Mounting Plate / Chassis: Flatness Tolerance ≤0.5mm/m²

Q: What is the primary function of a mounting plate in a power line filter panel?

To provide secure mechanical mounting for filter components while ensuring proper electrical grounding and EMI/RFI containment through conductive enclosure design.

Q: How do you ensure proper grounding with these chassis?

Through dedicated grounding studs with star washers that penetrate surface coatings, maintaining <0.1Ω resistance to panel ground as per IEC 61439 requirements.

Component Specifications

Definition

A rigid metallic chassis or mounting plate designed to securely house and support power line filter components (such as capacitors, inductors, and chokes) within an electrical panel. It provides structural integrity, proper component alignment, electrical grounding, and thermal management while isolating electromagnetic interference from sensitive equipment.

Working Principle

Provides mechanical support and electrical grounding for filter components. The chassis acts as a Faraday cage to contain electromagnetic interference (EMI) and radio frequency interference (RFI), while the mounting plate ensures precise component positioning for optimal electrical performance and heat dissipation.

Materials

Cold-rolled steel (CRS) with zinc plating (5-8μm) or aluminum alloy (6061-T6) with anodized coating (15-25μm). Thickness: 1.5-3.0mm. Surface resistivity: <0.1Ω/sq for grounding.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Dimensions	Standard panel sizes: 19" rack (482.6mm width) or custom
Mounting Holes	M4 or M5 threaded inserts, 10-12mm spacing
Surface Finish	RAL 9005 (black) powder coating, 60-80μm
Weight Capacity	5-15kg distributed load
Grounding Points	Minimum 2× M6 studs with star washers
Flatness Tolerance	≤0.5mm/m²

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 12944-5, DIN 43694, IEC 61439-1

Parent Products

This component is used in the following industrial products

Power Line Filter Panel

A panel integrating power line filters to suppress EMI entering or exiting an EMI shielding test chamber via power cables.

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Engineering Analysis

Risks & Mitigation

Inadequate EMI shielding due to poor surface contact
Corrosion in humid environments
Mechanical resonance at specific frequencies

FMEA Triads

Trigger: Improper surface preparation before coating
Failure: Reduced grounding effectiveness leading to EMI leakage
Mitigation: Implement abrasive blasting (SA 2.5) and conductivity testing per ISO 12944

Trigger: Vibration from adjacent equipment
Failure: Loosened fasteners causing component misalignment
Mitigation: Use thread-locking compounds and torque-controlled assembly (4-6Nm for M5)

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.2mm for mounting hole positions, ±1° for perpendicularity

Test Method

Vibration testing per IEC 60068-2-6 (5-500Hz, 1g), salt spray testing per ISO 9227 (500 hours)

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

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Manufacturers of Mounting Plate / Chassis

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Frequently Asked Questions

What is the primary function of a mounting plate in a power line filter panel?