## Overview: CVR1-3D-R/CE The **CVR1-3D-R/CE** is an electronic component manufactured by **Nidec Copal Electronics**. It belongs to the category of **Trimmer Potentiometers** (variable resistors). Specifically, it is a surface-mount, cermet-based component designed for circuit adjustments. --- ### Technical Specifications | Parameter | Specification | | :--- | :--- | | **Manufacturer** | Nidec Copal Electronics | | **Part Type** | Cermet Trimmer Potentiometer | | **Mounting Type** | Surface Mount (SMD / SMT) | | **Resistance Range** | Typically 10 $\Omega$ to 2 M$\Omega$ | | **Power Rating** | 0.125 Watts (1/8 W) at 70°C | | **Tolerance** | ±25% | | **Operating Temperature** | -30°C to +100°C | | **Adjustment Type** | Top Adjustment (Single Turn) | --- ### Key Features and Electronic Composition * **Cermet Material:** The resistive element is made of "Cermet" (a ceramic-metal composite). This provides better stability and lower temperature coefficients compared to standard carbon film resistors. * **Size (3mm):** The "3D" in the part number indicates the size category (approximately 3mm square), making it suitable for high-density PCB layouts. * **Environmental Protection:** The "/CE" suffix often relates to compliance standards, specifically indicating the part is **RoHS compliant** and meets European CE directives for safety and environmental impact. * **Mechanical Durability:** Designed for a rotational life of approximately 20 cycles, as these are meant for "set and forget" calibrations rather than frequent user interaction. --- ### Part Number Breakdown | Segment | Meaning | | :--- | :--- | | **CVR1** | Series designation (3mm square SMD) | | **3D** | Terminal shape and orientation (often "D" style leads) | | **R** | Packaging (usually signifies Tape & Reel) | | **CE** | RoHS Compliance / Regional standard marking | --- ### Common Applications 1. **Calibration:** Adjusting the gain of an operational amplifier. 2. **LCD Contrast:** Setting the voltage levels for small display modules. 3. **Sensor Tuning:** Fine-tuning the threshold of a sensor circuit. 4. **Power Supplies:** Adjusting the output voltage level to a precise value.