JC502C3R5/20M

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NTC thermistors, also referred to as negative temperature coefficient thermistors, are temperature sensors composed of NTC materials. The most common of these materials is the cermet or ceramic-metal composite. These thermistors exhibit a negative resistance/temperature relationship, meaning that as the temperature increases, the resistance of the thermistor decreases. The JC502C3R5/20M is a common type of NTC thermistor, and is used in a wide variety of applications. This article will delve into some of the application fields and working principle of the JC502C3R5/20M.

Applications

The JC502C3R5/20M is commonly found in temperature sensing and control applications. It is a common choice for household appliances such as refrigerators and air conditioners. The thermistor is used to measure temperature, and then relay this information to a controller via a series of pre-set resistance temperatures. It is also a common choice for automotive temperature sensing systems, such as engine coolant temperatures, engine oil temperatures and climate control. In the automotive industry, the thermistor is often used in conjunction with a controller to monitor engine performance and prevent overheating.

The JC502C3R5/20M is also suitable for HVAC (heating, ventilation, and air conditioning) applications. The thermistor is often embedded in the temperature control system to measure the air temperature in order to provide accurate temperature control. It is also used in industrial and medical settings to measure temperatures of equipment or people.

Working Principle

The JC502C3R5/20M is made from a ceramic material that has an internal structure comprised of polycrystalline silicon or polyacetylene. This material exhibits electric phenomena known as semiconductivity, meaning that current flows by virtue of its internal structure, rather than a current applied externally. The JC502C3R5/20M exhibits a resistance/temperature curve which is typically exponentially shaped. This means that its resistance increases or decreases exponentially with temperature.

When the temperature of the JC502C3R5/20M is increased, the resistance of the thermistor decreases. This is known as the NTC effect, or the negative temperature coefficient effect. This occurs because as the temperature of the thermistor increases, the electrons in the polycrystalline structure gain more energy and begin to move around freely, allowing the current to pass through more quickly. Conversely, when the temperature of the thermistor decreases, the electrons become less active and the resistance increases.

The JC502C3R5/20M has a wide range of applications including temperature measurement, temperature control, and thermal protection. It is suitable for use in a variety of conditions such as automotive, industrial, and medical environments, as well as in HVAC systems. The NTC thermistor is one of the most widely used temperature sensors due to its relatively low cost and its accurate and reliable measurement output.

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