INDUSTRY COMPONENT

Magnet Assembly

Precision magnetic assembly for transducer voice coil actuation in handset audio systems

Component Specifications

Definition
A magnet assembly is a critical electromechanical component in handset transducers that generates a controlled magnetic field to drive the voice coil, converting electrical signals into mechanical vibrations for sound reproduction. It typically consists of permanent magnets, pole pieces, and a magnetic circuit structure optimized for compact audio applications.
Working Principle
Operates on electromagnetic induction principles where alternating current through the voice coil interacts with the permanent magnetic field, creating Lorentz forces that move the diaphragm to produce sound waves.
Materials
Neodymium iron boron (NdFeB) magnets, soft iron pole pieces, steel yokes, epoxy adhesives, and protective nickel-copper-nickel plating
Technical Parameters
ParameterTypical rangeNotes & selection driver
Weight0.5-2.0 g
Impedance8-32 Ω
DimensionsΦ8-15mm × 2-4mm
Resonant Frequency300-800 Hz
Magnetic Flux Density0.8-1.2 T
Operating Temperature-20°C to 80°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
IEC 60268-5, ISO 11904-1, JIS C 5502

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Magnetic field degradation over time
  • Demagnetization from high temperatures
  • Corrosion in humid environments
  • Mechanical resonance interference
  • Magnetic particle contamination
FMEA Triads
Trigger: Thermal exposure beyond material limits
Failure: Partial demagnetization reducing magnetic flux
Mitigation: Implement temperature monitoring during assembly and use thermal barrier coatings
Trigger: Improper adhesive application
Failure: Magnet detachment during vibration
Mitigation: Automated adhesive dispensing with vision inspection and shear strength testing

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
±0.05mm dimensional, ±5% magnetic flux density, ±2° angular alignment
Test Method
Gauss meter measurements, impedance testing, frequency response analysis, thermal cycling, vibration testing per IEC 60068-2-6

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 Magnet Assembly

Manufacturer profiles associated with Magnet Assembly.

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Frequently Asked Questions

What is the primary function of a magnet assembly in handset transducers?

The magnet assembly creates a stable, concentrated magnetic field that interacts with the voice coil to convert electrical audio signals into precise mechanical diaphragm movements for sound generation.

Why are neodymium magnets preferred in modern handset transducers?

Neodymium magnets provide the highest magnetic energy density available, allowing for smaller, lighter assemblies while maintaining strong magnetic fields essential for high-quality audio reproduction in compact devices.

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.

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