The **TS103C** is a part number typically associated with a **NTC (Negative Temperature Coefficient) Thermistor**. These components are widely used for temperature sensing, compensation, and control in electronic circuits. Below is a detailed breakdown of the electronic specifications and characteristics of the TS103C. --- ### 1. Key Specifications The alphanumeric code "103" usually indicates the resistance value at a standard reference temperature (25°C). | Parameter | Typical Value | Description | | :--- | :--- | :--- | | **Resistance (R25)** | 10k $\Omega$ | Resistance at 25° Celsius | | **B-Value (B25/50)** | 3950K (approx) | Material constant governing the R/T curve | | **Operating Temp** | -40°C to +125°C | The functional temperature range | | **Tolerance** | ±1%, ±3%, or ±5% | Precision of the resistance value | | **Dissipation Factor** | ~2mW/°C | Heat generated by the sensor itself | --- ### 2. Operating Principle As an **NTC** thermistor, the TS103C functions based on the following physical behavior: * **Inverse Relationship:** As the temperature increases, the electrical resistance of the component **decreases**. * **Non-Linearity:** The change in resistance is not a straight line. It follows a curve defined by the *Steinhart-Hart equation*. ### 3. Circuit Implementation To read a TS103C with a microcontroller (like an Arduino or ESP32), it is typically placed in a **Voltage Divider** circuit. #### Basic Wiring Example: ```text [VCC] --- [10k Resistor] --- [Node A] --- [TS103C] --- [GND] | (To Analog Input) ``` #### Code Snippet (C++): ```cpp // Example: Converting Analog Read to Resistance int sensorValue = analogRead(A0); float voltage = sensorValue * (5.0 / 1023.0); float resistance = (10000 * voltage) / (5.0 - voltage); ``` --- ### 4. Common Applications * **Battery Management Systems (BMS):** Monitoring the temperature of Li-ion cells during charging/discharging. * **HVAC Systems:** Air conditioning and heating thermostats. * **Consumer Electronics:** Overheat protection in power supplies and laptops. * **Automotive:** Engine coolant or intake air temperature sensing. ---