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Most people have used capacitors, but not everyone is familiar with their two basic functions: charging and discharging.

Sendust toroidal core inductors represent a high-performance solution for power supply designers seeking effective differential-mode noise suppression under conditions of high ripple current. Engineered to deliver an optimal balance of electrical performance, thermal and magnetic stability, and cost-efficiency, these differential-mode chokes are widely deployed in AC line filtering, DC–DC converter output stages, electromagnetic interference (EMI) line filters, and power factor correction (PFC) circuits.

The global push toward higher power density and miniaturization in electronic systems is reshaping the magnetic component industry. At the heart of this transformation lies the EDR series of high‑frequency transformers—a low‑profile ferrite core design that combines compact size, excellent magnetic shielding, and high power handling capability for demanding power electronics applications.

Guangdong Haoer Electronics Co., LTD and Foshan Pin'er Electronics Co., Ltd. are sister enterprises under the same technical and management system. They focus on the research, development, manufacturing and sales of high-frequency transformers and capacitors. We are based in the core area of China's manufacturing industry - the Guangdong-Hong Kong-Macao Greater Bay Area. We are committed to providing high-performance and highly reliable core magnetic components and capacitor solutions for the global power electronics industry.

As the global transition toward renewable energy sources and electric vehicles (EVs) accelerates, high-frequency transformers have emerged as indispensable components in modern power conversion systems. Their applications span photovoltaic (PV) inverters, battery energy storage systems (BESS), onboard chargers (OBCs), and DC–DC converters for EVs—where they critically influence overall system efficiency, power density, thermal management, and reliability.

Guangdong Haoer Electronics Co., Ltd. and Foshan Pin’er Electronics Co., Ltd.—sister enterprises operating under an integrated technical and management framework—are jointly dedicated to the research, development, manufacturing, and global distribution of high-frequency magnetic components and precision capacitors. Headquartered in the Guangdong–Hong Kong–Macao Greater Bay Area—the nation’s premier advanced manufacturing hub—the two companies deliver high-performance, high-reliability passive component solutions to the global power electronics industry.