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Shielding Component – Computer, Electronic and Optical Product Manufacturing

Component Specifications

Definition

A conductive layer or braid surrounding signal cable conductors that provides electromagnetic shielding by creating a Faraday cage effect. This component attenuates electromagnetic interference (EMI) and radio frequency interference (RFI) through reflection and absorption mechanisms, ensuring clean signal transmission in electrically noisy industrial environments. The shielding effectiveness is measured in decibels (dB) and depends on material conductivity, coverage percentage, and grounding implementation.

Working Principle

Operates on electromagnetic shielding principles where conductive materials create a barrier that reflects and absorbs electromagnetic waves. When properly grounded, the shielding provides a low-impedance path for interference currents to flow to ground, preventing them from coupling with internal signal conductors. The effectiveness follows the skin effect principle at higher frequencies, where current flows primarily on the surface of the conductive material.

Materials

Copper (bare or tinned), aluminum foil, copper-clad aluminum, nickel-plated copper, silver-plated copper, stainless steel, conductive polymers. Common configurations: braided wire (85-95% coverage), spiral wrap (70-85% coverage), foil laminate (100% coverage with drain wire).

Technical Parameters

Braid Angle 30-45 degrees
DC Resistance 5-50 mΩ/m
Wire Diameter 0.08-0.20 mm
Grounding Method Drain wire or 360-degree termination
Temperature Range -40°C to +105°C
Coverage Percentage 70-100%
Shielding Effectiveness 40-100 dB @ 30 MHz to 1 GHz

Standards

ISO 6722, DIN 72551, IEC 61196, UL 1277, MIL-DTL-17

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Shielding.

Parent Products

This component is used in the following industrial products

Signal Cable

Electrical cable designed to transmit temperature measurement signals from a sensor probe to monitoring equipment.

View Product Details

Antenna Interface

Electrical and mechanical connection point between the antenna and GPS receiver module

View Product Details

Engineering Analysis

Risks & Mitigation

Ground loops causing interference
Shield damage during installation
Corrosion reducing conductivity
Improper termination reducing effectiveness
EMI coupling through shield gaps

FMEA Triads

Trigger: Poor shield termination or grounding
Failure: Increased EMI/RFI interference in signal transmission
Mitigation: Implement 360-degree grounding clamps, use proper termination tools, follow manufacturer's installation guidelines

Trigger: Mechanical damage during cable routing
Failure: Reduced shielding coverage and effectiveness
Mitigation: Use protective conduits, maintain minimum bend radius, implement strain relief at connections

Trigger: Corrosion in humid environments
Failure: Increased shield resistance and reduced effectiveness
Mitigation: Use tinned or plated copper, apply protective coatings, ensure proper environmental sealing

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

Shielding coverage: ±5% of specified value, DC resistance: ±10% of nominal value, Effectiveness: -3 dB maximum deviation from specified values

Test Method

IEEE 299 for shielding effectiveness, IEC 61196 for cable testing, MIL-STD-461 for EMI compliance, Time Domain Reflectometry (TDR) for continuity testing

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation

4/5

Manufacturing capability

4/5

Inspection readiness

5/5

Supplier transparency

3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the difference between braided and foil shielding?

Braided shielding provides better flexibility and mechanical protection with 70-95% coverage, ideal for frequent movement. Foil shielding offers 100% coverage with better high-frequency performance but less durability. Many industrial cables use combination shields (foil + braid) for optimal performance.

How does proper grounding affect shielding effectiveness?

Proper 360-degree grounding termination is critical. Improper grounding creates antenna effects that can amplify interference. The shield must be connected to ground at both ends for low-frequency interference and at one end for high-frequency applications to prevent ground loops.

What factors determine shielding effectiveness?

Material conductivity, coverage percentage, thickness, frequency range, grounding method, and cable construction. Higher conductivity materials (copper, silver) provide better shielding. Effectiveness decreases with frequency increase due to skin effect limitations.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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.

Shielding