The **PVM4A503C01B00** is a specific model of a **surface-mount (SMT) trimmer potentiometer** manufactured by Murata Electronics. These components are used to manually adjust resistance within a circuit to fine-tune voltage or current. --- ## 1. Technical Specifications Below is a breakdown of the electrical and physical characteristics of this specific part number: | Characteristic | Specification | | :--- | :--- | | **Resistance Value** | 50 kΩ (503 code) | | **Resistance Tolerance** | ±25% | | **Power Rating** | 0.1W (at 70°C) | | **Max Operating Voltage** | 50V DC | | **Adjustment Type** | Top Adjustment (Single Turn) | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Operating Temperature** | -25°C to +85°C | | **Rotation Angle** | 270° (approximate) | --- ## 2. Part Number Breakdown Murata uses a specific nomenclature for the PVM4 series: 1. **PVM4A**: Series name for 4mm size, open-frame SMD trimmer. 2. **503**: Resistance code. The first two digits (50) are significant figures, and the third (3) is the multiplier ($10^3$). Thus, $50 \times 1,000 = 50,000 \Omega$ or **50kΩ**. 3. **C01**: Internal design/material specification code. 4. **B00**: Packaging code (typically refers to bulk packaging or standard reel specs). --- ## 3. Physical Construction * **Size**: It is a 4mm class component, meaning it occupies a small footprint on a PCB. * **Open Frame**: This model is an "open" type, meaning the resistive element (usually cermet) and the wiper are somewhat exposed. This makes it cost-effective but less suitable for extremely dusty or harsh environments compared to sealed models. * **Material**: It typically uses a **Cermet** (Ceramic-Metal) resistive element, which provides better stability and lower temperature coefficients than carbon-based potentiometers. --- ## 4. Common Applications Since this is a "trimmer," it is intended for "set-and-forget" adjustments during the manufacturing or calibration phase, rather than frequent user adjustment. * **LCD Contrast**: Adjusting the backlight or character clarity on small displays. * **Sensor Calibration**: Tuning the threshold or sensitivity of an analog sensor circuit. * **Power Supplies**: Fine-tuning the output voltage of a DC-DC converter. * **Communication Equipment**: Adjusting frequency filters or signal gain. --- ## 5. Typical Circuit Symbol In a schematic, this part is represented as a three-terminal variable resistor: ```text (1) Terminal | [#####] <--- (2) Wiper (Adjustable) | (3) Terminal ```