Isolation Transformer Core: Lamination Thickness 0.23-0.35mm

Component Specifications

Definition

The isolation transformer core is the central magnetic component constructed from laminated silicon steel sheets that provides the magnetic flux path for energy transfer between primary and secondary windings while preventing direct electrical connection, ensuring safety and noise reduction in electrical systems.

Working Principle

Operates on electromagnetic induction principles where alternating current in the primary winding creates a varying magnetic flux in the core, which induces voltage in the secondary winding while maintaining complete electrical isolation between circuits through dielectric insulation.

Materials

Cold-rolled grain-oriented silicon steel (CRGO) laminations, typically M4, M5, or M6 grades with thicknesses of 0.23mm to 0.35mm, coated with inorganic insulation (C-5 or C-6) to reduce eddy current losses.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Core Loss	1.2-2.5 W/kg at 1.5T, 50Hz
Core Type	EI, UI, or Toroidal
Flux Density	1.5-1.7 Tesla
Material Grade	M4-M6 Silicon Steel
Stacking Factor	0.95-0.97
Insulation Class	Class B, F, or H
Lamination Thickness	0.23-0.35mm
Operating Temperature	-40°C to 155°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 9001, IEC 61558, UL 506, DIN EN 61558

Parent Products

This component is used in the following industrial products

Isolation Barrier

A protective component in I/O interface circuitry that electrically isolates sensitive electronic components from external signals and noise.

View Product Details

Engineering Analysis

Risks & Mitigation

Core saturation leading to overheating
Interlaminar insulation failure causing short circuits
Mechanical damage to laminations affecting magnetic properties
Corrosion of core materials in humid environments

FMEA Triads

Trigger: Excessive current or voltage spikes
Failure: Core saturation and overheating
Mitigation: Implement overcurrent protection, proper voltage regulation, and thermal monitoring systems

Trigger: Poor manufacturing quality control
Failure: Interlaminar short circuits
Mitigation: Strict quality inspection of insulation coatings, proper stacking pressure control during assembly

Trigger: Environmental exposure to moisture
Failure: Core corrosion and degradation
Mitigation: Apply protective coatings, use sealed enclosures, maintain proper environmental controls

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±2% on core dimensions, ±5% on magnetic properties, insulation resistance >100MΩ at 500VDC

Test Method

Hi-pot testing (3000VAC for 1 minute), insulation resistance testing, core loss measurement per IEC 60404-2, dimensional verification per ISO 2768-m

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Isolation Transformer Core

Manufacturer profiles associated with Isolation Transformer Core.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the primary function of an isolation transformer core?

To provide a magnetic path for energy transfer while maintaining complete electrical isolation between primary and secondary circuits for safety and noise reduction.

Why are silicon steel laminations used instead of solid metal?

Laminated construction reduces eddy current losses by interrupting current paths, improving efficiency and reducing heat generation in the transformer.

What are the main differences between EI and toroidal core designs?

EI cores offer easier manufacturing and lower cost, while toroidal cores provide better magnetic efficiency, lower electromagnetic interference, and more compact designs.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Isolation Transformer Core