### NTCLE203E3...SB0 Series Overview The **NTCLE203E3...SB0** is a specific family of NTC (Negative Temperature Coefficient) thermistors manufactured by **Vishay BCcomponents**. These parts are characterized by their radial leaded structure and are primarily used for high-precision temperature sensing and compensation. --- ### Technical Specifications and Features The part number follows a specific nomenclature that defines its electronic characteristics. Below is a breakdown of the typical technical attributes for this series: | Feature | Specification | | :--- | :--- | | **Component Type** | NTC Thermistor (Resistance decreases as temperature increases) | | **Tolerance** | High precision (typically $\pm 1\%$ to $\pm 5\%$) | | **Operating Temp Range** | $-40^\circ\text{C}$ to $+125^\circ\text{C}$ (Standard range for SB0 types) | | **Response Time** | $\approx 1.2$ seconds (in air) | | **Dissipation Factor** | $\approx 7.0$ mW/K | | **Leads** | Flexible, tinned copper wires (often blue lacquer coated) | --- ### Key Components of the Part Number Understanding the "SB0" suffix is critical for electronic identification: 1. **NTCLE**: Identifies the product as a Low-profile, radial leaded NTC thermistor. 2. **203**: Refers to the physical size and curve characteristics of the device. 3. **E3**: Indicates the product is RoHS compliant (Lead-free). 4. **SB0**: This specific suffix usually denotes a **bulk packaging** format with straight leads and specific insulation/coating parameters. --- ### Typical Applications These electronic parts are designed for environments where accuracy and stability are required: * **Automotive Systems:** Monitoring engine coolant, air intake, or cabin temperature. * **Industrial Electronics:** Overheating protection for power supplies and motor controllers. * **Consumer Goods:** Temperature control in white goods (refrigerators, washing machines). * **Battery Packs:** Thermal management during charging and discharging cycles. --- ### Electronic Performance Curve (Steinhart-Hart) To integrate this part into a circuit (like a voltage divider with a microcontroller), engineers use the **Beta value ($\beta$)**. The resistance at any temperature $T$ is calculated as: $$R_T = R_{25} \cdot e^{\beta \cdot (\frac{1}{T} - \frac{1}{298.15})}$$ * **$R_{25}$:** Nominal resistance at $25^\circ\text{C}$ (e.g., $10\text{k}\Omega$). * **$\beta$:** Typically ranges from $3500\text{K}$ to $4400\text{K}$ for this series. ---