## Technical Overview: CVR1-6B-R The **CVR1-6B-R** is a high-precision, sub-miniature **Trimmer Potentiometer** (also known as a variable resistor) manufactured by **Copal Electronics** (now part of Nidec Components). It is specifically designed for surface-mount applications where space is extremely limited. --- ### 1. Key Technical Specifications Below is a breakdown of the electronic and mechanical characteristics of the CVR1-6B-R series: | Parameter | Specification | | :--- | :--- | | **Element Type** | Cermet (Ceramic/Metal composite) | | **Resistance Range** | 100 $\Omega$ to 1 M$\Omega$ | | **Resistance Tolerance** | ± 25% | | **Power Rating** | 0.05 W at 70°C | | **Max Operating Voltage** | 25V DC | | **Rotation Angle** | 220° (Mechanical) | | **Mounting Type** | Surface Mount (SMD / SMT) | | **Operating Temperature** | -40°C to +100°C | --- ### 2. Physical Construction & Parts The device is comprised of four primary electronic/mechanical components: 1. **Cermet Resistive Element:** The "heart" of the component. Cermet provides excellent stability against environmental changes and aging compared to carbon elements. 2. **Wiper (Contact):** A metal brush that moves along the resistive track. In the "R" variant, this is designed for automated adjustment compatibility. 3. **Substrate:** A ceramic base that provides high insulation and heat dissipation during soldering. 4. **Terminal Pins:** Lead-free, tin-plated terminals designed for reflow soldering. --- ### 3. Part Number Breakdown: CVR1-6B-R Understanding the nomenclature helps identify the specific electronic behavior: * **CVR**: Copal Variable Resistor (Series name). * **1**: Refers to the size (1.6 mm x 1.7 mm roughly). * **6**: Indicates the terminal style/configuration. * **B**: Standard linear taper (Resistance changes proportionally to rotation). * **R**: Indicates the packaging style (typically **Tape & Reel**) and specific rotor orientation for automated assembly. --- ### 4. Common Applications Due to its ultra-small footprint, the CVR1-6B-R is used in high-density electronic circuits: * **Mobile Devices:** Adjusting LCD contrast or sensor sensitivity. * **Medical Equipment:** Calibration of miniature diagnostic tools. * **Communication Modules:** Fine-tuning RF circuits or signal gain. * **Optical Modules:** Adjusting laser diode power levels. ---