When Milliseconds Matter™

Hydrogen Burn Off Igniters.

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Hydrogen Burn Off Igniters


How Hydrogen Burn Off Igniters Work

Hydrogen Burn Off (HBO) Igniter utilizes an electrical input stimulus that ignites an Electro-Explosive Device (EED) which in turn ignites a propellant grain. The propellant grain is designed to sustain a controlled burn for a specified amount of time (minimum of 22 seconds), As the propellant grain burns, it produces hot pyrotechnic particles which are propelled and exited through a nozzle in a cone pattern over a required distance (minimum of 15 feet). Propellant burn time duration and throw distance can be customized to meet specific customer application needs.

What Our HBO Igniters Can Do

HBO Igniters provide output of hot pyrotechnic particles used to prevent the accumulation of hydrogen gas on the launch pad during the starting process of Liquid Hydrogen/Liquid Oxygen (LOX) rocket engines. HBO igniters can be used where ejection of hot pyrotechnic particles will provide a means to solve other applications.

Where PacSci EMC HBO Igniters Can Be Found

PacSci EMC HBO Igniters are qualified and currently used to support the safe launching of various U.S. and International space vehicles.

  • NASA’s Space Shuttle
  • United Launch Alliance (ULA) Delta IV Rocket
  • Mitsubishi Heavy Industries (MHI) H2 Rocket

For product specific questions or to obtain data sheets, please email aircraftmil@psemc.com or for immediate assistance call (888) 995-5015.

Performance Characteristic Performance Level
Output Provide pyrotechnic sparks of at least +1,500°F
Throw Eject hot particles a minimum distance of 15 feet, and a cone angle of approximately 20°
Duration (Burn Time) Minimum 22 seconds
Operational Temperature -20°F to +160°F
Hermetic Sealing 1 x 10-5 cc/sec of helium with one atmosphere differential pressure
All-fire Stimulus 4.0 amperes with a 20 millisecond pulse
No-fire 1.0 ampere / 1.0 watt for 5.0 minute
Insulation Resistance Greater than 2.0 megaohms at 500 volts direct current
Applicable Specifications Motor Igniter qualified to MIL-STD-1576
Initiator qualified to MIL-I-23659

Additional questions? Please email aircraftmil@psemc.com or for immediate assistance call (888) 995-5015.


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