MIL-STD-464: Electromagnetic Environmental Effects Requirements for Systems

History

Originally released in 1997, MIL-STD-464B was scrapped and replaced with MIL-STD-464C in 2010. Aside from the General Requirements for meeting the standard, the electrostatic immunity portion is unaltered.

Applicability

The selected verification method must be appropriate for the type of structural material being used and the particular type of control being verified. Relatively poor electrical connections are effective as discharge paths for electrostatic charges. Therefore, inspection would normally be appropriate for verifying that metallic and conductive composite MIL-STD-464 APPENDIX 75 structural members are adequately bonded provided that electrically conductive hardware and finishes are being used. For dielectric surfaces which are treated with conductive finishes, testing of the surface resistivity and electrical contact to a conductive path would be normally be more appropriate.

For space and launch vehicles, ESD requirements are verified by a pulsed discharge at one per second for 30 seconds at a distance of 30 cm to exposed face of subsystems and equipment. This test is then repeated using a direct discharge from the test electrode to each top corner of the equipment under test. The discharge network is 100 pF in series with 1500 ohms.

A5.7.3 Ordnance subsystems. Ordnance subsystems shall not be inadvertently initiated or dudded by a 25 kilovolt electrostatic discharge caused by personnel handling. Compliance shall be verified by test (such as MIL-STD-331), discharging a 500 picofarad capacitor through a 500 ohm resistor to the ordnance subsystem (such as electrical interfaces, enclosures, and handling points.

Popular ESD Simulators for Mil-STD-464

Haefely ONYX 30 kV ESD Generator
	Features: Mobile & Portable - No Base Unit Air- & Contact- Discharge to 30 kV 16 Hour Battery Life Meet Mil-STD-464, RTCA/DO-160 Section 25 and more...

Teseq NSG 437 Automotive ESD Gun
	Features: Suitable for ISO 10605 Compliance Programmable to 30 kV Activity Log Easy Change Discharge Networks Advanced Voltage-Hold Feature