These wires are designed for critical circuit applications where wires must operate in extremely harsh environments, under vibration, and with direct flame exposure.
Key Features
Firezone wires for aircraft engine applications are designed to operate continuously at 260 °C
Firezone applications are designed to operate for a minimum of 15 minutes at up to 2000 °F (1093 °C), including in a direct flame
Firezone qualification must pass BSS 7324 and M25038 Shake and Bake Test
Shake and Bake Test Description:
Wire must withstand a flame temperature of 2,000° ± 50°F for 15 minutes
After the flame has been stabilized, the wire is vibrated 30 times per second, with the rack having a maximum total excursion (overall movement) of approximately .06 inches (1.52 mm)
After 15 minutes, the lowest insulation resistance is measured
No insulation can flake or fall off during the flame exposure
Firezone Requirements v. Results
Requirements
Results
MIL-W-25038
50 Ω
10 kΩ
Product Construction
MIL-W-25038/1 Construction Details
Jacket
PTFE-coated fiberglass braid and finisher
Insulation
Composite inorganic dielectric
Conductor
27% nickel-coated copper ranging from 22 – 4/0 AWG
MIL-W-25038/3 Construction Details
Jacket
Fused high-performance PTFE tape (also available with Seamless Wrap PTFE tape)
