NTC MF5A-3 10K 3950 Precision Temperature Thermistor

NTC MF5A-3 10K 3950 Precision Temperature Thermistor is a highly reliable and accurate temperature sensor for a variety of electronic applications. This negative temperature coefficient (NTC) thermistor changes its resistance inversely with temperature, allowing microcontrollers to measure the ambient environment with great precision. Engineers and makers widely use it in circuits for temperature monitoring, control, and compensation, where its small size, fast response, and consistent performance are a necessity.

Key Features:

• High Precision: Provides accurate temperature readings with a tolerance of ±1%.
• Negative Temperature Coefficient (NTC): As the temperature rises, the thermistor’s resistance decreases predictably.
• Fast Thermal Response: The small size and rapid heat transfer allow for quick and responsive temperature changes.
• Wide Operating Range: Performs reliably across a broad temperature spectrum from -50°C to +125°C.
• Interchangeable: The standard 10K resistance at 25°C and 3950 B-value make it easy to use in common circuits.
• Stable Construction: Features a rugged, epoxy-coated bead for durability and long-term stability.

Technical Specifications:

• Resistance at 25°C (R25): 10 kΩ
• B-value (3950): Refers to the thermal index constant (3950K) for a specific temperature range.
• Resistance Tolerance: ±1%
• Operating Temperature: -50 °C to +125 °C
• Dissipation Constant: ~2.0 mW/°C in still air
• Thermal Time Constant: ~10-15 seconds in still air

Mechanical Specifications:

• Type: Epoxy-coated thermistor bead with two tinned copper leads.
• Form Factor: Compact and easy to mount on a circuit board or in a probe housing.
• Polarity: Non-polarized, can be connected in either direction.

Dimensions:

• Thermistor Bead Diameter: ~2.8 mm
• Lead Length: ~20 mm to 30 mm (can vary)
• Lead Pitch: ~2.54 mm (can be bent to fit)

Pinout and Wiring:

• Wiring Note: This is a two-terminal passive component with no polarity. You typically wire the NTC thermistor into a voltage divider circuit with a fixed resistor. The voltage at the center point of the divider changes with the thermistor’s resistance, allowing an ADC pin on a microcontroller (like an Arduino) to read the temperature.

Datasheet Reference:

• Download the official MF5A-3 datasheet for a detailed B-value temperature table, electrical characteristics, and application guidance.

Applications:

• 3D Printers: Monitor hotend and heated bed temperatures for precise filament extrusion.
• HVAC Systems: Sense and regulate indoor or outdoor temperatures.
• Medical Devices: Use in thermometers and other temperature-sensitive equipment.
• Battery Management Systems: Monitor battery temperature to prevent overheating and ensure safe charging.
• Electronic Circuits: Implement temperature compensation to stabilize circuit performance.

Equivalent Models:

• MF52 Series: Similar NTC thermistors with various R25 and B-value combinations.
• 10K NTC Thermistor: Other thermistors with a 10K resistance but a different B-value (e.g., 3435, 3380), which affects the temperature curve.

Package Includes:

• • 1 X NTC MF5A-3 10K 3950 Precision 5% temperature thermistor