HEMP Filter/Tempest Filter Fabrication Services − Captor Corporation − Tipp City, Ohio
Call: 937-667-8484
Email: sales@captorcorp.com

Control line hemp/tempest filter

Control Line Hemp/Tempest Filter
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Control Line Hemp/Tempest Filter

This MIL-STD-188-125-1 and MIL-STD-188-125-2 compliant Control Line Filter was designed for use on a ground based program for protection of critical systems from HEMP (high-altitude electromagnetic pulse) conditions. In addition to meeting the MIL-STD-188-125 requirements the filter also has Tempest insertion loss performance. Although originally designed for the ground based program this filter is now used in a number of different installations requiring HEMP protection.

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Case Material: Cold-rolled-steel
Finish Electro Tin-Lead
Line Terminations: ¼" Quick Disconnect Terminal Tabs
Load Terminations: ¼" Quick Disconnect Terminal Tabs
Mounting 2 x 7/16-20UNF-2A Studs (Brass)
Weight 1.5 lbs. Maximum


Operating AC Voltage 120 VAC
Operating DC Voltage 177 VDC
Frequency 0 to 60 Hz
Operating Current 1 Amp
DWV 1000 VDC
DC Resistance 1 Ω Maximum
Insertion Loss (MIL-STD-220)
  • Passband: 1.0 dB Max. from 10 to 2.5 kHz.
  • Stopband: 100 dB Min. from 14 kHz to 10 GHz
HEMP Protection (MIL-STD-188-125-1)
  • Input Pulse (60 Ω source)
  • Output Residual (2 Ω load)
  • 2500 amps (150, 000 volts)
  • 0.1 amps maximum (0.2 volts)


Operating Temperature Range -55° C to +85° C
Storage Temperature Range -55° C to +105° C
Operating Altitude < 50,000 feet
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