When Milliseconds Matter™

Mini Arm Fire Device (AFD).

Ignition Safety Device | AFD | ISD

PacSci EMC / Products / Safe and Arm Devices / Mini Arm Fire Device (AFD)


Mini Arm Fire Device

How A Mini Arm Fire Device Works

The Mini 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 mini AFD utilizes a Through 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. When the mini 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 mini AFD is a significantly smaller package size then the heritage Universal AFD and features redundant detonators.

Mini Arm Fire


The mini 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.


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


  • 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)


Geometric and electrical interface features are customizable to meet customer application.

Mini Arm Fire Device Technical Envelope


Need more information or have a specific requirement you would like us to meet?
Please submit your information here or for immediate assistance call (888) 995-5143.

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