Seal/Insulator: Temperature Range -40°C to +200°C

Component Specifications

Definition

A specialized component designed to simultaneously provide electrical insulation between conductive elements and create an environmental seal in feedthrough filter applications. It prevents electrical leakage, arcing, and contamination ingress while maintaining signal integrity in high-frequency or high-voltage systems.

Working Principle

Operates by creating both a dielectric barrier between electrical conductors and a physical seal against environmental factors. The insulating material prevents current flow between adjacent conductive parts, while the sealing function blocks moisture, dust, gases, or other contaminants from entering sensitive areas.

Materials

Typically composed of ceramic (alumina, steatite), engineered plastics (PTFE, PEEK, polyimide), elastomers (silicone, fluorosilicone, EPDM), or composite materials with specific dielectric strength ≥15 kV/mm and temperature resistance from -40°C to +200°C.

Technical Parameters

Parameter	Typical range	Notes & selection driver
IP Rating	IP67 or higher
Compression Set	≤20%
Temperature Range	-40°C to +200°C
Volume Resistivity	≥10^14 Ω·cm
Dielectric Strength	≥15 kV/mm
Insulation Resistance	≥10^12 Ω

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 60601-1, UL 94, DIN 40050

Parent Products

This component is used in the following industrial products

Feedthrough Filter

An electromagnetic interference (EMI) filter designed to pass signals or power through a shielding enclosure while suppressing unwanted frequencies.

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Engineering Analysis

Risks & Mitigation

Dielectric breakdown under high voltage
Compression set leading to seal failure
Chemical degradation in harsh environments
Thermal expansion mismatch
Creep under constant pressure

FMEA Triads

Trigger: Material degradation due to chemical exposure
Failure: Loss of sealing capability leading to contamination ingress
Mitigation: Use chemically resistant materials like PTFE or fluorosilicone; implement regular inspection schedules

Trigger: Excessive compression force during installation
Failure: Permanent deformation and reduced dielectric properties
Mitigation: Specify proper torque values; use calibrated installation tools; train personnel on correct installation procedures

Trigger: Thermal cycling beyond material limits
Failure: Cracking or loss of adhesion between sealing surfaces
Mitigation: Select materials with appropriate thermal expansion coefficients; design for thermal stress relief; implement temperature monitoring

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1 mm for critical dimensions, dielectric strength tolerance ±5% of rated value

Test Method

Dielectric withstand test per IEC 60112, compression set test per ASTM D395, leakage current measurement, environmental sealing test per IP 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

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 Seal/Insulator

Manufacturer profiles associated with Seal/Insulator.

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Frequently Asked Questions

What is the primary function of a seal/insulator in feedthrough filters?

It serves dual purposes: providing electrical insulation between conductive elements to prevent short circuits and creating an environmental seal to protect against contamination, moisture, and other external factors.

How do I select the right material for a seal/insulator?

Consider operating temperature, chemical exposure, dielectric requirements, compression set characteristics, and compatibility with mating surfaces. Common materials include ceramics for high-temperature applications and engineered plastics for chemical resistance.

What maintenance is required for seal/insulator components?

Regular inspection for cracks, deformation, or contamination buildup; periodic replacement based on compression set measurements; and verification of dielectric properties during preventive maintenance cycles.

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.

Seal/Insulator