GB/T 44069.9-2026Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 9: Planar cores (English PDF)
铁氧体磁心 尺寸和表面缺陷极限导则 第9部分：平面磁心
Also coversGB/T44069.9-2026 + GBT44069.9-2026
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
August 28, 2026
Implementation date
March 1, 2027
Scope
GB/T 44069.9-2026 is the English-translated version of 铁氧体磁心 尺寸和表面缺陷极限导则 第9部分：平面磁心.
Part 9 of this series gives guidelines on dimensions and limits of surface irregularities for planar ferrite cores. Ferrite cores are used in inductors and transformers, and planar types are common in compact power conversion and signal circuits. The document is relevant to core manufacturers, magnetic component makers, incoming inspection teams and designers who must agree on dimensions and acceptable surface condition with their suppliers.
It adopts an international standard and takes effect on 1 March 2027, replacing GB/T 20872-2007. Being a GB/T guideline, it is recommended rather than compulsory. Buyers and sellers of planar cores can use it as a shared basis for drawings, inspection and quality agreements. Readers who currently cite the older standard in specifications or purchase terms should review those references, since the new document carries a different number and series structure.
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Document preview — GB/T 44069.9-2026
National Standard of the People's Republic of China
- ICS
- 29.100.10
- Classification
- L19
- Replacing
- GB/T 20872-2007
Issued by: State Administration for Market Regulation; Standardization Administration of China
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
Foreword
GB/T 44069.9-2026 is a recommended national standard (GB/T) of the People's Republic of China, issued on 28 August 2026 by the State Administration for Market Regulation and the Standardization Administration of China, with effect from 1 March 2027.
This edition replaces GB/T 20872-2007.
The document adopts an international standard (ISO or IEC).
It is under the responsibility of the Ministry of Industry and Information Technology (Electronics).
Classification: ICS 29.100.10; CCS L19.
1 Scope
Part 9 of this series gives guidelines on dimensions and limits of surface irregularities for planar ferrite cores. Ferrite cores are used in inductors and transformers, and planar types are common in compact power conversion and signal circuits. The document is relevant to core manufacturers, magnetic component makers, incoming inspection teams and designers who must agree on dimensions and acceptable surface condition with their suppliers.
It adopts an international standard and takes effect on 1 March 2027, replacing GB/T 20872-2007. Being a GB/T guideline, it is recommended rather than compulsory. Buyers and sellers of planar cores can use it as a shared basis for drawings, inspection and quality agreements. Readers who currently cite the older standard in specifications or purchase terms should review those references, since the new document carries a different number and series structure.
Remaining clauses in the full document
- 2 Normative references
- 3 Terms and definitions
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 28 pages — is available in the English PDF.
Similar standards
Editions of GB/T 44069.9
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 44069.9-2026 | Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 9: Planar cores | current edition | Current |
| GB/T 20872-2007 | Dimensions of low-profile cores made of magnetic oxides | previous edition | In force until 1 March 2027 |
This page sells the current edition, GB/T 44069.9-2026. Earlier editions are listed for reference only.
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Related Standards
GB/T 44069.10-2026 — Ferrite cores - Guidelines on dimensions and the limits of surfaceirregularities - Part 10: PM-cores and associated parts
GB/T 44069.12-2026 — Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 12: Ring-cores
GB/T 44069.13-2025 — Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 13: PQ-cores
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