INDUSTRY COMPONENT

Insulating Substrate

Insulating substrate for precision current shunt resistors providing electrical isolation and thermal management.

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Component Specifications

Definition
An insulating substrate is a critical component in precision current shunt resistors, serving as the foundational layer that electrically isolates the resistive element from the mounting surface while providing mechanical support and efficient heat dissipation. It ensures accurate current measurement by preventing leakage currents and maintaining stable thermal conditions.
Working Principle
The insulating substrate operates by providing high electrical resistivity to block current flow between the resistive element and ground, while offering low thermal resistance to transfer heat away from the resistor. This dual functionality maintains measurement accuracy and prevents thermal runaway.
Materials
Alumina (Al2O3) ceramic (96-99.5% purity), Aluminum Nitride (AlN) for high-power applications, or specialty polymer composites. Surface finish: polished or metallized for bonding.
Technical Parameters
  • CTE 6-8 ppm/°C
  • Surface Roughness <0.4 μm Ra
  • Dielectric Strength >15 kV/mm
  • Thermal Conductivity 20-170 W/m·K
  • Operating Temperature -55°C to +300°C
Standards
ISO 2878, DIN 40685, IEC 60384

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Insulating Substrate.

insulating substrate current shunt resistor electrical isolation thermal management ceramic substrate precision measurement Insulating Substrate in Electrical Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Precision Current Shunt Resistor

Low-resistance precision resistor for accurate current measurement in electrical circuits.

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High-Voltage Resistor Network

A specialized resistor network designed to operate safely and accurately at high voltage levels within measurement circuits.

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Tamper Detection Mesh

A security mesh integrated into key storage systems to detect physical tampering attempts.

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Engineering Analysis

Risks & Mitigation
  • Dielectric breakdown under high voltage
  • Thermal stress cracking
  • Delamination of metallized layers
  • Contamination affecting insulation properties
FMEA Triads
Trigger: Micro-cracks in ceramic substrate
Failure: Electrical short circuit
Mitigation: Implement ultrasonic inspection and proof testing at 2x operating voltage
Trigger: Thermal expansion mismatch
Failure: Mechanical fracture under thermal cycling
Mitigation: Use substrates with CTE matching resistive element and employ compliant bonding materials

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.5% on thickness, ±1% on flatness
Test Method
Dielectric withstand test per IEC 60112, Thermal cycling per MIL-STD-202

Buyer Feedback

★★★★☆ 4.8 / 5.0 (23 reviews)

"The Insulating Substrate we sourced perfectly fits our Electrical Equipment Manufacturing production line requirements."

"Found 19+ suppliers for Insulating Substrate on CNFX, but this spec remains the most cost-effective."

"The technical documentation for this Insulating Substrate is very thorough, especially regarding technical reliability."

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Frequently Asked Questions

What is the primary function of an insulating substrate in current shunt resistors?

The primary function is to provide electrical isolation between the resistive element and mounting surface while facilitating efficient heat dissipation to maintain measurement accuracy.

How does material choice affect insulating substrate performance?

Material choice determines thermal conductivity, dielectric strength, and thermal expansion characteristics. Alumina offers good balance, while Aluminum Nitride provides superior thermal performance for high-power applications.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Insulating Housing Insulation Body