Arm Fire Device (AFD)

Providing Safe Rocket Motor Ignition

Product Description

The Arm Fire Device (AFD) is an electro-mechanical device used to provide a reliable initiation of an explosive train when it is in the armed state. The AFD utilizes a Thru Bulkhead Initiator (TBI) as the output to initiate an explosive train, which in turn, provides a pressure containment barrier after functioning, providing isolation between explosive elements (i.e. rocket motor ignition) after firing.

Key Features

  • Compliant to MIL-STD-1901A
  • Use on national and global platforms
  • Directly install into solid rocket motor dome
  • Includes redundant electric detonators
  • Rapid motor ignition provided by a high speed ARM-FIRE sequence
  • Compliant to MIL-STD-1901A
  • Small-scale package configuration

When the AFD is in the SAFE position, the device is intrinsically safe from inadvertently initiating the output charge. In the SAFE position, the detonator is both electrically and mechanically isolated from any electrical inputs and explosive train outputs. An input voltage level is required to ARM the mini AFD. If the voltage is discontinued to the arming circuit before the detonator is fired, the mini AFD returns to the SAFE position.

The AFD is a significantly smaller package size then the heritage Universal AFD and features redundant detonators.


The PacSci AFD is qualified and extensively used on solid rocket motor missile systems-

Arm Fire Device Functions

The AFD is used in mission critical applications where a reliable initiation device that is intrinsically safe from inadvertent firing is needed. In addition, the mini AFD provides a complete sealing barrier between explosive elements after firing. Typical application needing these mission critical attributes include rocket motor ignition.


  • All-Fire
    Minimum 3.5 Amp (5.0 Amp recommended) for 20 milliseconds
  • No-Fire
    1 Amp/1 Watt for 5 minutes
  • Operating Temperature
    -54 °C to +71 °C
  • Arming Voltage
    28 VDC
  • Output
    Deflagration – Tailored peak output pressure performance in 10cc closed bomb
  • Insulation Resistance
    100 MΩ at 500 VDC
  • Electrostatic Discharge Immunity
    25 KV / 500 pf / 5 KΩ
  • Pre-function hermeticity
    1 x 10-6 standard cc/second of Helium
  • Applicable Specifications
    Detonator qualified to MIL-I-23659C
    Compliant with MIL-STD-1901
    Meets requirements of MIL-STD-464 (EMI) & MIL-STD-1385 (HERO)




  • Is our arm fire device qualified?

    Depending upon its use, we have arm fire device designs qualified to all pertinent mil-specifications.

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