Industry-Verified Manufacturing Data (2026)

Trip Solenoid

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Trip Solenoid 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 Trip Solenoid is characterized by the integration of Coil and Plunger/Armature. In industrial production environments, manufacturers listed on CNFX commonly emphasize Copper wire (coil) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

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

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Product Specifications

Technical details and manufacturing context for Trip Solenoid

Definition
A trip solenoid is an electromagnetic component within a circuit breaker trip unit that converts electrical signals into mechanical force to initiate the breaker's disconnection mechanism. It serves as the primary actuator that physically releases the latch or triggers the mechanism that opens the circuit when overcurrent, short circuit, or other fault conditions are detected by the trip unit's sensing elements.
Working Principle
When the trip unit detects a fault condition (overcurrent, short circuit, etc.), it sends an electrical signal to the trip solenoid coil. This energizes the coil, creating a magnetic field that attracts a plunger or armature. The resulting mechanical movement either directly releases the circuit breaker's latch mechanism or activates a secondary mechanism that causes the breaker contacts to open, thereby interrupting the electrical circuit.
Common Materials
Copper wire (coil), Electrical steel (core), Plastic (bobbin/housing), Spring steel (return spring)
Technical Parameters
  • Plunger stroke length and diameter (mm) Customizable
Components / BOM
  • Coil
    Generates electromagnetic field when energized
  • Plunger/Armature
    Moves under magnetic force to trigger mechanical release
  • Bobbin
    Supports and insulates the coil windings
  • Core
    Concentrates and directs magnetic flux
  • Return Spring
    Returns plunger to resting position when de-energized
Engineering Reasoning
24-48 VDC, 0.5-2.0 A coil current, 15-85°C ambient temperature
Coil insulation breakdown at 150°C, mechanical fatigue at 100,000 actuation cycles, armature sticking at >50μm particulate contamination
Design Rationale: Joule heating exceeding Curie temperature (358°C for iron) demagnetizes core, Lorentz force reduction below 0.8 N prevents armature movement
Risk Mitigation (FMEA)
Trigger Coil insulation degradation from 150°C thermal cycling
Mode: Inter-turn short circuit reducing magnetic flux density below 0.8 T
Strategy: Class H (180°C) polyimide-nomex composite insulation with 0.2 mm inter-turn spacing
Trigger Armature guide wear exceeding 50μm clearance from 100 m/s² vibration
Mode: Mechanical binding preventing 5 ms response time
Strategy: Hardened 440C stainless steel guides with 0.1 Ra surface finish and 0.5 mm PTFE lubrication reservoirs

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Trip Solenoid.

circuit breaker trip solenoid replacement electromagnetic actuator for electrical protection copper coil trip solenoid specifications industrial circuit breaker safety components high voltage trip solenoid installation

Applied To / Applications

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

Circuit Breaker Trip Unit
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 10 bar
other spec: Coil voltage tolerance: ±10% of rated voltage
temperature: -40°C to +85°C
Media Compatibility
✓ Dry air ✓ Inert gases (N2, Argon) ✓ Oil-free hydraulic fluids
Unsuitable: Corrosive or conductive fluids (e.g., saltwater, acids)
Sizing Data Required
  • Required holding force (N)
  • Supply voltage and frequency (V/Hz)
  • Response time requirement (ms)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Coil Burnout
Cause: Overvoltage, excessive duty cycles, or poor electrical connections leading to overheating and insulation breakdown.
Mechanical Binding/Sticking
Cause: Contamination (dirt, debris), corrosion, lack of lubrication, or physical damage preventing proper plunger movement.
Maintenance Indicators
  • Audible buzzing or humming from the solenoid when energized, indicating improper seating or electrical issues.
  • Visible signs of overheating such as discoloration, melting, or charring on the solenoid housing or wiring.
Engineering Tips
  • Implement regular cleaning and inspection schedules to prevent contamination buildup and ensure free mechanical movement.
  • Monitor and maintain proper voltage supply and electrical connections to prevent overvoltage conditions and ensure reliable operation.

Compliance & Manufacturing Standards

Reference Standards
ISO 4401: Hydraulic fluid power - Four-port directional control valves - Mounting surfaces ANSI/B93.5: Hydraulic fluid power - Solenoid-operated directional control valves CE Marking: Directive 2006/42/EC on machinery safety
Manufacturing Precision
  • Bore diameter: +/-0.02mm
  • Surface flatness: 0.1mm across mating surface
Quality Inspection
  • Dye penetrant test for surface defects
  • Pressure decay test for internal leakage

Factories Producing Trip Solenoid

Verified manufacturers with capability to produce this product in China

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✓ 95% Supplier Capability Match Found

S Sourcing Manager from Brazil Jan 13, 2026
★★★★★
"The Trip Solenoid we sourced perfectly fits our Electrical Equipment Manufacturing production line requirements."
Technical Specifications Verified
P Procurement Specialist from Canada Jan 10, 2026
★★★★☆
"Found 28+ suppliers for Trip Solenoid on CNFX, but this spec remains the most cost-effective. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from United States Jan 07, 2026
★★★★★
"The technical documentation for this Trip Solenoid is very thorough, especially regarding technical reliability."
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.”

12 sourcing managers are analyzing this specification now. Last inquiry for Trip Solenoid from Thailand (1h ago).

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Frequently Asked Questions

What is the primary function of a trip solenoid in electrical equipment?

A trip solenoid serves as an electromagnetic actuator that automatically triggers circuit breaker disconnection when abnormal electrical conditions like overloads or short circuits are detected, preventing equipment damage and ensuring safety.

What materials are used in trip solenoid construction and why?

Trip solenoids typically use copper wire for efficient coil winding, electrical steel for the magnetic core to minimize energy loss, plastic for bobbin/housing insulation, and spring steel for the return spring to ensure reliable reset after activation.

How do I select the right trip solenoid for my circuit breaker application?

Consider voltage rating, current capacity, response time, mounting compatibility, and environmental conditions. Consult manufacturer specifications and ensure the solenoid matches your circuit breaker's trip mechanism requirements for optimal protection.

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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