Editorial Technical Reference

Electromagnet (Coil & Core)

This page explains how Electromagnet (Coil & Core) is classified within Electrical Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

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. The component comprises a copper wire coil wound around a laminated electrical steel core, with insulation materials on the coil. When a control voltage is applied to the coil terminals, current flows through the windings, creating a magnetic field that magnetizes the core. This generates 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. The component is available with a rated voltage of 24 V DC, coil resistance from 10 to 50 Ω at 20°C (tolerance ±10%), power consumption from 5 to 20 W for continuous duty (higher for intermittent duty), holding force from 10 to 500 N at rated voltage and 0 mm air gap, stroke length from 5 to 50 mm, response time from 10 to 100 ms to reach 90% of full force, operating temperature from -20 to 70°C (derate above 50°C), insulation class F (155°C) per IEC 60085 (class H available), protection rating from IP54 to IP65 per IEC 60529, core material DT4C per GB/T 6983 (other grades on request), coil wire material QZ-2/130 per GB/T 6109, and weight from 0.5 to 10 kg depending on size and force rating. These values are directory reference ranges and must be confirmed for the actual model and application. Verify model-specific values and standards with the legal manufacturer or supplier.

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

Parameter	Typical range	Notes & selection driver
Rated Voltage	24 V DC	Standard coil voltage; other voltages available on request.
Coil Resistance	10–50 Ω	At 20°C; tolerance ±10%.
Power Consumption	5–20 W	Continuous duty; higher for intermittent duty.
Holding Force	10–500 N	At rated voltage and 0 mm air gap.
Stroke Length	5–50 mm	Maximum linear travel of the armature.
Response Time	10–100 ms	Time to reach 90% of full force at rated voltage.
Operating Temperature	-20–70 °C	Ambient; derate above 50°C.
Insulation Class	F	Class F (155°C) standard; class H available.IEC 60085
Protection Rating	IP54–IP65	IP65 for dust-tight and water-jet protection.IEC 60529
Core Material	DT4C	Pure iron for high permeability; other grades on request.GB/T 6983
Coil Wire Material	QZ-2/130	Polyester enameled copper wire, class 130.GB/T 6109
Weight	0.5–10 kg	Depends on size and force rating.

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

Components / BOM

Coil
Conducts electrical current to generate magnetic field through electromagnetic induction

Material: Copper wire with insulation
Core Part
Concentrates and directs magnetic flux, providing a low-reluctance path for magnetic field

Material: Laminated electrical steel
Bobbin Part
Supports and insulates the coil windings from the core

Material: Thermoplastic or thermoset plastic

Industry Taxonomies & Aliases

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

Applied To / Applications

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

Main Power Contactor

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Manufacturers of Electromagnet (Coil & Core)

Manufacturer profiles associated with Electromagnet (Coil & Core).

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Frequently Asked Questions

What is the typical rated voltage for this electromagnet?

The directory lists a standard rated voltage of 24 V DC, but other voltages may be available on request. Always confirm the exact voltage rating for your specific model with the manufacturer or supplier.

What is the holding force range?

The holding force is specified as 10 to 500 N at rated voltage and 0 mm air gap. The actual force depends on the model and application, so verify with the manufacturer.

What insulation class is standard?

The standard insulation class is F (155°C) per IEC 60085, with class H available as an option. Confirm the insulation class for your specific model.

What protection rating does the component have?

The protection rating ranges from IP54 to IP65 per IEC 60529, providing dust-tight and water-jet protection. Verify the exact rating for your model.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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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)

Electromagnet (Coil & Core)

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards