Industry-Verified Manufacturing Data (2026)

Electromagnet (Coil & Core)

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Electromagnet (Coil & Core) used in the Electrical Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Electromagnet (Coil & Core) is characterized by the integration of Coil and Core. In industrial production environments, manufacturers listed on CNFX commonly emphasize Copper (coil winding) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

An electromagnetic component consisting of a wire coil wound around a ferromagnetic core, which generates a magnetic field when electric current flows through the coil.

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Product Specifications

Technical details and manufacturing context for Electromagnet (Coil & Core)

Definition
The electromagnet (coil and core) is the actuating component within a Main Power Contactor. It converts electrical energy into mechanical force to open or close the contactor's main power contacts, enabling or interrupting high-current electrical circuits in industrial applications.
Working Principle
When a control voltage is applied to the coil terminals, current flows through the coil windings, creating a magnetic field. This magnetic field magnetizes the ferromagnetic core, generating an attractive force that moves the contactor's armature, thereby closing the main power contacts. When de-energized, a spring mechanism returns the armature to its open position.
Common Materials
Copper (coil winding), Electrical steel (core laminations), Insulation materials (coil)
Technical Parameters
  • Core dimensions (length, width, thickness) and coil bobbin dimensions (mm) Per Request
Components / BOM
  • Coil
    Conducts electrical current to generate magnetic field through electromagnetic induction
    Material: Copper wire with insulation
  • Core
    Concentrates and directs magnetic flux, providing a low-reluctance path for magnetic field
    Material: Laminated electrical steel
  • Bobbin
    Supports and insulates the coil windings from the core
    Material: Thermoplastic or thermoset plastic
Engineering Reasoning
0.5-3.0 A (current), 12-48 V (voltage), -40°C to 125°C (temperature)
Core saturation at 1.6 T magnetic flux density, insulation breakdown at 500 V/mm, Curie temperature of 770°C for iron core
Design Rationale: Core saturation reduces permeability to μ≈μ₀ (4π×10⁻⁷ H/m), insulation degradation via partial discharge at >300 Vrms, thermal demagnetization above Curie point
Risk Mitigation (FMEA)
Trigger Copper wire insulation breakdown due to partial discharge
Mode: Inter-turn short circuit causing resistance drop from 50Ω to <5Ω
Strategy: Implement triple-layer polyimide insulation with 2000 VAC withstand rating
Trigger Core lamination delamination from magnetostrictive forces
Mode: Eddy current increase by 300% causing core temperature rise to 200°C
Strategy: Use 0.35 mm silicon steel laminations with phosphate coating and interlocking design

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Electromagnet (Coil & Core).

Contactor Coil Solenoid industrial electromagnet coil and core copper wound electromagnet for manufacturing electrical steel core electromagnet component custom electromagnetic coil assembly ferromagnetic core electromagnet for equipment

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Main Power Contactor
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 10 bar (sealed designs available)
other spec: Max current density: 5-10 A/mm², Duty cycle: Continuous to intermittent
temperature: -40°C to +150°C (depending on insulation class)
Media Compatibility
✓ Dry air/nitrogen environments ✓ Non-corrosive gases ✓ Clean hydraulic fluids
Unsuitable: Conductive/abrasive slurries or corrosive chemical environments
Sizing Data Required
  • Required magnetic force (N)
  • Available power supply voltage/current (V/A)
  • Required duty cycle/operating time

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Insulation breakdown
Cause: Thermal degradation from overheating due to excessive current, voltage spikes, or poor cooling, leading to short circuits or open circuits.
Core saturation and hysteresis losses
Cause: Exceeding magnetic flux density limits or operating at high frequencies, causing excessive heat generation, reduced efficiency, and mechanical stress.
Maintenance Indicators
  • Audible humming or buzzing at abnormal frequencies or volumes
  • Visible discoloration, charring, or burning on coil windings or insulation
Engineering Tips
  • Implement thermal management with proper ventilation, heat sinks, or cooling systems to maintain operating temperature within manufacturer specifications.
  • Use voltage regulation and surge protection devices to prevent electrical transients and ensure stable power supply to the coil.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 (Quality Management Systems) IEC 60529 (Degrees of Protection Provided by Enclosures) CE Marking (EU Conformity for Electromagnetic Compatibility)
Manufacturing Precision
  • Coil Wire Diameter: +/-0.01mm
  • Core Parallelism: 0.05mm
Quality Inspection
  • Insulation Resistance Test (Megger Test)
  • Pull Force Verification Test

Factories Producing Electromagnet (Coil & Core)

Verified manufacturers with capability to produce this product in China

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✓ 93% Supplier Capability Match Found

P Procurement Specialist from Germany Feb 24, 2026
★★★★★
"Found 55+ suppliers for Electromagnet (Coil & Core) on CNFX, but this spec remains the most cost-effective."
Technical Specifications Verified
T Technical Director from Brazil Feb 21, 2026
★★★★★
"The technical documentation for this Electromagnet (Coil & Core) is very thorough, especially regarding technical reliability."
Technical Specifications Verified
P Project Engineer from Canada Feb 18, 2026
★★★★★
"Reliable performance in harsh Electrical Equipment Manufacturing environments. No issues with the Electromagnet (Coil & Core) so far."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

14 sourcing managers are analyzing this specification now. Last inquiry for Electromagnet (Coil & Core) from Brazil (52m ago).

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Frequently Asked Questions

What are the advantages of using electrical steel laminations in the electromagnet core?

Electrical steel laminations reduce eddy current losses, improve magnetic efficiency, and minimize heat generation during operation, making them ideal for industrial applications requiring sustained performance.

How does the coil winding material affect electromagnet performance?

Copper winding provides excellent electrical conductivity, allowing for higher current flow and stronger magnetic fields with lower resistance, while proper insulation ensures durability and prevents short circuits.

What factors determine the magnetic field strength of this electromagnet?

Magnetic field strength depends on the number of coil turns, current flow, core material permeability, and core geometry. Our electromagnets are engineered to optimize these variables for consistent industrial performance.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Electrical Equipment Manufacturing sector.

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