UL3331
UL3331 single-conductor wire with XLPE insulation, UL-certified for 125°C/600V. Offers thermal stability, flame resistance, and reliable performance for demanding wiring needs.
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.
Feature Highlights
Conductor: Solid or stranded, bare or tinned copper
AWG Range: Available in wire sizes from 30 AWG to 2 AWG
Insulation: XLPE, average thickness ≥ 0.76 mm (30 mils), low shrinkage and abrasion-resistant
Temperature Rating: Continuous operation up to 125°C
Voltage Rating: 600V
Flame Resistance: UL Horizontal Flame Test compliant
Halogen-Free Option: Available for RoHS-compliant and eco-sensitive applications
Certifications: UL Recognized AWM 3331, RoHS & REACH compliant
Jacket Color: Customizable
Performance Benefits
Stable performance under heat and electrical load
Excellent resistance to moisture, oil, and physical abrasion
Flexible enough for routing through complex harness paths
Suitable for use in compact enclosures and confined spaces
Extended product life under cyclic temperature stress and vibration
Typical Application
Internal wiring for industrial machinery and control systems
Medical and laboratory equipment where thermal stability is required
EV modules and battery management systems (BMS)
Telecom base stations, power inverters, and switch-mode power supplies
Appliance wiring inside HVAC, robotics, and automation panels
External Technical Reference
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