> Resources>Compliance Standards>Military ESD Standards (MIL, JEDEC, STANAG)> Mil-STD-331 F1: Environmental and Performance Tests for Fuze and Fuze Components - Electrostatic Discharge (ESD)

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Mil-STD-331 F1: Environmental and Performance Tests for Fuze and Fuze Components - Electrostatic Discharge (ESD)

MIL-STD-331 personnel borne ESD testing requires two discharge networks, R/C capabilities 500pF/500Ohm and 500pF/5kOhm, along with a 30kV ESD generator. Accessories are also available to isolate the discharge tip from the main unit of the ESD generator (isolatiing the Fuze from the user), shielded environments are also available.

Scope of MIL-STD-331

This standard describes tests used by the Department of Defense (DoD) to determine the safety, reliability and performance characteristics of weapon system fuzes and fuze components at any stage in their life cycle.

History

MIL-STD-331A - Released October 15, 1976

MIL-STD-331B - Released December 1, 1989

MIL-STD-331C - Released January 5, 2005 (no significant changes to ESD)

ESD Generators for MIL-STD-331

Teseq NSG 438 ESD Simulator Gun

Features:

  • Ideal for ISO 10605
  • Programmable to 30 kV
  • Built-in ISO self-calibration procedure

Haefely ONYX 30 kV ESD Gun

Features:

  • Custom Discharge Networks
  • Suitable for ISO 10605
  • Portable (no base unit)
  • 16 Hour Battery Life

Test Parameters for MIL-STD-331

Testing to be performed in positive and negative polarities

Source of
Threat		Voltage Across
Capacitance		CapacitanceResistanceDischarge
Induction
Personnel20kV ±5%500 pF ±5%5000 Ohms<5 uH
Personnel20kV ±5%500 pF ±5%500 Ohms<5 uH
Helicopter300kV ±5%1000 pF ±10%1 max*<20 uH

*Total distributed discharge circuit resistance measured with and accuracy