UL3239 Silicone High Voltage Wire – 150°C / 200°C, 3kV–10kV Rated Cable
UL3239 wire is a UL-certified, high-voltage single-conductor cable insulated with flexible silicone rubber, designed for internal wiring in environments requiring elevated temperature and voltage endurance. It supports voltage ratings from 3kV to 10kV, and is available in 150°C or 200°C temperature classes, making it ideal for power supplies, EV charging modules, medical equipment, and other high-stress electrical systems.
The stranded tinned copper conductor provides both flexibility and excellent conductivity, while the silicone insulation delivers outstanding resistance to heat, cold, ozone, and corona discharge. UL3239 also meets UL VW-1 flame test requirements, ensuring flame retardancy and system safety.
Key Features of UL3239 Wire
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Rated voltage: 3,000V to 10,000V
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Temperature rating: 150°C or 200°C
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Insulation: High-flex silicone rubber (halogen-free)
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Conductor: Stranded tinned copper
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Flame rating: UL VW-1 compliant
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Excellent flexibility, corona resistance, and arc protection
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RoHS & REACH compliant
UL3239 Wire – 20°C Conductor Resistance Table
| AWG | 20°C Resistance (Ω/km) |
|---|---|
| 10 | 3.90 |
| 12 | 5.94 |
| 14 | 9.45 |
| 16 | 14.8 |
| 18 | 19.0 |
| 20 | 29.8 |
| 22 | 48.5 |
| 24 | 77.4 |
Values based on typical stranded tinned copper construction.
Common Applications
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High-voltage power supplies and inverter modules
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EV charging systems and battery packs
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X-ray, laser, and medical diagnostic equipment
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Telecom and signal transmission systems
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Test benches, burn-in units, and industrial heaters
🔗 Related Wire Styles
🌐 Certification Reference
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UL Style Page – UL3239 Listing at iq.ul.com
Need technical support or a quote for custom UL3239 lengths, insulation colors, or bundling? Contact us today—we’ll match the best solution for your high-voltage application.
