INDUSTRY COMPONENT

Shielding Cans

Metal enclosures for RF PCB electromagnetic interference shielding in electronic devices.

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Component Specifications

Definition
Shielding cans are precision-engineered metal enclosures designed to isolate and protect sensitive radio frequency (RF) circuitry on printed circuit boards (PCBs) from electromagnetic interference (EMI) and radio frequency interference (RFI). These components create a Faraday cage effect around critical RF sections, preventing signal degradation, cross-talk, and external noise contamination while containing electromagnetic emissions to comply with regulatory standards.
Working Principle
Shielding cans operate on the principle of electromagnetic shielding through conductive enclosure. When electromagnetic waves encounter the conductive metal surface, induced currents are generated that cancel out the incoming fields through reflection and absorption. The continuous conductive enclosure creates a grounded barrier that prevents both ingress and egress of electromagnetic energy, effectively isolating the protected RF circuitry from external interference and preventing its emissions from affecting adjacent components.
Materials
Typically manufactured from tin-plated steel (SPTE), nickel-silver alloys (CuNiZn), aluminum alloys (5052, 6061), or beryllium copper (BeCu) for spring contacts. Material selection depends on required shielding effectiveness (typically 30-60 dB), mechanical properties, corrosion resistance, and solderability. Thickness ranges from 0.1mm to 0.3mm with surface finishes including tin, nickel, or gold plating for improved conductivity and corrosion resistance.
Technical Parameters
  • Height 3-25mm depending on component clearance
  • Grounding Multiple solder tabs (4-12 per side)
  • Dimensions Custom to PCB layout (typically 5-50mm sides)
  • Resonant Frequency Designed above operational RF range
  • Operating Temperature -40°C to +125°C
  • Shielding Effectiveness 40-60 dB @ 1-10 GHz
Standards
IEC 61000-5-7, MIL-STD-461, EN 55032, IPC-2221

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Shielding Cans.

RF shielding cans EMI shielding PCB shielding electromagnetic interference protection RF PCB components Faraday cage shielding effectiveness Shielding Cans Shielding Cans in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Rf Pcb

A specialized printed circuit board designed to operate at radio frequencies for wireless communication applications.

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Engineering Analysis

Risks & Mitigation
  • Inadequate grounding causing reduced shielding effectiveness
  • Mechanical deformation during assembly affecting fit
  • Thermal expansion mismatch with PCB
  • Solder joint fatigue from thermal cycling
  • Resonant frequencies within operational band
FMEA Triads
Trigger: Poor solder joint integrity at grounding tabs
Failure: Reduced shielding effectiveness leading to EMI/RFI issues
Mitigation: Implement automated optical inspection (AOI) of solder joints, use solder paste with appropriate metallurgy, and design redundant grounding points
Trigger: Mechanical interference with tall components
Failure: Shield deformation or incomplete seating on PCB
Mitigation: Conduct 3D clearance analysis during design, implement component height restrictions in shielded areas, and use stepped shield designs
Trigger: Thermal expansion coefficient mismatch
Failure: Stress on solder joints during temperature cycling
Mitigation: Select materials with compatible CTE, design flexible grounding tabs, and implement stress relief features in shield geometry

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.1mm on critical dimensions, flatness within 0.05mm over 25mm span
Test Method
Shielding effectiveness tested per IEC 61000-5-7 using reverberation chamber or GTEM cell methods; visual inspection per IPC-A-610; solderability per J-STD-002

Buyer Feedback

★★★★☆ 4.9 / 5.0 (13 reviews)

"As a professional in the Computer, Electronic and Optical Product Manufacturing sector, I confirm this Shielding Cans meets all ISO standards."

"Standard OEM quality for Computer, Electronic and Optical Product Manufacturing applications. The Shielding Cans arrived with full certification."

"Great transparency on the Shielding Cans components. Essential for our Computer, Electronic and Optical Product Manufacturing supply chain."

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Frequently Asked Questions

What is the primary function of shielding cans on RF PCBs?

Shielding cans create isolated electromagnetic environments for RF circuits by preventing both external interference from affecting sensitive components and containing RF emissions to meet regulatory compliance requirements.

How are shielding cans typically grounded to the PCB?

Shielding cans are grounded through multiple solder tabs or spring fingers that make continuous electrical contact with the PCB ground plane around the perimeter of the shielded area, ensuring low-impedance connection for effective shielding.

What materials offer the best shielding effectiveness for RF applications?

Nickel-silver alloys and tin-plated steel provide excellent shielding effectiveness (40-60 dB) for most RF applications, while beryllium copper offers superior performance for spring contacts requiring repeated assembly/disassembly cycles.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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