UL3331 XLPE Insulated Wire – 125°C / 600V Hook-Up Wire for Demanding Internal Wiring Applications
UL3331 is a high-performance single-conductor wire certified under UL 758 (AWM Style 3331), featuring durable cross-linked polyethylene (XLPE) insulation. Designed to operate in environments up to 125°C and 600V, it delivers outstanding thermal stability, mechanical strength, and electrical reliability in tight spaces or thermally demanding systems.
With excellent flame retardancy and insulation integrity, UL3331 is a trusted solution for OEMs and engineers requiring compact, safe, and long-life wiring in mission-critical equipment.
Technical Highlights
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Conductor: Solid or stranded, bare or tinned copper
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AWG Range: Available in wire sizes from 30 AWG to 2 AWG
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Insulation: XLPE, average thickness ≥ 0.76 mm (30 mils), low shrinkage and abrasion-resistant
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Temperature Rating: Continuous operation up to 125°C
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Voltage Rating: 600V
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Flame Resistance: UL Horizontal Flame Test compliant
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Halogen-Free Option: Available for RoHS-compliant and eco-sensitive applications
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Certifications: UL Recognized AWM 3331, RoHS & REACH compliant
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Jacket Color: Customizable
Performance Benefits
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Stable performance under heat and electrical load
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Excellent resistance to moisture, oil, and physical abrasion
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Flexible enough for routing through complex harness paths
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Suitable for use in compact enclosures and confined spaces
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Extended product life under cyclic temperature stress and vibration
Typical Application Scenarios
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Internal wiring for industrial machinery and control systems
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Medical and laboratory equipment where thermal stability is required
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EV modules and battery management systems (BMS)
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Telecom base stations, power inverters, and switch-mode power supplies
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Appliance wiring inside HVAC, robotics, and automation panels
Conductor Resistance Reference (20°C, Ω/km)
| AWG | Resistance (Ω/km) |
|---|---|
| 30 | 381 |
| 26 | 150 |
| 24 | 94.2 |
| 22 | 59.4 |
| 20 | 36.7 |
| 18 | 23.2 |
| 16 | 14.6 |
| 14 | 9.26 |
| 12 | 5.83 |
| 10 | 3.65 |
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🌐 External Technical Reference
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