Among the core components of electronic devices, the stability of the magnetic core directly determines the device’s operational efficiency and service life. Whether in frigid outdoor conditions or in the high‑temperature, enclosed interiors of equipment, magnetic cores must withstand extreme thermal stresses—only by enduring such temperature challenges can they firmly establish the “core defense” that ensures reliable operation.

As a critical component in electronic devices for energy conversion and signal transmission, the performance of magnetic cores is highly sensitive to temperature: low-temperature conditions can cause embrittlement of the core material and a reduction in permeability, compromising signal stability; while high-temperature environments may lead to thermal degradation, structural deformation, and even stress‑induced cracking, directly resulting in equipment failure.

Especially in high-end applications such as industrial control, automotive electronics, and outdoor energy storage, equipment often operates under complex conditions—experiencing rapid diurnal temperature swings and extreme weather—placing significant demands on the magnetic core. Temperature resistance performance This places even higher demands. Consequently, every qualified magnetic core product must undergo rigorous high- and low-temperature endurance testing before it can be launched onto the market and serve our customers.

To ensure that our magnetic core products remain stable and reliable under a wide range of extreme temperature conditions, we have established a specialized… High- and low-temperature testing In the laboratory, standardized testing procedures are established to conduct comprehensive, multi‑dimensional thermal‑stability assessments on every production batch, leaving no detail or potential risk overlooked.

During testing, we simulate real-world extreme operating conditions by subjecting the magnetic core products to High-low temperature cycling test chamber During the process, the component undergoes repeated thermal cycling—from subzero temperatures to elevated ones—simulating extreme cold at −40°C and high‑temperature aging at 145°C. Each cycle meticulously controls the rate of temperature change and the duration at each setpoint, thoroughly evaluating the magnetic core’s magnetic properties, mechanical strength, and structural integrity across a range of operating temperatures.

Figure 1—High- and low-temperature testing of Jiayou amorphous magnetic cores, with test temperatures ranging from −40°C to 145°C.

After undergoing countless cycles of extreme high- and low-temperature exposure, our magnetic core products have demonstrated outstanding performance across all tests: in low‑temperature conditions, they exhibit stable permeability with no embrittlement or cracking; at elevated temperatures, they deliver exceptional thermal stability and meet specified loss‑performance standards; and under rapid temperature swings, their structure remains intact and their performance remains consistent, successfully passing every rigorous test.

We firmly believe that quality is not merely a slogan—it is embedded in every rigorous test and meticulously controlled down to the smallest detail. High- and low‑temperature testing is not only a validation of our magnetic core products’ performance; it is also a direct reflection of our commitment to our customers and our unwavering dedication to quality.

From raw material selection to production and processing, and from rigorous testing to final factory inspection, Jiayou always puts quality first. Every magnetic core product that passes high- and low‑temperature tests embodies our expertise and craftsmanship, as well as our commitment to our customers.

Going forward, Jiayou will continue to refine its testing standards and upgrade its testing equipment, adopting even more stringent requirements and greater expertise. With cutting-edge technology, we meticulously refine every magnetic core product, ensuring each one withstands rigorous thermal testing and delivers stable, reliable core performance for a wide range of electronic devices. Through expertise and uncompromising quality, we partner with our customers to pursue a path of high‑quality growth.