UL3239 High-Voltage Silicone Wire

UL3239 high-voltage lead wire with tinned copper and silicone insulation, rated 10kV–50kV. Offers flexibility, heat resistance, and superior electrical insulation.


UL3239 High-Voltage Silicone Wire

High-Voltage Lead Cable | Superior Dielectric Breakdown Isolation | 10kV to 50kV Rating

UL3239 is an elite high-voltage single-conductor lead wire precisely engineered for demanding electrical applications requiring absolute dielectric safety and flexibility. Featuring a premium tinned copper stranded conductor wrapped in an extra-thick, high-purity silicone rubber insulation matrix, this cable is purpose-built to withstand severe electrical potentials ranging from 10kV up to 50kV DC depending on custom wall configurations. It provides unparalleled thermal resilience, mechanical flexibility, and aging protection within critical electronic assemblies.

Engineered for High-Potential (Hi-Pot) Enclosures & Extreme Electrical Stress:

  • Exceptional Dielectric Insulation: The specialized high-thickness silicone compound prevents corona discharge and insulation breakdown under elevated voltage profiles.
  • Premium Anti-Oxidization Conductor: Stranded tinned copper core delivers superb current continuity, prevents corrosion in high-ozone environments, and ensures smooth terminal soldering.
  • Thermal and Flexural Durability: Maintains outstanding structural pliability and elastomeric properties across a wide temperature spectrum, ensuring seamless routing inside tight high-voltage power supplies.
Voltage Rating / 額定電壓 10kV – 50kV DC
Operating Temperature / 工作溫度 150°C / 200°C
Conductor Core / 導體材質 Stranded Tinned Copper

Technical Specifications

UL3239 High-Voltage Silicone Rubber Insulated Wire

Safety Standards
UL Style 3239 Approved
Rated Voltage
3kV Continuous Insulation
Rated Temperature
-60°C to +150°C / +200°C
Material Structure
Insulation: Premium Silicone Rubber
Flame Resistance
VW-1 Flame Test Compliant

Why Choose UL3239? (Key Benefits)

High Dielectric Strength

Specially formulated thick silicone layer provides critical structural containment against high-voltage breakdown, arc tracking, and signal leakage.

Excellent Flexibility

Exceptional bend radius pliability making it perfect for tight structural layout routing in complex chassis enclosures and dynamic stress environments.

High-Strength Conductors

Utilizes advanced solid or stranded copper/nickel options to secure maximum current propagation while eliminating mechanical fatigue failure.

Severe Thermal Ranges

Guarantees unwavering physical and electrical protection from a freezing -60°C up to high-heat thresholds of +150°C / +200°C without insulation aging.


Applications

High-Voltage Dielectric Insulation Solutions
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Power & Transformers

  • High-voltage power supplies
  • Industrial transformers
  • Plasma generator wiring
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Medical Equipment

  • X-ray machine leads
  • CT scanner internal routing
  • Diagnostic imaging rigs
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EV Charging & Electronics

  • EV charging system wiring
  • High-voltage power electronics
  • Automotive high-potential grids
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Lasers & Instruments

  • Industrial laser systems
  • Test & measurement tools
  • Laboratory high-voltage rigs