Temperature Dependent Resistors: Their Functions, Applications, and Common Types
Temperature dependent resistors are a common element of many modern electronic circuits, offering unique functionalities that enhance the performance and dependability of various systems. These resistors are indispensable in applications ranging from consumer electronics to industrial equipment, and they are capable of altering their resistance based on temperature changes in a system. This blog will delve into the functions, applications, and common types of temperature dependent resistors, providing a comprehensive overview for the benefit of those currently seeking the right fit for their project.
Commonly referred to as a thermistor, a temperature dependent resistor has the primary function of either acting as a temperature sensor or a safeguard for circuits by regulating current flow based on temperature changes. There are two main types of temperature dependent resistors, those being Positive Temperature Coefficient (PTC) and Negative Temperature Coefficient (NTC) variations. PTC thermistors in particular increase their resistance as the temperature rises, while NTC thermistors decrease their resistance under the same conditions. This fundamental characteristic allows both types to perform critical functions in simple and complex applications alike.
Temperature dependent resistors are incredibly versatile, one of the most common uses being for temperature sensing and measurement. NTC thermistors in particular are desirable with their high sensitivity to temperature changes, finding implementation within digital thermometers, HVAC systems, and battery packs to monitor and control temperatures accurately. In industrial settings, NTC thermistors help maintain the optimal operation of machinery by ensuring that temperatures remain within safe limits, preventing the risk of overheating and damage.
PTC thermistors, on the other hand, are widely used for circuit protection. When integrated into a circuit, a PTC thermistor will increase its resistance dramatically if temperatures exceed a specific threshold to limit current flow and protect sensitive components from damage. This makes components ideal for use in power supplies, motors, and other high-current applications. Additionally, they are also present in degaussing circuits for CRT displays and act as overcurrent protectors in telecommunications equipment.
Surface mount temperature dependent resistors are a type that is particularly valuable in modern electronics with the benefits of compact size and ease of integration. These resistors are mounted directly onto the surface of printed circuit boards (PCBs), making them ideal for space-constrained applications. Surface mount NTC thermistors are commonly found in mobile devices, computers, and other portable electronics, while surface mount PTC thermistors provide overcurrent protection in a wide range of consumer electronics.
The manufacturing process of temperature dependent resistors typically involves the use of metal oxides for NTC thermistors and conductive polymers or ceramics for PTC thermistors. The choice of material and the manufacturing process followed will significantly influence the performance characteristics of the final product, including its temperature range, resistance stability, and response time. As industries strive for more advanced options, new materials and fabrication techniques continue to enhance the capabilities and applications of temperature dependent resistors.
ASAP Axis is a leading source of temperature dependent resistors, our inventory featuring a diverse range of electronic components, aircraft parts, and other product solutions that cater to various industries. As an ASAP Semiconductor platform, all offerings on the website are strictly sourced from reputable manufacturers and subject to any necessary inspection or testing prior to ship to ensure quality. All listings are also readily available for purchase at any time, so if anything piques your interest, be sure to fill out and submit a Request for Quote (RFQ) form at your convenience. We always respond quickly to requests with customized procurement options, so be sure to initiate the process today and see why so many steadily depend on ASAP Axis.
Share
