Hot Bridge Wire | HBW

Hot Bridge Wire

Hot Bridge Wire devices (HBW) are used to provide high reliable critical functions across many industries. An HBW converts electrical energy into chemical energy providing a gas or heat output. An electrical input is applied to the HBW, heating a small wire, called a bridge wire, 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.

 

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FUNCTIONS/APPLCIATIONS

Functions

A Hot Bridge Wire refers 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.

Applications

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

PERFORMANCE CHARACTERISTICS

  • 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 PacSci EMC’s Space Initiator
    AS high as +400°F for PacSci EMC’s GreenDet™
  • 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: Electro-explosive 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: Electro-explosive Subsystem Safety Requirements and Test Methods for Space Systems

103377 FAMILY OF INITIATORS

PART NUMBEROUTPUT PRESSURE (PSI) 10 CC VolumeTHREAD SIZETHREAD LENGTHBRIDGE WIRESMATING CONNECTORPIGTAIL LENGTH (inches)
103377-39253/8-24UNF-3A0.233DualMS3116P-8-4S
103377-513003/8-24UNF-3A0.233DualMS3116P-8-4S
103377-1216003/8-24UNF-3A0.153DualMS3116-8-4S
103377-2114503/8-24UNF-3A0.240DualMS25471-223.50
103377-239253/8-24UNF-3A0.610DualMS27467-T9-B98S
103377-267251/2-20UNF-3A0.400DualMS27467-E11F-4SA
103377-295003/8-24UNF-3A0.610DualMS27467-T9-B98S
103377-306807/16-20UNF-3A0.235DualMS27467-T9-B98S
103377-3216003/8-24UNF-3A0.153DualMS3116E8-4S
103377-346503/8-24UNF-3A0.153DualMS3116P-8-4S
103377-439253/8-24UNF-3A0.233DualMS3116P-8-4S
103377-4614503/8-24UNF-3A0.227Dual2 LEAD WIRES10.00
103377-585801/2-20UNF-3A0.195DualMS3126E10-6S
103377-715801/2-20UNF-3A0.213DualMS24266R8B3S
103377-9910003/8-24UNF-2A0.227Dual2 LEAD WIRES63.50
103377-10313003/8-24UNF-3A0.233Dual2 LEAD WIRES
103377-10516003/8-24UNF-3A0.153DualMS3116-8-4S
103377-10616003/8-24UNF-3A0.153DualMS3116E-8-4SW
103377-1079253/8-24UNF-3A0.257DualMS3116-8-4S
103377-1089253/8-24UNF-3A0.153DualMS3116-8-4S
103377-11414003/8-24UNF-3A0.230DualMS 3116P-8-4S
103377-11514003/8-24UNF-3A LH0.230DualMS 3116P-8-4SW
103377-1193903/8-24UNF-3A0.233DualMS3116P-8-4S
103377-12216003/8-24UNF-3A0.153DualMS3116-8-4S
103377-12916001/2-20UNF-3A0.250SingleMS3899/26WA 98SN
103377-1307203/8-24UNF-3A0.257Dual4 LEAD WIRES6.15
103377-13710009/16-18UNF-3A0.233DualMS27467T11F04S
103377-1405003/8-24UNF-3A0.257DualMS3116P-8-4S
103377-14814003/8-24UNF-3A0.257Dual4 LEAD WIRES21.50
103377-1609253/8-24UNF-3A0.257DualMS3116P-8-4S
103377-1615003/8-24UNF-3A0.153DualMS3116E8-4S
103377-16612501/2-20UNF-3A0.393DualMS27467E11F4SA
103377-1799253/8-24UNF-3A0.233DualMS3116P-8-4S
103377-18613007/16-20UNF-2A0.300Single2 LEAD WIRES2.50
103377-18725007/16-20UNF-2A0.300Single2 LEAD WIRES2.75
103377-1916503/8-24UNF-3A0.217SingleMS3116P8-2S
103377-2069253/8-24UNF-3A0.257Single4 LEAD WIRES3.47
103377-2109253/8-24UNF-3A0.223Single2 PIN
103377-21214501/2-20UNF-3A0.343DualMS27467-11F-4SA
103377-21925001/2-20UNF-2A0.383DualMS3116P-8-4S
103377-24117803/8-24UNF-3A0.153DualMS3116P-8-4S
103377-2583503/8-24UNF-3A0.330DualMS3116P-8-4S
103377-29120501/2-20UNF-2A0.250DualPC06-8-4S
103377-3006503/8-24UNF-3A0.330DualMS3116P-8-4S
103377-3249253/8-24UNF-3A0.257SingleMS38999/26WA98SN
103377-3349253/8-24UNF-3A0.257SingleMS3116P8-2S
103377-3359253/8-24UNF-3A LH0.257SingleMS3136P8-2SW
103377-3369251/2-20UNF-3A0.290SingleMS3116P8-2SX
103377-3433901/2-20UNF-3A0.215SingleMS3112E-14-5P12.00
103377-34714003/8-24UNF-3A0.257Single2 LEADWIRES49.00
103377-3519253/8-24UNF-3A0.257DualMS27467T11F04S
103377-35916003/8-24UNF-3A0.143DualMS3116-8-4S
103377-3624503/8-24UNF-3A0.233Single2 LEAD WIRES10.00
103377-37110007/16-20UNJF-3A0.220SingleD38999/26MA98PN31.23
103377-407105003/4-16UNF-2A0.616DualMS3116E-8-4S
103377-4153003/8-24UNJF-3A LH0.237SingleST396G8N2SX2
103377-4163003/8-24UNJF-3A LH0.203SingleMS3116P8-2S
103377-4216503/8-24UNJF-3A0.205SingleMIL-C-38999
103377-4226503/8-24UNJF-3A0.218Single2 Wire Pigtail24.00
103377-42316003/8-24-UNF-3A0.257DualMS3116-8-4S
103377-4246503/8-24UNJF-3A0.215Single2 Wire Pigtail20.50
103377-42616001/2-20UNF-3A0.250SingleMS38999/26FA98SN
103377-4296503/8-24UNJF-3A0.183SingleMS3116P8-2S
103377-4306501/2-20UNF-3A0.168DualMS3126E106S
103377-43116003/8-24UNF-3A0.217SingleMS3116P8-2S
103377-4329253/8-24UNF-3A0.233DualMS3116P-8-4S
103377-4356001/2-20UNF-3A0.213DualMS24266R8B3S
103377-43713003/8-24UNF-3A0.233DualMS3116P-8-4S
103377-44323001/2-20UNF-3A0.380DualMS3116E-8-4S
103377-4449887/16-20UNF-3A0.220SingleD38999/20WA98SN15.22
103377-44751001/2-20UNF-3A0.288SingleD38999/26KA98SN
103377-4496503/8-24UNJF-3A0.217SingleMS3116P8-2S
103377-4506633/8-24UNF-3A0.234DualMS3116E8-4S
103377-5006503/8-24UNF-3A0.310SingleMS3116P8-2S

ENVELOPE/INTERFACE DESIGN

Many features, such as the connector, thread, length, single or dual bridgewire, output, and other features can be customized to meet customer applications.
PacSci EMC 10337-500 Envelope