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Hot Bridgewire | HBW | Exploding Bridgewire
When Milliseconds Matter™

Hot Bridgewire, EEDs & Initiators.

Hot Wire Bridge | Squib

PacSci EMC / Products / Pyrotechnic Initiators / Hot Bridgewire, EEDs & Initiators



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How Our Hot Bridgewire Electro-Explosive Devices Work

Hot Bridgewire Electro-Explosive Devices (EED) are used to provide high reliable critical functions across many industries. An EED converts electrical energy into chemical energy providing a gas or heat output. An electrical input is applied to the EED, heating a small wire, called a bridgewire, which is in contact with the pyrotechnic. The wire quickly heats to the auto-ignition temperature of the pyrotechnic or explosive material. The pyrotechnic material then reacts providing gas pressure and/or flame. The heat and flame can be used to ignite other explosives or propellants while the gas pressure can be used to perform work.

Frequently used names are: initiator, igniter, ignitor, detonator, squib, cartridge, or pressure cartridge.


EEDs refer to a broad family of devices that are utilized to accomplish:

  • ignition
  • initiation
  • release
  • severance
  • fracture
  • cutting
  • jettison
  • valving
  • switching
  • time delay
  • actuation

A few applications include: aircraft seat ejection, aircraft fire extinguishing, oil well perforating, demolition, launch vehicles, satellites, missiles and munitions, parachute release and electrical circuit breakers.


PacSci EMC has designed, manufactured, and qualified hundreds of EEDs for use on multiple platforms for commercial and military aircraft, missiles and munitions, space and launch vehicles, and deep underground oil field applications. PacSci EMC is currently in production of an initiator line that was qualified in 1976 and has been in continuous production since.


  • All-Fire, Typical

    3.5 amps at 0.999 reliability at 95% Confidence level

  • No-Fire, Typical

    1.0 amps / 1.0 watt, 0.001 probability to fire at 95% lower confidence

  • Operating Temperature Ranges

    As low as -420°F for PSEMC’s Space Initiator
    AS high as +400°F for PSEMC’s GreenDetTM

  • Ordnance Output

    Deflagration – Tailored peak output pressure performance
    Detonation – Tailored dent depth in steel or Al dent block

  • Electrostatic Discharge, Typical

    25 kVDC from a 500 pF capacitor with a 5000 ohm series resistor

  • Applicable Standards

    MIL-DTL-23659 Initiators, Electric, General Design For; Appendix A: In-Line Initiator Certification

    MIL-STD-1512: Electroexplosive Subsystems, Electrically Initiated, Design Requirements and Test Methods

    DOD-E-83758: Explosive Ordnance for Space Vehicles, General Specification for

    RCC-319: Range Commanders Council Flight Termination Systems Commonality Standard

    MIL-STD-1576: Electroexplosive Subsystem Safety Requirements and Test Methods for Space Systems


Many features, such as the connector, thread, length, single or dual bridgewire, output, and other features can be customized to meet customer applications.




Need more information or have a specific requirement you would like us to meet?
Email space@psemc.com or call (888) 995-5659.

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