Fire Ex Cartridges | Squib Cartridges | PacSci EMC
When Milliseconds Matter™

Fire Ex Cartridges | Squib Cartridges.

Fire Extinguishing | Aircraft Fire Safety Systems

PacSci EMC / Products / Detonators / Fire Ex Cartridges | Squib Cartridges


Fire Ex Cartridges Squibs

On Command. When Commanded

For Commercial and Military Aircraft Fire Extinguishing Safety Systems.

Fire Ex or Squib cartridges are utilized to allow the flow of fire suppressant from a storage bottle. The engines, auxiliary power units and in some cases gear boxes on helicopters incorporate extensive measures for fire protection. The cartridge or squib is an integral part of commercial and military fire extinguisher systems. Cartridges/squibs come in a number of configurations and output depending upon the customer requirements. The configuration is driven by the manufacturers of the different fire suppression systems. In many cases, the same cartridge is utilized on several different aircraft because they use the same fire suppression storage bottle. This simplifies logistics and data tracking if done.

Our engineering heritage for designing and manufacturing squibs dates back over four decades. Our units are qualified to MIL-I-23659 and MIL-D-21025 for Type III release service. Platform use and heritage include the following:

AH-1 Cobra AH-64 Apache F/A-18 Hornet F-15 Eagle
UH-1Y KC-135 F-22 B-2

Operating Temperature Range
-65 0F (-54 0C) to +200 0F (+93.330C)

Leak Rate
1×10-5 cc/sec. Helium or 1×10-6 cc/sec. Helium

No-Fire Current Range
0.5 amp/0.25 watt for 1 minute
1 amp 1 watt for 5 minutes (depending upon qualification standard utilized)

All-Fire Current
3.0 Amps minimum or 3.5 Amp minimum

Ignition Time
Normally < 20 milliseconds maximum
(at 3.0 Amps Minimum)

Pressure or detonation
Depending upon closure/diaphragm material & thickness

Electrostatic Discharge
25,000 + 500 volts discharged from a 500 + 25pico-farad capacitor
between shorted pins-to-case through a 5,000 ohm resistor in series

Bridgewire Resistance
1 + 0.1 Ohms through 1.15 + 0.25 ohms

Insulation Resistance
> 2 Megohms @ 500 VDC

PSD= + 1.5 dB from 10-500Hz, + 3 dB from 500 to 2000 Hz
Overall GRMS = + 10%, duration + 5%
Vibration shall be applied along each of three (3) mutually orthogonal axes, at ambient
-65°F and 300° F for 40 minutes per axis at each temperature


13083-5 Squib

Fire Ex Cartridges Squibs Envelope



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