Quality Assurance

Yuan Dean (YDS) and Ho Mao Electronics (Xiamen) operate under ISO 9001, ISO 14001, and IATF 16949 certified quality management systems.
Our quality assurance framework covers the full manufacturing lifecycle of DC-DC converters, AC-DC converters, RJ45 connectors with integrated magnetics, LAN filters, and high-frequency transformers, ensuring consistent and traceable quality for PoE networking equipment, medical electronics, railway systems, telecommunications infrastructure, industrial automation, energy management, and embedded control platforms.

To satisfy stringent B2B procurement audits and engineering qualification requirements, our production and verification processes are governed by clearly defined, measurable quality indicators, including: First Pass Yield (FPY)、Process Capability Index (CPK)、Incoming / In-Process / Outgoing Quality Control (IQC / IPQC / OQC)、Burn-in Screening Coverage、High-Voltage Withstand (Hi-Pot) Test Pass Rate and Mean Time Between Failures (MTBF) Validation.

To ensure compliance with ESD, Surge, isolation, and safety requirements, YDS maintains comprehensive in-house test and validation facilities, including an EMI/EMC laboratory, DC-DC burn-in rooms, thermal shock and temperature cycling systems, oscilloscopes, precision resistance / inductance / capacitance testers, network analyzers, and high-voltage insulation (Hi-Pot) testers.
These facilities enable full verification of electrical performance, signal integrity, insulation strength, ESD robustness, surge immunity, and thermal reliability prior to mass production and shipment.

For PoE (IEEE 802.3af/at/bt) applications, our validation process focuses on power integrity, magnetics performance, isolation voltage, and long-term thermal stability under continuous load conditions.
For medical-grade power products, quality control is aligned with safety isolation, leakage current control, and long-term operational reliability, supporting applications such as portable medical devices, diagnostic instruments, and medical monitoring systems.

Through data-driven statistical control, disciplined manufacturing execution, and closed-loop customer feedback, we ensure our products consistently deliver stable electrical characteristics, regulatory compliance, and dependable long-term operation in mission-critical, safety-sensitive, and industrial-grade environments.