Shielding: Temperature Range -40°C to +105°C

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

Parameter	Typical range	Notes & selection driver
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

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

Standards

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

Parent Products

This component is used in the following industrial products

Signal Cable

Electrical cable for transmitting temperature measurement signals from a sensor probe to monitoring equipment.

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Antenna Interface

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

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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

Typical Suppliers & Equivalents

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

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Shielding

Manufacturer profiles associated with Shielding.

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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.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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