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 NUMBER OUTPUT PRESSURE (PSI) 10 CC Volume THREAD SIZE THREAD LENGTH BRIDGE WIRES MATING CONNECTOR PIGTAIL LENGTH (inches)
103377-3 925 3/8-24UNF-3A 0.233 Dual MS3116P-8-4S
103377-5 1300 3/8-24UNF-3A 0.233 Dual MS3116P-8-4S
103377-12 1600 3/8-24UNF-3A 0.153 Dual MS3116-8-4S
103377-21 1450 3/8-24UNF-3A 0.240 Dual MS25471-22 3.50
103377-23 925 3/8-24UNF-3A 0.610 Dual MS27467-T9-B98S
103377-26 725 1/2-20UNF-3A 0.400 Dual MS27467-E11F-4SA
103377-29 500 3/8-24UNF-3A 0.610 Dual MS27467-T9-B98S
103377-30 680 7/16-20UNF-3A 0.235 Dual MS27467-T9-B98S
103377-32 1600 3/8-24UNF-3A 0.153 Dual MS3116E8-4S
103377-34 650 3/8-24UNF-3A 0.153 Dual MS3116P-8-4S
103377-43 925 3/8-24UNF-3A 0.233 Dual MS3116P-8-4S
103377-46 1450 3/8-24UNF-3A 0.227 Dual 2 LEAD WIRES 10.00
103377-58 580 1/2-20UNF-3A 0.195 Dual MS3126E10-6S
103377-71 580 1/2-20UNF-3A 0.213 Dual MS24266R8B3S
103377-99 1000 3/8-24UNF-2A 0.227 Dual 2 LEAD WIRES 63.50
103377-103 1300 3/8-24UNF-3A 0.233 Dual 2 LEAD WIRES
103377-105 1600 3/8-24UNF-3A 0.153 Dual MS3116-8-4S
103377-106 1600 3/8-24UNF-3A 0.153 Dual MS3116E-8-4SW
103377-107 925 3/8-24UNF-3A 0.257 Dual MS3116-8-4S
103377-108 925 3/8-24UNF-3A 0.153 Dual MS3116-8-4S
103377-114 1400 3/8-24UNF-3A 0.230 Dual MS 3116P-8-4S
103377-115 1400 3/8-24UNF-3A LH 0.230 Dual MS 3116P-8-4SW
103377-119 390 3/8-24UNF-3A 0.233 Dual MS3116P-8-4S
103377-122 1600 3/8-24UNF-3A 0.153 Dual MS3116-8-4S
103377-129 1600 1/2-20UNF-3A 0.250 Single MS3899/26WA 98SN
103377-130 720 3/8-24UNF-3A 0.257 Dual 4 LEAD WIRES 6.15
103377-137 1000 9/16-18UNF-3A 0.233 Dual MS27467T11F04S
103377-140 500 3/8-24UNF-3A 0.257 Dual MS3116P-8-4S
103377-148 1400 3/8-24UNF-3A 0.257 Dual 4 LEAD WIRES 21.50
103377-160 925 3/8-24UNF-3A 0.257 Dual MS3116P-8-4S
103377-161 500 3/8-24UNF-3A 0.153 Dual MS3116E8-4S
103377-166 1250 1/2-20UNF-3A 0.393 Dual MS27467E11F4SA
103377-179 925 3/8-24UNF-3A 0.233 Dual MS3116P-8-4S
103377-186 1300 7/16-20UNF-2A 0.300 Single 2 LEAD WIRES 2.50
103377-187 2500 7/16-20UNF-2A 0.300 Single 2 LEAD WIRES 2.75
103377-191 650 3/8-24UNF-3A 0.217 Single MS3116P8-2S
103377-206 925 3/8-24UNF-3A 0.257 Single 4 LEAD WIRES 3.47
103377-210 925 3/8-24UNF-3A 0.223 Single 2 PIN
103377-212 1450 1/2-20UNF-3A 0.343 Dual MS27467-11F-4SA
103377-219 2500 1/2-20UNF-2A 0.383 Dual MS3116P-8-4S
103377-241 1780 3/8-24UNF-3A 0.153 Dual MS3116P-8-4S
103377-258 350 3/8-24UNF-3A 0.330 Dual MS3116P-8-4S
103377-291 2050 1/2-20UNF-2A 0.250 Dual PC06-8-4S
103377-300 650 3/8-24UNF-3A 0.330 Dual MS3116P-8-4S
103377-324 925 3/8-24UNF-3A 0.257 Single MS38999/26WA98SN
103377-334 925 3/8-24UNF-3A 0.257 Single MS3116P8-2S
103377-335 925 3/8-24UNF-3A LH 0.257 Single MS3136P8-2SW
103377-336 925 1/2-20UNF-3A 0.290 Single MS3116P8-2SX
103377-343 390 1/2-20UNF-3A 0.215 Single MS3112E-14-5P 12.00
103377-347 1400 3/8-24UNF-3A 0.257 Single 2 LEADWIRES 49.00
103377-351 925 3/8-24UNF-3A 0.257 Dual MS27467T11F04S
103377-359 1600 3/8-24UNF-3A 0.143 Dual MS3116-8-4S
103377-362 450 3/8-24UNF-3A 0.233 Single 2 LEAD WIRES 10.00
103377-371 1000 7/16-20UNJF-3A 0.220 Single D38999/26MA98PN 31.23
103377-407 10500 3/4-16UNF-2A 0.616 Dual MS3116E-8-4S
103377-415 300 3/8-24UNJF-3A LH 0.237 Single ST396G8N2SX2
103377-416 300 3/8-24UNJF-3A LH 0.203 Single MS3116P8-2S
103377-421 650 3/8-24UNJF-3A 0.205 Single MIL-C-38999
103377-422 650 3/8-24UNJF-3A 0.218 Single 2 Wire Pigtail 24.00
103377-423 1600 3/8-24-UNF-3A 0.257 Dual MS3116-8-4S
103377-424 650 3/8-24UNJF-3A 0.215 Single 2 Wire Pigtail 20.50
103377-426 1600 1/2-20UNF-3A 0.250 Single MS38999/26FA98SN
103377-429 650 3/8-24UNJF-3A 0.183 Single MS3116P8-2S
103377-430 650 1/2-20UNF-3A 0.168 Dual MS3126E106S
103377-431 1600 3/8-24UNF-3A 0.217 Single MS3116P8-2S
103377-432 925 3/8-24UNF-3A 0.233 Dual MS3116P-8-4S
103377-435 600 1/2-20UNF-3A 0.213 Dual MS24266R8B3S
103377-437 1300 3/8-24UNF-3A 0.233 Dual MS3116P-8-4S
103377-443 2300 1/2-20UNF-3A 0.380 Dual MS3116E-8-4S
103377-444 988 7/16-20UNF-3A 0.220 Single D38999/20WA98SN 15.22
103377-447 5100 1/2-20UNF-3A 0.288 Single D38999/26KA98SN
103377-449 650 3/8-24UNJF-3A 0.217 Single MS3116P8-2S
103377-450 663 3/8-24UNF-3A 0.234 Dual MS3116E8-4S
103377-500 650 3/8-24UNF-3A 0.310 Single MS3116P8-2S

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.