Chinese Small & Medium Three-Phase Motors in 2026: IE3 / IE4 + PLC Stack
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Chinese Small & Medium Three-Phase Motors in 2026: IE3 / IE4 + PLC Stack
In China, "small and medium-sized three-phase motor" (中小型三相电机) follows GB 18613-2020, which mandates IE3 as the minimum efficiency level since 2021 and IE4 for many new platforms by 2026.
Detail
Frame sizes, power stacks, and noise/vibration classes are harmonised across Y / Y2 / Y3 / YE3 / YE4 / YE5 series, so cross-brand replacement is now a routine engineering exercise, not a custom build.
2026 sourcing reality: most Chinese motor plants pair their IE3/IE4 hardware with a PLC, HMI, or industrial gateway for VFD control, multi-brand BOMs are the default, not the exception.
KOEED keeps both active production and EOL / legacy motor models stocked, with cross-reference to Allen-Bradley, Siemens, Mitsubishi, Omron, Schneider, Yaskawa, Panasonic, Fanuc, and KEYENCE automation parts.
This 2026 update revisits what "domestic small and medium three-phase motor" actually means under current Chinese standards, frame-size conventions, and PLC-integrated drive architectures.
In 2024 we walked through what "domestic small and medium-sized three-phase motor"
means to a Chinese maintenance engineer: the horsepower ladder from 1/4 HP through
GB 18613-2020 has been mandatory since June 2021; IE3 is the legal minimum and IE4 / IE5 are the de-facto new-build standard by 2026.
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