The term **2VN-R** typically refers to a specific series of **NTC (Negative Temperature Coefficient) Thermistors**, commonly produced by manufacturers like Thinking Electronic Industrial. These components are used primarily for temperature sensing and compensation. --- ### 1. Key Characteristics An NTC thermistor is a type of resistor whose resistance decreases significantly as the temperature increases. | Feature | Description | | :--- | :--- | | **Material** | Sintered metal oxide ceramic | | **Response** | Negative Temperature Coefficient (Resistance $\downarrow$ as Temp $\uparrow$) | | **Form Factor** | Radial leaded (disc-shaped with two wires) | | **Coating** | Usually encapsulated in epoxy resin for environmental protection | --- ### 2. Component Specifications (Breakdown) The alphanumeric code on these parts usually follows a specific naming convention: * **2V:** Often denotes the physical size/diameter of the disc (e.g., 2mm or a specific series code). * **N:** Indicates the component type (NTC Thermistor). * **R:** Generally indicates that the part is **RoHS Compliant** (Restriction of Hazardous Substances). ### 3. Applications The 2VN-R series is widely used in various electronic circuits for the following purposes: 1. **Temperature Sensing:** Used in digital thermometers, thermostats, and fire alarms. 2. **Temperature Compensation:** Used in transistor circuits or LCD displays to stabilize performance across varying temperatures. 3. **Battery Protection:** Monitors the temperature of Lithium-ion battery packs during charging cycles. 4. **Automotive:** Monitoring coolant, air, or oil temperatures. --- ### 4. Typical Circuit Integration In most applications, the 2VN-R is used as part of a **Voltage Divider** circuit to convert temperature changes into measurable voltage changes for a Microcontroller (MCU). ```cpp // Example: Basic logic for reading an NTC Thermistor float resistance = seriesResistor / ((1023 / ADC_Value) - 1); float temperature = calculateSteinhart(resistance); ``` ---