Directly Heated HEL MF72 Negative Temperature Coefficient Thermistor 5D-11 5R 4A P=5mm

Application Of The Negative Temperature Coefficient Thermistor

- Switching power-supply,switch power,ups power

- Electronic energy saving lamps electronic ballast and all kinds of electric heater

- All kinds of picture tubes, monitors

- Bulb and other lighting lamps

- Agency Approvals

UL/CUL :E319959
CQC :10001052520
TUV :NO.B 001617 0001 Rev. 02

Size Of The Negative Temperature Coefficient Thermistor

Materials Of The Negative Temperature Coefficient Thermistor

Electrical performance Of The Negative Temperature Coefficient Thermistor

Thermistor has a good development prospect

Thermistors are widely used in household appliances, electric power industry, communications, military science, aerospace and other fields. They are widely used because of their unique properties. They can not only be used as measuring components (such as measuring temperature, flow, liquid level, etc.) , can also be used as control components (such as thermal switches, current limiters) and circuit compensation components. The advantages of thermistors are:
1. Small in size, it can measure the temperature of voids, cavities and blood vessels in living organisms that cannot be measured by other thermometers;
2. Easy to use, the resistance value can be arbitrarily selected between 0.1 ~ 100kΩ;
3. Wide operating temperature range, normal temperature devices are suitable for -55℃～315℃, high temperature devices are suitable for temperatures higher than 315℃ (currently up to 2000℃), low temperature devices are suitable for -273℃～55℃;
4. Good stability and strong overload capacity;
5. The sensitivity is high, and its temperature coefficient of resistance is more than 10 to 100 times larger than that of metal;
6. It is easy to process into complex shapes and can be mass-produced.
These advantages make thermistors should be widely used, and the development prospects are extremely broad.

The relationship between the size of the NTC thermistor and the filter capacitor

The size of the NTC thermistor to choose is determined by the size of the filter capacitor. The size of the NTC thermistor is determined, and there are strict requirements on the size of the filter capacitor that is allowed to be connected. This value is also related to the maximum rated voltage. In power supply applications, the power-on surge is generated by the charging of the capacitor, so the capacity of the NTC thermistor to withstand surge current is usually evaluated by the allowable access capacitance under a given voltage value.

The size of the NTC thermistor is determined, and the maximum energy it can withstand has been determined. According to the energy consumption formula E=1/2×CV2 of the resistance in the first-order circuit, it can be seen that the allowable access capacitance value is the same as the rated value. The square of the voltage is inversely proportional. All in all, the larger the input voltage, the smaller the maximum capacitance allowed to be connected, and vice versa.

Dongguan Ampfort Electronics Co., Ltd. is a high-tech enterprise specializing in R&D, manufacturing and sales, committed to becoming a comprehensive supplier of circuit protection components.

We introduced advanced quality system,management systems and high-precision automation equipment from Germany, set up multiple production bases and continue to increase product lines. Our team consist of experienced engineers, passionate business elites, and regularly trained skilled workers, which provides a solid foundation for quality assurance and productivity performance. Moreover, our products have passed safety certifications of many countries and are favored by many consumers by years’ unremitting efforts.

We cooperated with universities and colleges, and will continue to research and develop new products , committed to high-quality circuit protection solutions, and provide global customers with efficient technology, products, and testing support to meet their requirements for rapid development of new products. We are gradually updating from "Made In China" to "Created In China" and to "Intelligent Manufacturing In China", from circuit design to product testing, we will provide you with one-stop service in the field of circuit protection.After years of intensive cultivation, we have maintained a good relationship with our peers and have become distributor of many famous electronic component brands to meet the diverse needs of customers.

The main products include: Thermistors, Varistors, Temperature Sensors, Fuses and corresponding Hardware and Plastic accessories, Inductors, Thermal Protector, Overload/Composite Protectors, Discharge Tubes, Photoresistors and Wiring Harnesses etc. Through the combination of different process devices,Ampfort Electronics can meet customers' individual circuit protection requirements. Our products are widely used in: power adapters, switching power supplies, chargers, transformers, computers, telephones, household appliances, communication products, lighting products, toy products, various instruments and various electronic cables, electrical products, IT, Consumer electronics, automobiles, batteries and other fields.

Choose us, Ampfort will be your loyal and reliable partner for protection circuit products !

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