UL21458 mPPE Cable – 105°C 300V Multi-Conductor Wire for Internal Wiring
UL21458 cable is a multi-conductor wire certified under UL standards, engineered for internal wiring applications in electronic and electrical equipment. It utilizes modified polyphenylene ether (mPPE) insulation, providing a lightweight, halogen-free, and flame-resistant solution rated for 105°C and 300V.
Well-suited for dry indoor use, this cable offers excellent performance in space-limited assemblies such as signal circuits, automation units, power control modules, and appliances. Its insulation supports UL VW-1 flame test compliance, and the wire construction meets RoHS and REACH environmental safety requirements.
Key Characteristics
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UL-recognized cable with durable mPPE insulation
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Rated for 105°C temperature and 300V voltage
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Conductors made of stranded tinned copper
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Flame-retardant per UL VW-1 standard
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Lightweight, halogen-free, RoHS/REACH compliant
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Available in 2–100 parallel-laid cores for multi-conductor configurations
Electrical Resistance – AWG at 20°C
| AWG | Resistance (Ω/km) |
|---|---|
| 30 | 381 |
| 28 | 239 |
| 26 | 150 |
| 24 | 94.2 |
| 22 | 59.4 |
| 20 | 36.7 |
| 18 | 23.2 |
| 16 | 14.6 |
Measured under standard conditions using tinned copper conductors.
Where UL21458 Is Used
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Internal harnessing in electronic appliances and control boxes
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Signal and power distribution in relay panels, power supplies, and EV control boards
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Suitable for dry, indoor environments that demand flame resistance and low environmental impact
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Often used in automation, consumer electronics, and light industrial systems
UL21458 provides a dependable, space-efficient wiring solution that balances flame performance, mechanical flexibility, and environmental compliance. It’s a go-to option for OEMs needing compact multi-core cables with a clean material profile.
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