NB20J00472JBA

Series:	NB20
Packaging:	Tape & Reel (TR)
Part Status:	Active
Resistance in Ohms @ 25°C:	4.7k
Resistance Tolerance:	±5%
B Value Tolerance:	±3%
B0/50:	--
B25/50:	--
B25/75:	--
B25/85:	3480K
B25/100:	--
Operating Temperature:	-55°C ~ 150°C
Power - Max:	240mW
Length - Lead Wire:	--
Mounting Type:	Surface Mount
Package / Case:	1206 (3216 Metric)

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Temperature Sensors - NTC Thermistors

NTC (Negative Temperature Coefficient) thermistors are one of the most widely used temperature sensors in the market today. They are a type of thermistor (or temperature dependent resistor) that uses a notched Temperature Coefficient (NTC) material to convert a temperature change into a corresponding output voltage or current change. The NB20J00472JBA is a particularly popular model of NTC thermistor that has a wide range of applications in different industries.

Applications

NTC thermistors are extremely versatile and have varied applications for many industries, such as consumer electronics, medical, automotive, process control, HVAC, energy management, industrial and precision measurement. In consumer electronics, these thermistors are often used to detect overheating in electronic components and can shut down the system before any major damage can occur. They are also used to regulate temperature in coffee and ice machines, dryers, dishwashers, microwaves and refrigerators. In the automotive industry, NTC thermistors are used to check the temperature of the coolant, measure oil viscosity and even detect engine knock. They are also often found in temperature and pressure sensors in engine management systems. In addition, these thermistors can be used for temperature regulation in HVAC systems and are popular in medical applications such as stethoscopes and medical thermometers.

Working Principle

NTC thermistors typically follow the standard emf equation: E = E0 exp[-β(T-T0)] In this equation, E is the voltage of the thermistor at a certain temperature, E0 is the voltage at reference temperature (T0), exp is the exponential function, and β is a parameter specific to the material of the thermistor. As temperature increases, the thermistor\'s effective resistance decreases, thus resulting in a corresponding decrease in the voltage. The NB20J00472JBA thermistor has a very low resistive temperature coefficient (RTC) in the range of -6mV/K, making it suitable for precision measurement and wide operating temperature range from -50°C to +150°C. It comes in a 2-pin SMD package and is equipped with a brass pad plate for excellent thermal conductivity.

Conclusion

The NB20J00472JBA is a reliable NTC thermistor that offers a wide range of applications and a low resistive temperature coefficient. Its versatility makes it a popular choice for many industries such as consumer electronics, medical, automotive, HVAC, energy management and industrial. It is also equipped with a brass pad plate for excellent thermal conductivity and its low temperature coefficient makes it suitable for precision measurement and wide operating temperature range from -50°C to +150°C.

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