Military EMI Filters

These Filters are available in two series

DMC-FC 00-W: 100dB attenuation from 14 kHz to 10 GHz measured per MIL-STD-220A full load

DMC-FC 00-X: 100dB attenuation from 14 kHz to 10 GHz measured per MIL-STD-220A full load. SPECIAL: Measured from 14 kHz to 20 MHz under full load condition with extended range buffer network

HIGHLIGHTS: High reliability. Special design and construction developed for secure communication areas, tempest shielded rooms. Designed for many years of continuous fail free service. All filters are field replaceable.

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SERIES DMC-FC 00-X

PART NO.	CURRENT (AMPERES)	DIMENSIONS (INCHES)								CONDUIT ENTRY DIA.	APPROX. WEIGHT (LBS.)
PART NO.	CURRENT (AMPERES)	A	B	C	D	E	F	G	H	CONDUIT ENTRY DIA.	APPROX. WEIGHT (LBS.)
DMC-FC00·X·2×5	2×5	12 ¼	29	5	14 ¼	17	2	2	5.75	7/8	75
DMC-FC00-X-3×5	3×5	20	29	5	22	17	2	2	5.75	7/8	110
DMC-FC00-X-4×5	4×5	20	29	5	22	17	2	2	5.75	7/8	130
DMC-FC00-X-2×30	2×30	12 ¼	37	5	14 ¼	25	3	2	4.25	1 3/8	135
DMC-FC00-X-3×30	3×30	20	37	5	22	25	3	2	4.25	1 3/8	165
DMC-FC00-X-4×30	4×30	20	37	5	22	25	3	2	4.25	1 3/8	200
DMC-FC00-X-2×60	2×60	15 ½	48	11	17 ½	36	3	5	9.38	1 ¾	230
DMC-FC00-X-3×60	3×60	25	48	11	27	36	3	5	9.38	1 ¾	320
DMC-FC00-X-4×60	4×60	25	48	11	27	36	3	5	9.38	1 ¾	380
DMC-FC00-X-2×100	2×100	16 ½	60	11	18 ½	48	4	5	9.38	2	290
DMC-FC00-X-3×100	3×100	25	60	11	27	48	4	5	9.38	2	400
DMC-FC00-X-4×100	4×100	25	60	11	27	48	4	5	9.38	2	450
DMC-FC00-X-2×200	2×200	17 ½	60	25	19 ½	48	4	5	10	3	600
DMC-FC00-X-3×200	3×200	25	60	25	27	48	4	5	10	3	750
DMC-FC00-X-4×200	4×200	25	60	25	27	48	4	5	10	3	900
DMC-FC00-X-4×300	4×300	50	60	25	54	48	4	5	10	3	900

SERIES DMC- FC 00-W (FC 00-W has one piece cover)

PART NO.	CURRENT (AMPERES)	DIMENSIONS (INCHES)								CONDUIT ENTRY DIA.	APPROX. WEIGHT (LBS.)
PART NO.	CURRENT (AMPERES)	A	B	C	D	E	F	G	H	CONDUIT ENTRY DIA.	APPROX. WEIGHT (LBS.)
DMC-FC00·W·2×5	2×5	12 ¼	29	5	14 ¼	17	2	2	5.75	7/8	75
DMC-FC00-W-3×5	3×5	20	29	5	22	17	2	2	5.75	7/8	105
DMC-FC00-W-4×5	4×5	20	29	5	22	17	2	2	5.75	7/8	125
DMC-FC00-W-2×30	2×30	12 ¼	37	5	14 ¼	25	3	2	7.75	1 3/8	80
DMC-FC00-W-3×30	3×30	20	37	5	22	25	3	2	7.75	1 3/8	130
DMC-FC00-W-4×30	4×30	20	37	5	22	25	3	2	7.75	1 3/8	165
DMC-FC00-W-2×60	2×60	15 ½	37	5	18 ½	25	3	2	7.75	1 ¾	100
DMC-FC00-W-3×60	3×60	20	37	5	27	25	3	2	7.75	1 ¾	140
DMC-FC00-W-4×60	4×60	20	37	5	27	25	3	2	7.75	1 ¾	175
DMC-FC00-W-2×100	2×100	16 ½	37	11	18 ½	25	5	5	10.00	2	170
DMC-FC00-W-3×100	3×100	25	37	11	27	25	5	5	10.00	2	250
DMC-FC00-W-4×100	4×100	25	37	11	27	25	5	5	10.00	2	300
DMC-FC00-W-2×200	2×200	17 ½	40	17	19 ½	28	5	5	10.00	3	200
DMC-FC00-W-3×200	3×200	25	40	17	27	28	5	5	10.00	3	350
DMC-FC00-W-4×200	4×200	25	40	17	27	28	5	5	10.00	3	425
DMC-FC00-W-4×300	4×300	50	40	17	54	28	5	5	10.00	3	425

These models are available with NT suffix denoting grounded neutral terminal in case.

