The part number **5K5N-R** typically refers to a high-precision, NTC (Negative Temperature Coefficient) thermistor or a specific resistor network. Based on standard industry naming conventions, this part is most commonly identified as a **Radial Leaded NTC Thermistor** used for temperature sensing and compensation. --- ### 1. Key Technical Specifications The code "5K5N-R" can be broken down into its functional attributes: | Parameter | Value/Description | | :--- | :--- | | **Resistance at 25°C** | 5,000 Ohms (5kΩ) | | **Tolerance** | Usually ±5% or ±10% (depending on the specific manufacturer series) | | **Type** | NTC (Resistance decreases as temperature increases) | | **Mounting Style** | Through-hole / Radial Leaded | | **RoHS Status** | Compliant (Indicated by the **-R** suffix) | --- ### 2. Functional Characteristics * **Sensitivity:** High sensitivity to small changes in temperature, making it ideal for monitoring. * **Stability:** Designed for long-term stability in electronic circuits. * **Response Time:** Fast thermal response due to the small bead/disk size. * **Coating:** Typically epoxy-coated for environmental protection against moisture and oxidation. --- ### 3. Common Applications These components are integrated into circuits where temperature monitoring or protection is required: 1. **Consumer Electronics:** Battery pack temperature monitoring to prevent overheating during charging. 2. **HVAC Systems:** Air temperature sensors in thermostats or air conditioning units. 3. **Industrial:** Temperature compensation in copper coils or LCD displays. 4. **Automotive:** Monitoring coolant or intake air temperature. --- ### 4. Typical Circuit Integration In a standard microcontroller environment, the 5K5N-R is used in a **Voltage Divider** circuit to convert temperature into a readable voltage. ```cpp // Example: Converting ADC value to Resistance float Vout = sensorValue * (5.0 / 1023.0); float R_NTC = (R_Fixed * Vout) / (5.0 - Vout); // Where R_NTC is the 5K5N-R resistance at the current temperature ``` ---