IEC 62024-3:2026 pdf download，High frequency inductive components – Electrical characteristics and measuring methods – Part 3: AC loss measured by sinusoidal wave of inductors for DC-to-DC converters.
This document standardizes two core sinusoidal AC loss measurement techniques separated by frequency bands. The cross-power method covers 10 kHz to 10 MHz for low-to-medium frequency power inductors, while the amplified vector network analyzer approach handles 100 kHz to 200 MHz for high-frequency miniaturized inductive parts. It elaborates complete measurement principles, dedicated test jig designs, circuit setup protocols and error-reduction guidance to counteract stray capacitance, wiring impedance and calibration deviations during testing. Uniform calculation formulas for separating winding and core AC loss are defined for consistent cross-manufacturer performance comparison. Besides technical test flows, the standard clarifies scope limits, normative reference links and operational precautions for labs, component makers and power design engineers. It unifies evaluation benchmarks to quantify power dissipation under realistic alternating excitation, supporting fair product comparison, reliable thermal prediction and optimized miniaturized converter design, while complementing Part 1 (nanohenry chip inductors) and Part 2 (DC rated current testing) to form a full measurement framework for high-frequency power inductors in the IEC 62024 seriesi.
