MODELS

NPUT

OLTAGE

AND

URRENT

B3-7

Input (V)

28
28

270
270

Current ( A)

7.0

15.0

0.7
1.5

DESCRIPTION

The FMD SeriesTM and FME SeriesTM EMI filters are specifically
designed to reduce the reflected input ripple current of Interpoint's
high frequency DC/DC converters. FMD/FME filters minimize elec-
tromagnetic interference (EMI) for the MHE, MHL, MLP, MRH, MTO,
MHF, MHF+, MHV, MHD, MTR, MFL, MHP, and MFLHP Series.
These filters are intended for use in 28 or 270 volt applications
which must meet MIL-STD-461C, CE03 levels of conducted emis-
sions. One filter can be used with multiple converters up to the rated
output current of the filter.

NPUT

IPPLE AND

EMI

Switching DC/DC converters naturally generate two noise compo-
nents on the power input line: differential noise and common mode
noise. Input ripple current refers to both of these components.
Differential noise occurs between the positive input and input
common. Most Interpoint converters have an input filter that reduces
differential noise which is sufficient for many applications. Common
mode noise occurs across stray capacitances between the
converter's power train components and the baseplate (bottom of
the package) of the converter.

Where low noise currents are required to meet CE03 of MIL-STD-
461, a power line filter is needed. The FMD/FME Series of EMI
power line filters reduces the common mode and differential noise
generated by the converters. FMD/FME-461 filters reduce input
ripple current by as much as 60 dB at 500 kHz and 55 dB at 1 MHz
when used in conjunction with Interpoint's DC/DC converters. See
Figures 8 and 9.

Place the filter as close as possible to the converter for optimum
performance. The baseplates of the filter and the converter should be
connected with the shortest and widest possible conductors. For the

best connection, mount the filter's and converter's baseplates on or
above a small ground plane. See Figure 5.

RANSIENTS

The transients listed below will not damage the filter but will be
passed on to the converter:

All filters: ±600 volts (50 ohm source
impedance) for up to 10 µs.

28 volt filter: ±100 volts (0.5 ohm source
impedance) for up to 100 ms.

270 volt filter: ±500 volts (independent of
source impedance) for up to 100 ms.

PERATION OVER

EMPERATURE

All FMD/FME-461 Series filters are rated for full power operation
from 55°C to +125°C case temperature. Current is derated linearly
to zero at +135°C case temperature.

NSERTION

OSS

The maximum dc insertion loss at full load and nominal input voltage
represents a power loss of less than 4%.

ACKAGING

FMD/FME-461 filters are sealed in metal hermetic side-leaded
packages. See Section B8, cases U1, U2, V, W, Y, and Z.
Additionally the FMD28-461 filter is available in a metal hermetic
down-leaded package (see Section B8, case J4).

AYOUT

EQUIREMENTS

The case of the filter must be connected to the case of the converter
through a low impedance connection to minimize EMI.

EMI I

NPUT

ILTERS

28 & 270 V

OLT

NPUT

FMD/FME EMI FILTER

0.7 TO 15 AMP

EATURES

· 55°C to +125°C operation
· Up to 60 dB attenuation

at 500 kHz.

· Compliant to

MIL-STD-461C, CE03

· Compatible with

MIL-STD-704E
DC power bus

Size (max.): Case U2, FME all models; Case U1, FMD28-461SL and FMD270-461SL

3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 11.16 mm)
[FME models, shown in Case U2 (flanged, short leads). Also available:
Flanged leads bent down (case V); Tabbed leads bent up (case W), short
leads (case Y), and leads bent down (case Z).See Section B8, cases U2, V, W,
Y, and Z for dimensions and options.]
Case J4, FMD28-461
2.720 x 1.350 x 0.505 inches (69.09 x 34.29 x 12.83 mm)
See Section B8, cases J4, U1, U2, V, W, Y, and Z for dimensions.

Weight:

77 grams typical cases U1, U2, V, W, Y, and Z; 55 grams typical case J4

Screening: Standard, ES, or 883 (Class H).

See Section C2 for screening options, see Section A5 for ordering information.

