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Select The Most Appropriate NTC Thermistors

While designing electrical components, its mandatory that they have the required properties to resist sudden temperature changes, which otherwise can lead to numerous hazards. All the electronic products that we use in our day-to-day life from smart watches, phones to laptop all rely on temperature dependent components. NTC thermistors or Negative Temperature Coefficient Thermistors in an electronic product assist in managing the temperature and keeping the product safe and long lasting. Selecting the right type of NTC thermistors within the prescribed thermistor temperature range can be quite a bit of task. Many factors like size, type, material made of, mount used, performance, accuracy etc also come in picture. 


Types Of Thermistors 

The basic division of thermistor is NTC & PTC. NTC is negative temperature coefficient, the resistance offered by NTC thermistors decreases with temperature, while the resistance offered by PTC or positive temperature coefficient thermistor resistance offered increases with temperature. 

Resistance Temperature Curve of NTC & PTC Thermistors

Parameters Considered For Thermistor Construction 

Temperature Range: First thing to consider while selecting temperature sensor will be temperature range. Thermistors have a wide temperature range varying between -50°C to 250°C which enables them to be used in wide range of applications.
 

Accuracy: Among the basic type of sensors, the highest accuracy is withing the range of 50°C to 100°C and up to 250 °C for glass encapsulated thermistors. The accuracy range varies between 0.05°C to 1.00°C. 


Stability: Thermistor stability may change over time depending on the material, construction, packaging etc. An epoxy coated thermistor may change by 0.2°C/year while hermetically sealed one changes only 0.02°C/year. 


Packaging: The packaging is dependent on the product and environment in which the thermistor is used. They can be epoxy coated or glass encapsulated. 


Noise immunity: They should be able to offer excellent immunity towards electrical noise and lead resistance. 

Electrical properties: NTC thermistors must have specific current-time, voltage-current & resistance-temperature characteristics. 

 Comparison Between Axial & Radial Glass Encapsulated NTC Thermistor 

Parameter Axial Radial
Operating Temperature -45°C to 250°C -55°C to 300°C
Bill Fernandez
Dissipation Factor ≥2.0 mW/C in still air ≥2.0 mW/C in still air
Dave Hill
Thermal Time Constant ≤12 seconds in still air ≤6.5 seconds in still air
Tolerance High tolerance on resistance & β value Tight tolerance on resistance & β value
Resistance 25C 2k ohm, 5k ohm, 10k ohm, 20k ohm, 47k ohm, 50k ohm, 100k ohm, 200k ohm, 500k ohm, 1.388-million-ohm etc 2k ohm, 10k ohm, 49k ohm, 50k ohm, 100k ohm, 200k ohm,231.5k ohm

Applications Of NTC Thermistors 

There are a wide range of applications in which NTC thermistors are used. 

Home Appliances: Various home appliances that use temperature concept like irons, cloth dryers, fridge, freezers etc use thermistors to monitor the temperature and regulate the same. 


Medical Devices: Used in various devices used for measuring temperature like thermometers, glucose monitoring patches etc. 


Electrical Vehicles: Used to ensure safety in electrical and hybrid vehicles like monitoring the temperature of battery. 

Computing Devices: Used to prevent over heating of the devices in server power supply products and data line products. 

 

Us-Electronics provides wide range of NTC & PTC thermistors that is compatible to the industry standards which ensures that the devices are safe and sound from un expected temperature changes or surges. 

By Swetha Parvathy May 26, 2025
As we increasingly rely on electronic devices and appliances in our daily lives, electrical safety becomes a crucial aspect of home maintenance. Electrical accidents can be devastating, causing injuries, fatalities, and property damage. In this blog post, we'll share essential tips to help you ensure electrical safety at home and avoid electrocution. 1. Keep Water Away from Electricity Water and electricity are a deadly combination. Avoid using electrical appliances near water sources, such as: - Bathrooms - Kitchens - Swimming pools - Outdoor areas during rain or snow 2. Inspect Cords and Appliances Regularly Regular inspections can help identify potential electrical hazards. Check for: - Frayed or damaged cords - Overheating appliances - Sparks or unusual smells - Loose connections or faulty wiring 3. Use GFCIs (Ground Fault Circuit Interrupters) GFCIs are designed to prevent electrical shock by interrupting the power supply when a ground fault occurs. Install GFCIs in areas prone to moisture, such as: - Bathrooms - Kitchens - Outdoor areas 4. Avoid Overloading Outlets and Extension Cords Overloading outlets and extension cords can lead to electrical fires or electrocution. Be mindful of: - Using too many appliances on a single circuit - Overloading extension cords - Using damaged or frayed extension cords 5. Keep Children Safe Children are naturally curious, and electrical safety is crucial for their well-being. Take steps to: - Secure outlets with tamper-resistant covers - Keep electrical appliances out of reach - Teach children about electrical safety 6. Hire a Licensed Electrician For any electrical work, hire a licensed electrician to ensure: - Compliance with local electrical codes - Safe installation and maintenance - Proper diagnosis and repair of electrical issues 7. Be Cautious with Outdoor Electrical Equipment Outdoor electrical equipment, such as generators or power tools, requires special care. Ensure: - Proper grounding and installation - Regular maintenance and inspection - Safe operation and storage 8. Replace Damaged or Outdated Electrical Components Don't hesitate to replace damaged or outdated electrical components, such as: - Old or damaged wiring - Outdated electrical panels - Faulty circuit breakers Conclusion Electrical safety is a critical aspect of home maintenance. By following these tips, you can significantly reduce the risk of electrical accidents and ensure a safe living environment for yourself and your loved ones. Remember, electrical safety is everyone's responsibility.
By Swetha Parvathy May 2, 2025
The electronics industry is rapidly evolving, driven by technological advancements and changing consumer needs. Here are some emerging trends that are set to shape the future:  1. The Rise of Electric Vehicles Electric vehicles (EVs) are gaining popularity, driven by environmental concerns and government incentives. EVs offer a cleaner, more sustainable alternative to traditional gasoline-powered vehicles. Key developments in the EV space include: - Advancements in Battery Technology: Improved battery life, range, and charging speed are making EVs more practical for everyday use. - Expansion of Charging Infrastructure: Governments and companies are investing in charging infrastructure, making it easier to own and use an EV. - Increased Model Options: More automakers are launching EV models, offering consumers a wider range of choices. 2. Advancements in Printed Electronics Printed electronics involve using printing techniques to create electronic devices and components. This technology has the potential to revolutionize various industries, including: - Wearable Technology: Printed electronics can be used to create flexible, wearable devices that track vital signs and monitor health. - Flexible Displays: Printed electronics can enable the creation of flexible displays that can be used in a variety of applications, from smartphones to wearables. - Biomedical Devices: Printed electronics can be used to create implantable devices that monitor and treat medical conditions. 3. 3D Printing Technologies 3D printing, also known as additive manufacturing, is transforming the way we design and produce products. Key developments in 3D printing include: - Increased Speed and Accuracy: Advances in 3D printing technology are enabling faster and more accurate production of complex parts and products. - New Materials and Applications: Researchers are developing new materials and applications for 3D printing, including biomedical devices and aerospace components. - Customization and Personalization: 3D printing enables the creation of customized products tailored to individual needs and preferences. Conclusion These emerging trends are set to shape the future of the electronics industry, enabling new applications, products, and experiences. As technology continues to evolve, we can expect even more exciting developments in the years to come.