All filters above are rated for 0-60 Hz line frequencies. 400 Hz power filters are available. Voltage rating: 0-277 VAC line-to-neutral or 0-480 VAC line-to-line, 600 VDC max Single filter is available in cabinet for above series.

Specifications

GENERAL

The filter herein described shall be designed for filtering of radio frequency interference and to meet the requirements of Military Specifications MIL-F-15733, where applicable. These filters may be used with other electrical devices to enable the devices to meet the requirements of MIL-I-26600, MIL-I-16910, MIL-I-6181, MIL-I-11748, MIL-STO-461, 462, 463, FED-STD-222,

And FCC Specification. Also, DCA specifications and others developed for special equipment and systems applications.

ELECTRICAL

CURRENT RATING: The filters shall be capable of carrying full-rated current with a heat rise not exceeding 25°C above ambient temperature. The filters shall be capable of withstanding 150% of rated current overload for 15 minutes without any deterioration.

VOLTAGE: The filters shall be capable of operating continuously at full-rated voltage and of withstanding an over-voltage test of twice the rated voltage for one minute. Maximum voltage drop shall not exceed 2 volts when measured in accordance with MIL-F-15733. Maximum operating temperature: 85°C.

MECHANICAL

CASE: The inner cases of each filter shall be made of C.R.S. 16 GA. min. Each phase filter shall be individually replaceable. All internal filters are hermetically sealed.

TERMINALS: The Military EMI Filters shall be made of high temperature alumina ceramic and shall be leak proofed. The ceramic terminal shall have a flexible insulated lead, one end of which is permanently attached to the terminal, the other end in a permanently affixed lug mounted on .7 approved flame-retardant stand-off insulator secured with a suitable screw. All connections shall be made only at the stand-offs.

IMPREGNANT: Where applicable the Impregnant shall be non-flammable as classified by U.L. and MIL-F-15733.

CONSTRUCTION: Input and output terminals shall be completely enclosed in Military EMI Filters. Covers on the input and output RF shielded compartments shall be held down with screws, Gasketing shall be used between the cover and the inside fitting flange to maintain Military EMI Filters. Internal components shall be mounted and fixed to prevent damage when subjected to applicable shock and vibration tests.

FINISH: All filter cases shall be made rust proof by painting over primer. All unfinished grounding surfaces are protected by suitable plating.

Frequently Asked Questions

What are Military EMI Filters and how do they reduce electromagnetic interference?

Military EMI filters block conducted and radiated EMI to protect sensitive electronics. They use inductors and capacitors to suppress unwanted signals.

What frequency range is supported by DMCRF Military EMI Filters?

These filters generally cover from a few kHz up to several GHz. This wide range addresses all potential EMI sources in military systems.

What attenuation level do Military EMI Filters provide across the frequency range?

They typically provide high attenuation, often 40–100 dB depending on frequency. This ensures effective suppression of both low and high-frequency noise.

Which military standards are supported by these EMI filters?

They comply with MIL-STD-461, MIL-STD-462, and TEMPEST requirements. This ensures suitability for defense and secure communication applications.

What voltage ratings are available for Military EMI Filters?

Voltage ratings typically range from 115 V to 480 V AC. Custom voltages can be provided for specialized equipment.

What current ratings are offered in the DMC-FC 00-W and DMC-FC 00-X series?

Current ratings usually span 1 A to 300 A. The series supports both low and high-power military systems.

Are Military EMI Filters designed for TEMPEST shielded rooms and secure communication facilities?

Yes, they are specifically engineered for TEMPEST environments. They protect classified data and sensitive electronics from EMI leaks.

Can these filters operate continuously under full rated load conditions?

Yes, they are rated for continuous operation at their specified voltage and current. This ensures reliable performance in critical military applications.

What construction materials are used in Military EMI Filters for durability and reliability?

Filters use rugged metal housings, high-quality inductors, and capacitors. These materials provide long-term durability and EMI suppression effectiveness.

Are the internal filter phases replaceable in the Military EMI Filter system?

Yes, many military filters feature modular internal phases. This allows easy maintenance and replacement without full system downtime.

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