How To Choose PTFE High-Temperature Wire – A Quick High-Temp Cable Guide
Publish Time: 2025-07-11 Origin: Site
In high-temperature environments, wires are like the blood vessels of your equipment.
Selecting the wrong cable can lead to serious issues. PTFE high-temperature wire is designed for extreme heat, but not all cables are made equal. You need to choose carefully.
Why Ordinary Wires Fail in High Temperatures
When temperatures go above 70°C, common PVC or rubber wires become unsafe:
Outer jacket cracks – No protection left.
Insulation failure – Insulation resistance drops, causing electrical faults.
Conductor oxidation – Resistance rises, heat builds up, and the cycle worsens.
Toxic gas release – PVC can emit harmful gases when overheated.
This is why high-temperature wire is essential in hot environments.
What Makes a Good PTFE High Temperature Wire?
A high-quality PTFE insulated wire is not just about temperature rating. Look for these key features:
Stable performance under continuous high heat
A good PTFE wire can operate above 200°C for long periods without degrading.
Excellent insulation aging resistance
PTFE insulation resists aging, stays flexible, and keeps insulation strong over time.
No toxic emissions
PTFE does not release harmful gases under heat, unlike PVC materials.
Certified test data
Choose cables from trusted manufacturers that offer real test reports and certifications like UL, TUV, and RoHS.
What's Inside a Reliable High Temp Cable?
Top-quality heat-resistant wire has the following construction:
Advanced insulation materials: PTFE, FEP, PFA, or ETFE for -200°C to +260°C.
Tinned copper conductor: Prevents oxidation and ensures stable conductivity.
Thickened or custom jacket: Adds durability and heat resistance.
International certifications: Look for UL, TUV, RoHS to ensure product safety.
Where Are High-Temperature Cables Needed?
Some environments demand industrial high-temperature cables for safe operation:
Around industrial furnaces
Inside motors and engines
Automotive engine compartments
LED drivers and heating zones
Welding machines and heaters
Aerospace and military equipment
Only PTFE high-temperature wire or other heat-resistant cable types can survive these conditions.
Summary: Choose the Right High Temp Cable
When selecting PTFE high temp wire:
Check long-term heat stability, not just the maximum temperature.
Ask for insulation test data and safety certifications.
Don't compromise on quality to save cost-it could be dangerous.
PTFE-insulated cable is a key safety component in high-temperature systems. Choose wisely to ensure stable performance and protect your equipment.
Need custom high-temperature wire? We offer OEM / ODM PTFE cable solutions with fast sample delivery and international certification. Contact us for technical support and recommendations.
| Conductor | Insulation | Electrical Properties | Packing | |||
| Sectional Area (mm²) | Conductor Construction | Diameter (mm) | Insulation Thickness (mm) | Outer Diameter (mm) | Max. Conductor Resistance DC 20°C Ω/km | M/coil |
| 0.014 | 7X0.05 | 0.15 | 0.15 | 0.45 | 1343.00 | 500 |
| 0.035 | 7X0.08 | 0.24 | 0.15 | 0.54 | 525.00 | 500 |
| 0.05 | 7X0.10 | 0.30 | 0.15 | 0.60 | 376.20 | 500 |
| 1X0.26 | 0.26 | 0.17 | 0.60 | 376.20 | 500 | |
| 0.07 | 1X0.30 | 0.30 | 0.20 | 0.70 | 245.00 | 500 |
| 0.08 | 7X0.12 | 0.36 | 0.20 | 0.76 | 227.00 | 500 |
| 0.12 | 7X0.15 | 0.45 | 0.20 | 0.85 | 150.00 | 500 |
| 0.2 | 7X0.20 | 0.60 | 0.25 | 1.10 | 83.50 | 500 |
| 0.35 | 19X0.16 | 0.80 | 0.25 | 1.30 | 49.50 | 200 |
| 0.5 | 19X0.18 | 0.90 | 0.25 | 1.40 | 36.00 | 200 |
| 0.75 | 19X0.23 | 1.15 | 0.28 | 1.70 | 22.70 | 200 |
| 1.0 | 19X0.26 | 1.30 | 0.25 | 1.80 | 19.00 | 200 |
| 1.2 | 19X0.28 | 1.40 | 0.30 | 2.00 | 15.30 | 200 |
| 1.5 | 19X0.32 | 1.60 | 0.30 | 2.20 | 11.70 | 200 |
| 2.0 | 19X0.37 | 1.85 | 0.30 | 2.45 | 9.45 | 100 |
| 2.5 | 19X0.41 | 2.05 | 0.40 | 2.85 | 6.86 | 100 |
| 4.0 | 37X0.37 | 2.59 | 0.40 | 3.38 | 4.51 | 100 |
| 6.0 | 37X0.45 | 3.15 | 0.50 | 4.20 | 3.05 | 100 |