Bobbin/Core: Inductance Range 1 μH to 10 H

Component Specifications

Definition

A bobbin/core is a critical component in electromagnetic coil assemblies, typically consisting of a cylindrical or toroidal structure that serves multiple functions: it provides mechanical support for copper or aluminum wire windings, ensures proper insulation between winding layers, and in the case of magnetic cores (like ferrite or laminated steel), creates a controlled magnetic flux path to enhance inductance and efficiency. The design prevents wire movement, reduces eddy current losses, and maintains thermal stability under operational loads.

Working Principle

The bobbin/core operates by physically holding and insulating conductive wire windings to form a coil. When an electric current flows through the windings, it generates a magnetic field; if the core is magnetic (e.g., ferrite), it concentrates and guides this magnetic flux, increasing the coil's inductance and energy storage capacity. This enables functions like energy transfer, filtering, or signal processing in electrical circuits.

Materials

Common materials include thermoplastics (e.g., PET, PBT, nylon) for insulating bobbins, and magnetic materials like ferrite, powdered iron, or laminated silicon steel for cores. Specifications may involve temperature ratings (e.g., UL94 V-0 for flammability), dielectric strength, and magnetic permeability (e.g., μr for cores).

Technical Parameters

Parameter	Typical range	Notes & selection driver
Dimensions	Varies by application (e.g., OD: 10-100 mm, height: 5-50 mm)
Inductance Range	1 μH to 10 H
Core Material Type	Ferrite, laminated steel, or air core
Temperature Rating	-40°C to 150°C
Insulation Resistance	>100 MΩ

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 60076, DIN 42500

Parent Products

This component is used in the following industrial products

Electromagnetic Coil

An electrical component that generates a magnetic field when current flows through it, used to control magnetorheological fluid viscosity in dampers.

View Product Details

Engineering Analysis

Risks & Mitigation

Overheating due to poor thermal dissipation
Insulation breakdown from voltage spikes
Mechanical deformation under stress
Core saturation leading to efficiency loss

FMEA Triads

Trigger: Inadequate material thermal rating
Failure: Overheating and insulation degradation
Mitigation: Use high-temperature resistant materials (e.g., PBT) and implement thermal management designs

Trigger: Improper winding tension
Failure: Wire damage or short circuits
Mitigation: Apply controlled winding processes and quality checks

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Dimensional tolerances typically ±0.1 mm; electrical tolerances as per design specs (e.g., inductance ±10%)

Test Method

Testing includes inductance measurement (LCR meter), dielectric withstand voltage test, thermal cycling, and mechanical stress tests per IEC standards.

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 Bobbin/Core

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Hefei Mycoil Technology Co.,LTD

Hefei, Anhui, CN

Also makes: High-Frequency Transformer, Current Transformer, Balun Transformer and 6 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “EF16 SMD Bobbin Core”
View source page ↗ mycoiltech.com · checked 2026-09-17

View profile Send enquiry

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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 difference between a bobbin and a core in electromagnetic coils?

A bobbin is primarily an insulating structure that holds wire windings, while a core is a magnetic material (e.g., ferrite) that enhances inductance by guiding magnetic flux; they are often integrated into a single component.

How do material choices affect bobbin/core performance?

Material selection impacts thermal stability, electrical insulation, and magnetic properties. For example, thermoplastics provide durability and insulation, while ferrite cores offer high permeability for efficient energy transfer in high-frequency applications.

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.

Bobbin/Core