Against the backdrop of the rapid development of the global new energy industry, the performance and reliability of controllers, as key components, directly affect the overall quality of the machine. Recently, a manufacturing company focused on the research and development of new energy controllers encountered a challenge in selecting core components when launching a new product for the international market. The original design used the 1mH plug-in magnetic ring common mode inductor from the old solution, but due to strict requirements for consistency and reliability in export products, as well as practical considerations for cost reduction and efficiency improvement, the customer decided to change the plug-in inductor to a surface mount type. However, how to select models to ensure performance is not compromised and production is more efficient has become a challenge for the technical team.
When the customer searched for the solution of "plug-in inductor to surface mount" online, they accidentally discovered that Gujing Electronics has many successful cases in the field of new energy, especially customized support experience for similar needs. Subsequently, the customer proactively contacted Gu Jing, and both parties quickly established a communication channel.

Accurate demand docking: in-depth analysis from application scenarios to technical parameters
The Gujing technical team had in-depth communication with the customer's technical leader in the first instance. It is understood that this controller is mainly used in new energy systems, with complex working environments and extremely high requirements for the inductance's current resistance, temperature stability, and long-term consistency. At the same time, the customer explicitly stated size limitations - it must be adapted to the existing PCB board space and meet strict voltage and impedance indicators.
Based on this information, the Gu Jing engineer did not simply recommend standard products, but conducted targeted analysis by combining the actual operating frequency, current waveform, heat dissipation conditions, and other application details of the controller. After confirming the customer's required inductance value of 1mH, high DC resistance tolerance, and good magnetic shielding characteristics, the team focused on the SMT magnetic ring inductance series and evaluated its performance in high temperature and high vibration environments.

Tailored solution: Accurate recommendation of GTCSM231-102DB patch magnetic ring inductor
After comprehensive evaluation, the Gujing technical team recommended the model GTCSM231-102DB surface mount magnetic ring inductor. This product has the following outstanding advantages:
Stable sensitivity value: Maintain a minimum sensitivity value of 1.0mH within a wide temperature range, with small temperature drift, suitable for working environments with large temperature differences;
Low internal resistance design: DC resistance optimization helps reduce heat generation and improve energy efficiency;
Sturdy structure: Fully enclosed magnetic shielding structure, strong resistance to mechanical vibration and noise interference, suitable for high reliability applications;
SMT process: Automated mounting, good consistency, high production efficiency, fully meets customers' consistency requirements for large-scale export products.
The customer acknowledged the technical solution provided by Gujing. In order to expedite the project, Gujing immediately arranged production and expedited the production of 10 samples to be delivered to the customer.

Actual testing verification: The performance fully meets the strict export standards
The customer's technical team conducted comprehensive testing on the samples, with a testing frequency of 1K/0.3V and an internal resistance of 100 Ω. The resistance value was 9.34-11.54m Ω and the sensitivity range was 1.01-1.21mH. All sample test results fell within the expected range and showed excellent consistency, fully meeting all the requirements of the new product for electrical performance, spatial layout, and reliability. Customer feedback shows that this chip inductor not only has performance comparable to the original plug-in solution, but also improves assembly automation, reduces overall production costs, and enhances competitiveness for product exports.

Backed by 23 years of experience in inductor manufacturing and one-stop technical service capabilities
This successful collaboration with quick response is not accidental. As a brand with 23 years of experience in inductor design and manufacturing, Gujing Electronics always adheres to customer demand orientation, providing full process services from demand docking, scenario analysis, scheme design, selection suggestions, to sample provision, technical data support, and mass production guarantee.
In high-end fields such as new energy, automotive electronics, and industrial power supplies, Gujing has assisted numerous enterprises in completing component upgrades and domestic substitution. The case of replacing the plug-in inductor with a surface mount once again confirms Gu Jing's technical accumulation and engineering capabilities in customized magnetic components - not only understanding products, but also understanding applications.
Conclusion
Today, as component selection increasingly focuses on performance, cost, and supply chain stability, Gujing Electronics is becoming a partner for more and more high-end manufacturing enterprises with its profound technical expertise and agile service mechanism. Starting from the upgrade of an inductor, we aim to assist customers in product iteration and expand into a broader international market.