INDUSTRY COMPONENT

Plunger/Armature

Plunger/Armature is the moving core component in trip solenoids that converts electrical energy into linear mechanical motion for circuit interruption.

View Specifications

Component Specifications

Definition
The plunger/armature is a precision-machined ferromagnetic component that serves as the movable core within a trip solenoid assembly. When energized by an electrical coil, it generates electromagnetic force that moves linearly against a spring mechanism, physically actuating the trip mechanism to open electrical contacts. This component is critical for rapid, reliable circuit interruption in protection devices.
Working Principle
Operates on electromagnetic induction principles: when current flows through the solenoid coil, it creates a magnetic field that attracts the ferromagnetic plunger/armature, causing linear motion. This mechanical displacement is transferred to the trip mechanism, which opens electrical contacts to interrupt current flow. De-energizing the coil allows a return spring to reset the plunger/armature to its original position.
Materials
Typically made from low-carbon steel (AISI 1010/1018), silicon steel, or soft magnetic alloys (e.g., Permendur) with high magnetic permeability and low coercivity. Surface treatments include zinc plating, nickel coating, or phosphate coating for corrosion resistance.
Technical Parameters
  • Response Time <20 ms
  • Stroke Length 2-15 mm
  • Operating Force 5-50 N
  • Dimensional Tolerance ±0.05 mm
  • Electrical Insulation Class B (130°C)
  • Operating Temperature -40°C to +85°C
Standards
ISO 4400, DIN 43650, IEC 60947-1

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Plunger/Armature.

solenoid plunger electromagnetic armature trip mechanism component circuit breaker part linear actuator core magnetic plunger protection relay component Plunger/Armature Plunger/Armature in Electrical Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Trip Solenoid

Electromagnetic actuator that triggers circuit breaker disconnection when abnormal conditions are detected.

View Product Details

Control Solenoid Valve

An electrically operated valve that controls fluid flow in automated systems.

View Product Details

Solenoid Valve Assembly

An electromechanically operated valve assembly that controls the flow of ingredients in a manifold system.

View Product Details

Engineering Analysis

Risks & Mitigation
  • Magnetic saturation reducing force output
  • Mechanical binding due to contamination
  • Corrosion affecting movement
  • Fatigue failure from cyclic loading
  • Inconsistent response due to wear
FMEA Triads
Trigger: Material contamination or improper lubrication
Failure: Mechanical binding/sticking
Mitigation: Implement cleanroom assembly, use specified lubricants, apply protective coatings
Trigger: Corrosive environment exposure
Failure: Reduced magnetic properties and increased friction
Mitigation: Apply corrosion-resistant coatings, use stainless steel variants, implement environmental sealing
Trigger: Cyclic fatigue from frequent operation
Failure: Fracture or permanent deformation
Mitigation: Use fatigue-resistant materials, implement duty cycle monitoring, design with safety factors

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.1 mm for critical dimensions, ±2% for magnetic properties
Test Method
Electromagnetic force testing per IEC 60947-1, dimensional verification with CMM, material certification to ASTM A848

Buyer Feedback

★★★★☆ 4.7 / 5.0 (35 reviews)

"Testing the Plunger/Armature now; the technical reliability results are within 1% of the laboratory datasheet."

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

"As a professional in the Electrical Equipment Manufacturing sector, I confirm this Plunger/Armature meets all ISO standards."

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 plunger and armature in solenoid applications?

In trip solenoids, 'plunger' typically refers to the moving core in linear motion applications, while 'armature' is more general but often used interchangeably. Both perform the same function of converting electromagnetic force to mechanical motion.

How does plunger/armature wear affect trip solenoid performance?

Wear can increase friction, reduce response speed, and cause inconsistent trip timing. Regular inspection for surface scoring, corrosion, or material fatigue is essential for maintaining reliable operation.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Get Quote for Plunger/Armature

Permanent Magnets Polarization Key