UL3644 High Temp Silicone Cable | 1000V LSZH Flexible Tinned Copper Wire
UL 3644 Silicone Insulated Hook-Up Wire – High Temperature & High Voltage Performance
UL 3644 silicone insulated wire is engineered for high-temperature, high-voltage internal wiring applications where safety, flexibility, and durability are critical. Designed with stranded tinned copper conductors and advanced LSZH silicone rubber insulation, this wire ensures stable performance in demanding environments such as industrial equipment, appliances, and aerospace systems.
With a temperature rating up to 200°C and a voltage rating of 1000VAC, UL 3644 wire provides superior electrical reliability and thermal resistance. Its braidless silicone insulation delivers excellent flexibility, allowing easy installation in compact or complex wiring layouts.
For larger conductor sizes (8 AWG to 4/0 AWG), an optional paper wrap reinforcement enhances structural integrity and mechanical protection, making it ideal for heavy-duty applications requiring additional durability.
Key Advantages
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Excellent thermal stability for continuous high-temperature operation
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High dielectric strength for 1000V applications
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LSZH insulation ensures low smoke and zero halogen emissions
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Strong resistance to abrasion, aging, and environmental stress
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Flexible design for easy routing and installation
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Wide conductor range for multiple industrial applications
Typical Applications
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Internal wiring of electrical appliances
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Energy storage systems (ESS / BESS)
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Industrial control panels and machinery
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Aerospace and military equipment
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High-power electrical devices
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Comparison: UL 3644 vs UL 3132 vs UL 3641
| Feature | UL 3644 | UL 3132 | UL 3641 |
|---|---|---|---|
| Voltage Rating | 1000V | 600V | 1000V |
| Temperature Rating | 150°C / 200°C | 150°C | 150°C / 200°C |
| Insulation Material | Silicone (LSZH, braidless) | Silicone rubber | Silicone rubber |
| Conductor | Stranded tinned copper | Stranded tinned copper | Stranded tinned copper |
| Flexibility | Excellent | Excellent | Excellent |
| Mechanical Strength | High (paper wrap for large sizes) | Medium | Medium |
| Application Level | High voltage & harsh environments | General high-temp wiring | High-temp + high-voltage wiring |
| Typical Use | Industrial, aerospace, appliances | Internal appliance wiring | Appliances, lighting, electronics |
Key Differences Explained
UL 3644 vs UL 3132
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UL 3644 supports higher voltage (1000V vs 600V)
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Better suited for energy storage, industrial power systems
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UL 3132 is more commonly used in standard appliance internal wiring
Conclusion: UL 3644 is the better choice for high-voltage + high-temperature environments
UL 3644 vs UL 3641
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Both support 1000V, but UL 3644 offers enhanced mechanical durability
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UL 3644 is preferred in heavy-duty or abrasion-prone environments
Conclusion: UL 3644 is ideal for more demanding industrial and aerospace applications
