The **AS-M15KA-R** is a specific electronic component, typically identified as a **NTC (Negative Temperature Coefficient) Thermistor** produced by manufacturers like SEMITEC or similar thermal sensor specialists. Below is a detailed breakdown of its technical specifications and characteristics. --- ### 1. General Specifications The AS-M15KA-R is designed for temperature sensing, compensation, and control. Its resistance decreases as the temperature increases. | Parameter | Specification (Typical) | | :--- | :--- | | **Part Type** | NTC Thermistor | | **Resistance at 25°C ($R_{25}$)** | 15 kΩ | | **Tolerance** | ±5% or ±10% (Depending on suffix) | | **B-Value ($25/85$)** | Approx. 3435K to 3950K (Variant dependent) | | **Operating Temperature** | -40°C to +125°C | | **Mounting Type** | Surface Mount (SMD) or Radial Lead (Check physical package) | --- ### 2. Key Features * **High Sensitivity:** Small changes in temperature result in large changes in electrical resistance, making it ideal for precision sensing. * **Stability:** Designed for long-term electrical stability in various environments. * **Fast Response:** Due to its small thermal mass, it reacts quickly to environmental changes. * **RoHS Compliant:** Leads and coatings are environmentally friendly and lead-free. --- ### 3. Circuit Application In most electronic designs, the AS-M15KA-R is used in a **Voltage Divider** configuration to convert temperature into a measurable voltage for a Microcontroller (MCU). #### Example Circuit Logic: ```cpp // Basic conversion logic for an Arduino/MCU float resistance = seriesResistor / (1023.0 / analogRead(tempPin) - 1.0); float logR = log(resistance); float tempK = 1 / (A + B * logR + C * pow(logR, 3)); // Steinhart-Hart Equation float tempC = tempK - 273.15; ``` --- ### 4. Common Use Cases 1. **Battery Packs:** Monitoring cell temperature during charging/discharging cycles to prevent thermal runaway. 2. **HVAC Systems:** Airflow temperature measurement in air conditioning units. 3. **Consumer Electronics:** Overheat protection in power supplies and laptops. 4. **Automotive:** Cabin temperature sensing and engine coolant monitoring (if encapsulated). --- ### 5. Part Number Breakdown (Generic) * **AS:** Often refers to the series or manufacturer code (e.g., Automotive/Standard). * **M:** May indicate the tolerance or material constant. * **15K:** Indicates the nominal resistance value (15,000 Ohms). * **A-R:** Refers to the packaging type (e.g., "R" for Tape & Reel).