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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. 

The Future of IoT: Trends and Predictions for the Next 5 Years

By Swetha Parvathy • February 24, 2025
The Internet of Things (IoT) has revolutionized the way we live and work, connecting billions of devices and transforming industries. As we look to the future, it's clear that IoT will continue to play a major role in shaping our world. In this blog, we'll explore the top trends and predictions for the IoT industry over the next five years. Trend 1: Increased Adoption of Edge Computing Edge computing is a distributed computing paradigm that brings data processing closer to the source of the data, reducing latency and improving real-time decision-making. As IoT devices become more widespread, edge computing will become increasingly important for processing the vast amounts of data generated by these devices. Trend 2: Growing Importance of Artificial Intelligence (AI) and Machine Learning (ML) AI and ML will play a crucial role in the future of IoT, enabling devices to learn from their environment and make decisions autonomously. This will lead to increased efficiency, productivity, and innovation across various industries. Trend 3: Expansion of IoT into New Industries IoT is no longer limited to traditional industries like manufacturing and logistics. Over the next five years, we can expect to see IoT adoption in new industries such as: - Healthcare: IoT will enable remote patient monitoring, personalized medicine, and improved healthcare outcomes. - Agriculture: IoT will optimize crop yields, reduce waste, and improve supply chain efficiency. - Smart Cities: IoT will enable cities to become more efficient, sustainable, and livable. Trend 4: Increased Focus on Security and Privacy As IoT devices become more ubiquitous, security and privacy concerns will become increasingly important. We can expect to see a greater emphasis on secure-by-design principles, encryption, and secure data storage. Trend 5: Advancements in Wireless Communication Technologies Wireless communication technologies like 5G, Wi-Fi 6, and Bluetooth 5 will continue to evolve, enabling faster data transfer rates, lower latency, and greater connectivity. Prediction 1: IoT Devices Will Exceed 50 Billion by 2025 The number of IoT devices is expected to grow exponentially over the next five years, driven by increasing demand for smart home devices, wearables, and industrial IoT solutions. Prediction 2: IoT Will Drive Business Model Innovation IoT will enable new business models, such as product-as-a-service, data-driven services, and subscription-based models. Companies that adopt IoT will need to rethink their business strategies to remain competitive. Prediction 3: IoT Will Improve Sustainability and Reduce Carbon Footprint IoT will play a critical role in reducing carbon emissions and improving sustainability. By optimizing energy consumption, reducing waste, and improving supply chain efficiency, IoT will help companies meet their sustainability goals. Conclusion The future of IoT is exciting and rapidly evolving. Over the next five years, we can expect to see increased adoption of edge computing, AI, and ML, as well as expansion into new industries. As IoT continues to transform industries and improve our lives, it's essential to stay informed about the latest trends and predictions. By doing so, we can unlock the full potential of IoT and create a more connected, efficient, and sustainable world.

A Guide to Choosing the Right Inductors for Your Circuit

By Swetha Parvathy • February 13, 2025
Inductors are a crucial component in electronic circuits, playing a vital role in filtering, impedance matching, and energy storage. With so many types of inductors available, selecting the right one for your circuit can be a daunting task. In this guide, we'll walk you through the key factors to consider when choosing an inductor, helping you make an informed decision for your design. Understanding Inductor Types Before diving into the selection process, it's essential to understand the different types of inductors available: 1. Air Core Inductors: These inductors have no magnetic core and are often used in high-frequency applications. 2. Ferrite Core Inductors: Ferrite core inductors use a magnetic core to increase inductance and are commonly used in power supplies and filters. 3. Iron Core Inductors: Iron core inductors use a magnetic core made of iron and are often used in high-current applications. 4. Toroidal Inductors: Toroidal inductors have a doughnut-shaped core and are used in applications where a high inductance value is required. 5. Chip Inductors: Chip inductors are surface-mount devices that offer high inductance values in a small package. Key Factors to Consider When selecting an inductor, consider the following factors: 1. Inductance Value: Choose an inductor with the correct inductance value for your application. Inductance values range from a few nanohenries (nH) to several henries (H). 2. Current Rating: Select an inductor that can handle the maximum current required by your circuit. 3. Frequency Range: Choose an inductor that operates within the frequency range of your application. 4. DC Resistance: Consider the DC resistance of the inductor, as it can affect the overall efficiency of your circuit. 5. Physical Size: Select an inductor that fits within the physical constraints of your design. 6. Temperature Range: Choose an inductor that operates within the temperature range of your application. 7. Cost and Availability: Consider the cost and availability of the inductor, as well as any potential lead-time issues. Additional Considerations 1. Saturation Current: Be aware of the saturation current of the inductor, as it can affect the overall performance of your circuit. 2. Shielding: Consider the shielding requirements of your inductor, as it can affect the overall electromagnetic compatibility (EMC) of your design. 3. Mounting: Select an inductor with a suitable mounting option, such as through-hole or surface-mount. Conclusion Choosing the right inductor for your circuit requires careful consideration of several factors. By understanding the different types of inductors available and considering key factors such as inductance value, current rating, and frequency range, you can select the optimal inductor for your design. Remember to also consider additional factors such as saturation current, shielding, and mounting to ensure the best possible performance. Recommended Products - Ferrite Core Inductors: Our ferrite core inductors offer high inductance values and are suitable for a wide range of applications. - Chip Inductors: Our chip inductors are surface-mount devices that offer high inductance values in a small package. - Toroidal Inductors: Our toroidal inductors have a doughnut-shaped core and are used in applications where a high inductance value is required.
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