High-Temperature Mica Cable – Product Detail Page
High-Temperature Mica Cable is a specialized fire-resistant cable that utilizes high-purity mica tape as the core insulation material, combined with fiberglass braiding or other protective layers. With a melting point of up to 1375°C, synthetic mica tape enables continuous operation at temperatures ranging from 600°C to 1000°C, making it an ideal solution for power transmission in extreme thermal environments.
The cable’s unique layered silicate structure effectively blocks electric arcs and carbonization paths, ensuring stable insulation performance even during fire exposure or prolonged high-temperature operation. Widely used across metallurgy, petrochemical, aerospace, power generation, and new energy vehicle industries, this product delivers unmatched safety and reliability where conventional cables would fail.
Cable Structure Diagram
Typical cable structure (from inside to outside):
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Conductor – Bare copper, nickel-plated copper, or pure nickel (solid or stranded)
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Mica Tape Insulation Layer – High-purity synthetic or phlogopite mica tape wrapped around conductor
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Fiberglass Braiding – High-temperature finished glass fiber braid for mechanical protection
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Optional Outer Sheath – Silicone varnish, PTFE, or special resin coating for additional protection
Technical Specifications
| Parameter |
Specification |
| Rated Temperature |
350°C – 1000°C (grade dependent) |
| Continuous Operating Temperature |
-60°C to 500°C / 600°C – 1000°C |
| Rated Voltage |
300V – 600V (standard); up to 1000V with multi-layer insulation |
| Conductor Material |
Bare copper, nickel-plated copper, pure nickel |
| Conductor Sizes |
0.25mm² – 125mm² (AWG 26 – 4/0 AWG) |
| Core Count |
1 – 12 cores |
| Insulation Material |
High-purity mica tape + glass fiber |
| Jacket/Braid Material |
Glass fiber braid (silicone varnish or PTFE treated) |
| Dielectric Strength |
AC1000V, leakage current < 0.25mA (3m) |
| Insulation Resistance |
DC 500V, ≥100MΩ (3m minimum) |
| Fire Resistance |
750°C – 1000°C for ≥90 minutes, fuse wire intact |
| Conductor Resistance |
≤0.5Ω/M/3m |
| Flex Test |
300G, 90° each side, 6 cycles/min, >3000 cycles |
| Standards |
GB/T 19666-2019, UL 5108, IEC 60331, BS 6387 |
| Color Options |
White, blue, red, black, brown, yellow, gree |
Application Fields
Metallurgy & Steel Mills
Used in furnaces, smelting equipment, and high-temperature process zones where ambient temperatures regularly exceed 500°C. The cable’s fire-resistant properties ensure uninterrupted power transmission in the most extreme industrial environments.
Petrochemical & Oil Refineries
Deployed in refineries, oil platforms, and natural gas processing facilities where fire safety is paramount. Mica cables provide reliable performance in areas with high fire risk and corrosive atmospheres.
Power Generation
Essential for power plants, including thermal, nuclear, and renewable energy facilities. Used in turbine control systems, generator wiring, and emergency power circuits.
Aerospace & Defense
Applied in engine compartments, control systems, and ignition systems. High-temperature mica cables have been successfully used in rocket ignition systems, withstanding 1800°C for 45 seconds during launch sequences.
New Energy Vehicles
Critical for battery pack wiring, motor drives, and thermal management systems in electric and hybrid vehicles. The cable’s lightweight construction and thermal stability make it ideal for automotive applications.
Fire Safety Systems
Installed in firefighting equipment, emergency lighting, evacuation systems, and life-safety circuits. Circuit integrity during fire exposure ensures critical systems remain operational when needed most.
Household & Commercial Appliances
Used in internal wiring of ovens, water heaters, furnaces, lighting fixtures, and other high-temperature appliances.
Marine & Offshore
Well-suited for ships and offshore platforms due to the cable’s ability to withstand extreme conditions and corrosive saltwater environments
FAQ
Q1: What temperature can high-temperature mica cables withstand?
Different grades offer varying temperature capabilities. Standard types operate at 350°C–500°C using phlogopite or standard synthetic mica with fiberglass braiding. High-temperature types reach 600°C–1000°C using high-performance synthetic mica with sintering processes. Some specialized applications can withstand instantaneous temperatures up to 1800°C for short durations.
Q2: How do I select the right temperature grade?
Match the cable’s rated temperature to your application’s continuous operating temperature plus a 20% safety margin. Consider both steady-state temperatures and instantaneous peak temperatures. For example, household ovens (200–300°C) require 300°C-rated cables, while metallurgical furnaces or EV battery packs (400°C+) require 500°C or higher grades.
Q3: What is the difference between synthetic mica and natural mica?
Synthetic mica (fluorophlogopite) offers superior thermal stability with a melting point up to 1375°C and better flexibility, making it suitable for applications requiring bending and movement. Natural mica (phlogopite or muscovite) has lower temperature resistance (750°C–830°C) and less flexibility but is more economical for fixed installations.
Q4: Can mica cables be used for voltages above 600V?
Single-layer mica tape insulation is typically suitable for voltages below 600V. For applications above 1kV, a multi-layer or composite insulation structure is required to ensure safe performance. Always consult the manufacturer’s specifications for high-voltage applications.
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