INDUSTRY COMPONENT

Metal Housing

EMI filter metal housing for electromagnetic interference shielding and protection

Component Specifications

Definition
A precision-engineered metal enclosure designed specifically for EMI filters, providing electromagnetic interference (EMI) shielding, physical protection, heat dissipation, and structural support for filter components. It serves as both a protective case and an integral part of the filter's electromagnetic performance by creating a Faraday cage effect.
Working Principle
Acts as a conductive barrier that reflects and absorbs electromagnetic interference through the skin effect, preventing unwanted electromagnetic emissions from escaping (emission control) and protecting internal components from external interference (immunity). The housing's continuous conductive surface creates a low-impedance path to ground, effectively containing electromagnetic fields within the filter assembly.
Materials
Galvanized steel (SGCC), aluminum alloy (6061/6063), stainless steel (304/316), with surface treatments including zinc plating, powder coating, or anodizing for corrosion resistance and enhanced conductivity
Technical Parameters
ParameterTypical rangeNotes & selection driver
IP RatingIP54/IP65
Material Thickness1.0-2.0 mm
Surface Resistance<0.1 Ω/sq
Grounding ConnectionM6 threaded insert with star washer
Operating Temperature-40°C to +85°C
Shielding Effectiveness≥40 dB @ 30 MHz - 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
IEC 61000-6-4, IEC 61000-6-2, MIL-STD-461, EN 55032, UL 94, ISO 12944

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Inadequate shielding due to poor seam design
  • Corrosion in harsh environments
  • Grounding failure leading to EMI leakage
  • Thermal management issues
  • Mechanical deformation affecting seal integrity
FMEA Triads
Trigger: Improper seam design or assembly
Failure: EMI leakage through gaps
Mitigation: Implement EMI gaskets, conductive seals, or welded seams; ensure proper overlap design
Trigger: Insufficient corrosion protection
Failure: Reduced conductivity and structural integrity
Mitigation: Apply appropriate surface treatments (zinc plating, powder coating); select corrosion-resistant materials for specific environments
Trigger: Poor thermal design
Failure: Overheating of filter components
Mitigation: Incorporate ventilation slots with EMI mesh, heat sinks, or thermal interface materials; ensure adequate surface area

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
±0.5 mm for critical dimensions, flatness within 0.2 mm over 100 mm
Test Method
Shielding effectiveness per MIL-STD-285 or IEEE 299, salt spray testing per ASTM B117, IP rating testing per IEC 60529

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 Metal Housing

7 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

HLC Metal Parts Ltd
Dongguan, Guangdong, CN
IATF16949 ISO13485
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “CNC Machined Metal Housing Block”
View source page ↗ hlc-metalparts.com · checked 2026-08-26
Shenzhen HSJ Metal Fabrication Co., Ltd.
Shenzhen, Guangdong, CN
Also makes: Panel Enclosure
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Player Metal Housing”
View source page ↗ hsjfabrication.com · checked 2026-08-26
Glowyard
Guangzhou, Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “stamped metal housing”
View source page ↗ glowyard.com · checked 2026-09-16
Qingdao Rongda Machinery Technology Co., Ltd.
Qingdao, Shandong, CN
Also makes: Dump Truck
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Milled metal housing”
View source page ↗ rongdametal.com · checked 2026-09-09
Shanghai Lanbao Sensing Technology Co., Ltd.
Shanghai, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Full Metal Housing”
View source page ↗ cnlanbaosensor.com · checked 2026-09-12
Shenzhen Signal Electronics Co.,LTD.
Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “H3A Metal Housing”
View source page ↗ signal-connector.com · checked 2026-09-01
SMI Casting Limited
Shenzhen, Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Metal Housing”
View source page ↗ smicasting.com · checked 2026-09-08

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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Frequently Asked Questions

What is the primary function of an EMI filter metal housing?

The primary function is to provide electromagnetic shielding by containing EMI emissions from the filter components and protecting them from external interference, while also offering physical protection and heat dissipation.

Which materials are commonly used for EMI filter housings?

Common materials include galvanized steel for cost-effectiveness and good shielding, aluminum for lightweight applications with good thermal conductivity, and stainless steel for corrosive environments.

How does the housing affect EMI filter performance?

Proper housing design ensures continuous conductivity and proper grounding, which are critical for achieving required shielding effectiveness. Poor housing can compromise EMI performance by creating leakage paths.

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.

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