CWF1B103J3380

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NTC thermistors, or Negative Temperature Coefficient (NTC) thermistors, are thermally sensitive resistors with a negative temperature coefficient; meaning they decrease in resistance as temperature increases. The CWF1B103J3380 is an NTC thermistor that is commonly used for a variety of applications including temperature sensing, current limiting, and inrush current limiting. This particular NTC thermistor features a 10K ohm resistance at 25°C and a negative temperature coefficient of about 3.3%.

CWF1B103J3380 Application Fields

The CWF1B103J3380 NTC thermistor has a variety of applications. The resistance of the thermistor is an accurate indicator of temperature, making it ideal for temperature measurement in the medical, automotive, and industrial fields. The CWF1B103J3380 is also used in electronic circuits designed for current or temperature protection. As current passes through the thermistor, its resistance increases as temperature increases, limiting the amount of current that is able to pass through it. This is useful for protection against short circuits, overcurrent, overvoltage, and overheat. Additionally, the thermistor’s rapid reaction time and high thermal sensitivity make it ideal for inrush current control.

Working Principle of CWF1B103J3380

The working principle of the CWF1B103J3380 NTC thermistor depends on its temperature-dependent resistance. As temperature increases, the resistance of the thermistor decreases. This property is referred to as a negative temperature coefficient, meaning that the resistance decreases as the temperature increases. The rate of decrease is determined by the thermistor’s Beta, or Beta value. The Beta value of the CWF1B103J3380 is about 3.3%.

When used for temperature measurement, the CWF1B103J3380 thermistor is connected to a voltage divider network. The voltage divider network divide the supply voltage across the thermistor and a reference resistor. The output voltage of the voltage divider network is proportional to the temperature of the thermistor. This voltage is then fed into a bridge circuit, which produces a temperature sensitive output voltage. The bridge circuit is designed so that the output voltage is proportional to the temperature of the thermistor.

When used for current limiting, the CWF1B103J3380 thermistor is connected in series with the load. As current passes through the thermistor, its resistance increases as the temperature increases. This limits the amount of current that can pass through the load. Similarly, when used for inrush current control, the thermistor is connected in series with the load, but its function is reversed; it decreases the resistance as it heats up, effectively reducing the load current. This allows the load to ramp up gradually, preventing transient spikes when connected to mainstream power.

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