EMI FILTERS MIL-STD 461C to MIL-STD-461D, E, F, G

 
MDI model *3678 Hybrid EMI Filters upgrade legacy converters with internal MIL-STD-461C CE03 EMI filters to meet the latest MIL-STD-461D,E,F,G test method
requirements.
MDI introduced the industry’s first hybrid DC-DC converters featuring built-in MIL-STD-461C CE03 EMI filters. 461C CE03 is a recognized EMI specification in widespread use that uses feed-through capacitors and a current probe to measure conducted emissions on power lines in dBμA units.
More recent test methods of MIL-STD-461D,E,F, G CE102 measure conducted emissions in voltage mode using a line impedance stabilization network referenced to a 50 ohm impedance in dBμV units. Also, after adjusting for a 34dB measurement differential, CE102 uses a newer slope-adjusted limit curve as compared to CE03. In the frequency range of 100-400kHz, where many hybrid DC-DC converters operate, the newer CE102 limits can be up to 24dB lower than corresponding CE03 limits.
 
MDI offers the model *3678, a compact standalone, low attenuation solution that permits users to meet newer MIL-STD-461D,E,F,G CE102 limits with legacy converters having built-in 461C CE03 filters.
The *3678 family of filters, sized to accommodate a broad range of popular satellite, ISS/Orion, airframe and vehcle input voltage buses, incorporate a common
mode stage and two low attenuation, low resonance differential mode stages.
The resulting design achieves the necessary attenuation for CE102 compliance while minimizing the possibility of excessive input filter impedance mismatch that
might otherwise result in DC-DC converter loop instability.
A single filter can serve several DC-DC converters up to the rated maximums and two or more *3678 filters may be used in parallel to serve multiple DC-DC
converters sharing the same input bus. Please see our application notes for insertion loss curves and full technical details.

EMI BOOSTER FILTERS. MIL-STD 461C to MIL-STD-461D, E, F, G

Input Voltage 12 VDC 28 VDC 50 VDC 70 VDC 100 VDC 120 VDC 270 VDC
Hybrid EMI Filter
Meets MIL-STD-461D/E/F/G
CE102 Requirements
13678 53678 73678 83678 93678 33678 23678
 
 
MDI model *3727 MOAF (Mother Of All Filters) series meets the latest MIL-STD-461D,E,F,G CE102 test method requirements when used with most unfiltered DC – DC converters
Now, MDI offers the model *3727 MOAF series, a compact standalone, low attenuation low I²R loss solution that permits
users to meet newer MIL-STD-461D,E,F,G CE102 limits with legacy converters having built-in 461C CE03 filters. They are
particularly useful in power system applications where multiple DC-DC converters are paralleled in high load current and/or
N+1 redundant applications.
The *3727 MOAFs, sized to accommodate a broad range of popular satellite, ISS/Orion, airframe and vehicle input voltage
buses, incorporate two common mode stages and three low attenuation, low resonance differential mode stages. The
resulting design achieves the necessary attenuation for CE102 compliance while minimizing the possibility of excessive input
filter impedance mismatch that might otherwise result in DC-DC converter loop instability . Further, the design avoids use of
multi-turn wound inductors, greatly reducing internal I²R copper losses, improving efficiency and reducing power dissipation.
A single MOAF can serve multiple DC-DC converters up to the published rated maximum current.. Please see our application notes for insertion loss curves and full technical details.

EMI FILTERS MIL-STD-461D, E, F, G

Input Voltage 28 VDC 50 VDC 70 VDC 100 VDC 120 VDC 270 VDC
MOAF EMI Filter 3727 / 53727 73727 83727 93727 33727 23727
EMI Filter 3738 / 3723   3742 3742 3742 3739