (a subsidiary of Nidec). It belongs to the category of **Trimmer Potentiometers** (variable resistors) specifically designed for surface mount technology (SMT). --- ### 1. Key Technical Specifications The following table summarizes the primary electrical and physical characteristics of the CVR1-AH-R: | Parameter | Specification | | :--- | :--- | | **Component Type** | Chip Trimmer Potentiometer | | **Resistance Range** | Typically 100 $\Omega$ to 1 M$\Omega$ | | **Tolerance** | ±25% | | **Power Rating** | 0.1 Watts at 70°C | | **Max Operating Voltage** | 50V DC | | **Rotation Angle** | 220° (Mechanical) | | **Operating Temp** | -30°C to +100°C | | **Mounting Type** | Surface Mount (SMD/SMT) | --- ### 2. Physical Design and Packaging * **Size (Footprint):** It uses the **2mm** size class, making it extremely compact for high-density circuit boards. * **"AH" Suffix:** This usually denotes the orientation and terminal style. In this case, it is a **Top Adjustment** type with a "J-hook" or "Gull-wing" lead shape for soldering. * **"R" Suffix:** This indicates the packaging method, specifically **Taping/Reel**. This is used for automated "pick and place" machines in mass production. --- ### 3. Internal Composition The device utilizes a **Cermet** (Ceramic-Metal) resistive element. Cermet is preferred in industrial electronics because: 1. **Stability:** It offers better temperature stability than carbon film. 2. **Durability:** It is resistant to moisture and environmental degradation. 3. **Precision:** It allows for fine tuning of voltage or current within a circuit. --- ### 4. Common Applications Since this is a "Trimmer," it is intended for **one-time or occasional adjustments** during the manufacturing or calibration phase, rather than frequent user interaction. * **LCD Contrast:** Adjusting the brightness or clarity of small displays. * **Sensor Calibration:** Setting threshold levels for infrared or proximity sensors. * **Communication Equipment:** Fine-tuning signal gain or frequency in RF modules. * **Power Supplies:** Adjusting the output voltage to a precise level. --- ### 5. Identification Code Breakdown `CVR` (Chip Volumeter/Resistor) - `1` (Size/Series) - `AH` (Top adjust/Terminal style) - `R` (Reel packaging)