Dielectric Spacer: Thickness Tolerance ±0.05 mm

Component Specifications

Definition

A dielectric spacer is a specialized insulating component designed for coupling mechanisms in industrial machinery. It serves the dual function of maintaining precise mechanical separation between conductive elements and preventing electrical current flow or arcing. These components are engineered to withstand specific voltage levels, environmental conditions, and mechanical stresses while ensuring reliable operation of the coupling system. They are critical in applications where electrical isolation must be maintained without compromising mechanical integrity or alignment.

Working Principle

Dielectric spacers operate on the principle of electrical insulation through high-resistance materials that prevent current flow. They create a physical barrier between conductive coupling components, maintaining a specific gap to prevent electrical contact while allowing mechanical forces to be transmitted through the coupling. The spacer's material properties (dielectric strength, resistivity) determine its insulating capability, while its dimensional precision ensures proper mechanical alignment and load distribution.

Materials

Common materials include: ceramic (alumina, zirconia), engineered plastics (PTFE, PEEK, UHMW-PE), composite materials (fiberglass-reinforced epoxy), and specialized rubber compounds. Material selection depends on required dielectric strength (typically 10-100 kV/mm), temperature resistance (-50°C to 300°C), mechanical strength, and environmental factors.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Surface Roughness	Ra 0.8-3.2 μm
Volume Resistivity	>10^12 Ω·cm
Dielectric Strength	15-50 kV/mm
Thickness Tolerance	±0.05 mm
Compressive Strength	50-200 MPa
Operating Temperature	-40°C to 200°C

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 14644, DIN 40046, IEC 60243, ASTM D149

Parent Products

This component is used in the following industrial products

Coupling Mechanism

A mechanical interface within a high-frequency RF connector that ensures secure, repeatable, and low-loss electrical connection between mating components.

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Input/Output Couplers

Components that facilitate signal transfer between RF filters/duplexers and external circuits.

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Engineering Analysis

Risks & Mitigation

Dielectric breakdown under high voltage
Mechanical failure from excessive load
Thermal degradation at operating limits
Contamination-induced surface tracking
Dimensional instability due to moisture absorption

FMEA Triads

Trigger: Material impurities or voids in dielectric material
Failure: Reduced dielectric strength leading to electrical breakdown
Mitigation: Implement strict material quality control, use certified materials, conduct dielectric testing on each batch

Trigger: Incorrect thickness or dimensional tolerance
Failure: Improper mechanical spacing causing misalignment or excessive stress
Mitigation: Implement precision manufacturing processes, use statistical process control, conduct dimensional inspections

Trigger: Environmental contamination (dust, moisture, chemicals)
Failure: Surface tracking or reduced insulation resistance
Mitigation: Use appropriate sealing methods, implement regular cleaning protocols, select materials with good contamination resistance

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Thickness: ±0.05 mm, Flatness: 0.02 mm/mm, Parallelism: 0.01 mm

Test Method

Dielectric strength test per IEC 60243, Dimensional inspection per ISO 14644, Material verification per ASTM standards

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 Dielectric Spacer

Manufacturer profiles associated with Dielectric Spacer.

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Frequently Asked Questions

What is the primary function of a dielectric spacer in coupling mechanisms?

The primary function is to maintain electrical isolation between conductive coupling components while providing precise mechanical spacing to ensure proper alignment and load distribution.

How do I select the right dielectric spacer material?

Material selection depends on required dielectric strength, operating temperature range, mechanical load requirements, environmental conditions (moisture, chemicals), and cost considerations. Common choices include ceramics for high-temperature applications and engineered plastics for corrosion resistance.

What are common failure modes of dielectric spacers?

Common failures include dielectric breakdown due to voltage spikes, mechanical cracking from excessive load or impact, thermal degradation at high temperatures, and surface tracking from contamination buildup.

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.

Dielectric Spacer