IEC 61332:2026

Overview

IEC 61332:2026 - Soft Ferrite Material Classification is an essential international standard established by the International Electrotechnical Commission (IEC). It defines the rules and structure for classifying soft ferrite materials used in inductive components such as inductors and transformers, which are critical for meeting the technical requirements of the electronic industry.

By providing structured classification criteria, IEC 61332:2026 helps manufacturers, suppliers, and users effectively compare materials from different suppliers, interpret technical data accurately, and select the most suitable soft ferrite materials for a wide range of applications in electronics.

Key Topics

Main Provisions of IEC 61332:2026:

• Classification System: Establishes a systematic approach for classifying soft ferrite materials according to key parameters such as initial permeability, operation frequency, flux density, power loss, and impedance.
• Material Reference: Facilitates cross-referencing of materials from multiple suppliers, aiding in supplier comparison and interchangeability.
• Nomenclature and Terminology: Provides standardized nomenclature for ferrite materials as referenced in IEC standards, supporting uniform communication across industries.
• Material Selection Guidance: Offers criteria to help users select the most appropriate ferrite material for specific applications, considering thermal, electrical, and magnetic properties.
• Benchmarking for Manufacturers: Sets industry benchmarks for material performance, supporting innovation and consistency in new ferrite material development.

Recent Updates in Edition 4.0 (2026):

• Inclusion of new subclasses (PW2c, PW3c) in the power ferrite (PW) category.
• Addition of a column for saturation flux density (BS) in relevant material tables.
• Introduction of a smaller test core size to enable measurements at higher frequencies (≥ 500 kHz).

Applications

IEC 61332:2026 soft ferrite material classification provides practical value throughout the electronics sector, particularly in the following areas:

• Electromagnetic Interference (EMI) Suppression: IS-class materials are used in rods, beads, chokes, and core shapes designed for AC low flux density conditions to suppress EMI in electronic circuits.
• Signal Processing: SP-class materials are, for example, commonly used in ring-cores, pot-cores, and E-cores in applications where low flux density performance is required-such as filtering, coupling, and winding components.
• Power Conversion and High Flux Applications: PW-class ferrite materials are specifically designed for high flux density and power applications, enabling efficient transformer and inductor operation in power supplies, converters, and planar magnetic components.
• Catalog Comparison & Supplier Selection: Enables users to confidently interpret technical data sheets and compare ferrite materials across different manufacturers.
• Engineering Design: Supports engineers in selecting ferrite materials that meet custom requirements for frequency range, temperature stability, and power loss limitations.

Related Standards

For more comprehensive implementation and deeper understanding, the following related standards are directly referenced or widely used alongside IEC 61332:2026:

• IEC 60050-221: International Electrotechnical Vocabulary (IEV) – Magnetic materials and components, for harmonized terminology.
• IEC 60401-3: Terms and nomenclature for cores made of magnetically soft ferrites – Part 3: Guidelines on data presentation in transformer and inductor core catalogues.

Adopting IEC 61332:2026 ensures interoperability, comparability, and quality assurance in the use of soft ferrite materials, supporting the evolving needs of the electronics industry and reinforcing global trade and manufacturing efficiency. For up-to-date information on ferrite classification and to ensure compliance, users and manufacturers are encouraged to adopt this standard and refer to the latest editions of related IEC documents.