Can I contact factories directly on CNFX?

CNFX is an open directory. Each factory profile provides direct contact information.

Bobbin/Core Component – Electrical Equipment Manufacturing

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

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

Standards

ISO 9001, IEC 60076, DIN 42500

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Bobbin/Core.

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

Interchangeable Parts

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.

Buyer Feedback

★★★★☆ 4.5 / 5.0 (13 reviews)

"Found 45+ suppliers for Bobbin/Core on CNFX, but this spec remains the most cost-effective."

"The technical documentation for this Bobbin/Core is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Electrical Equipment Manufacturing environments. No issues with the Bobbin/Core so far."

Related Components

Alignment System

Precision alignment system for industrial wireless power transfer modules ensuring optimal energy coupling efficiency.

Winding Spindle

A precision rotating shaft in transformer winding machines that holds and rotates the coil form during wire winding operations.

Arc Plates

Arc plates are metallic plates within circuit breaker arc chutes that split and cool electrical arcs during interruption to ensure safe circuit disconnection.

Insulating Housing

Insulating housing for circuit breaker arc chutes that provides electrical isolation and thermal protection.

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.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Bobbin/Core