ABSOLUTE MAXIMUM RATINGS

RECOMMENDED OPERATING CONDITIONS

Input Voltage

· 0 to 40 VDC continuous for 28 V models
· 0 to 400 VDC continuous for 270 V models

Lead Soldering Temperature (10 sec per lead)

· 300°C

Storage Temperature Range (Case)

· 65°C to +150°C

Isolation

· 100 megohm minimum at 500 V, any pin to case

(except FMD downleaded case case pin)

B3-8

FMD/FME EMI FILTER
0.7 TO 15 AMP

Input Voltage Range

· 0 to 40 VDC continuous for 28 V models
· 0 TO 400 VDC continuous for 270 V models

Case Operating Temperature (Tc)

· 55°C to +125°C full power
· 55°C to +135°C absolute

Derating Input/Output Current

· Linearly from 100% at 125°C to 0% at 135° C

Electrical Characteristics: 25°C Tc, nominal Vin, unless otherwise specified.

EMI I

NPUT

ILTERS

FMD28-461

FMD270-461

FME28-461

FME270-461

PARAMETER

CONDITION

MIN

TYP

MAX

MIN

TYP

MAX

MIN

TYP

MAX

MIN

TYP

MAX

UNITS

INPUT VOLTAGE

CONTINUOUS

270

400

270

400

VDC

TRANSIENT 100 ms

100

500

100

500

NOISE 500

kHz

REJECTION

1 MHz

DC RESISTANCE

MAX. CURRENT

) Tc=25°C

0.12

5.0

0.07

2.0

Tc=125°C

0.15

6.3

0.07

3.2

CAPACITANCE

ANY PIN TO CASE

20,000

30,000

60,000

OUTPUT VOLTAGE STEADY STATE

OUT

= V

- I

)

VDC

OUTPUT CURRENT

STEADY STATE

0.7

1.5

POWER

MAX. CURRENT

DISSIPATION

Tc=25°C

6.0

2.5

15.75

4.5

Tc=125°C

7.4

3.1

15.75

7.2

Note
1. 28 V models = 0.5

source impedance, 270 V models = independent of source impedance.

B3-10

FMD/FME EMI FILTER
0.7 TO 15 AMP

EMI I

NPUT

ILTERS

0.1 F

50 V

0.01 F

500 V

Positive

Input

Common

Positive
Output

Output
Common

FMD28-461

4.1 H

135 H

6 F
50 V

10 F
50 V

1.3

135 H

0.015 F

500V

0.015 F

Positive

Input

Common

Positive
Output

Output
Common

FMD270-461

18.5 H

0.68 F

1.3

0.015 F

844 H

+Vin

+Vout

Input
Common

Output

Common

Case

EMI FILTER

DC/DC CONVERTER

+Vin

+Vout

Input
Common

Output

Common

Case

Chassis

ground

Multiple units
allowed up to

rated output

current of filter

IGURE

5: C

ONNECTION

IAGRAM

IGURE

3: FMD28-461 S

CHEMATIC

 T

YPICAL

ALUES

IGURE

4: FMD270-461 S

CHEMATIC

 T

YPICAL

ALUES

The case ground connection between the filter and the converter should be as low an impedance as possible
to minimize EMI. Direct contact of baseplate to chassis ground provides the lowest impedance.

PIN OUT DOWN-LEADED MODEL

PIN OUT SIDE-LEADED MODELS

MODEL NUMBERING KEY

Angled corner and cover marking indicate pin one for cases U1, U2, and V.
Cover marking indicates pin one for cases W, Y and Z.

TOP VIEW

All FME models, FMD28-461SL,

and FMD270-461SL

(Pin side, marked side)

FME 28 - 461 V / 883

Base Model

Input Voltage

MIL-STD-461 Reference

Screening

Case/Lead Option*

(Standard screening has no designator
in this position.)

B3-11

FMD/FME EMI FILTER

0.7 TO 15 AMP

EMI I

NPUT

ILTERS

Outline shown is case U2, pin out is the same for all
side-leaded cases. Also available: flanged leads bent
down (case V); tabbed leads bent up (case W), short
leads (case Y), and leads bent down (case Z). See
Section B8, cases U1, U2, V, W, Y, and Z for dimensions.

Pin

Designation

1, 2, 3

Positive Input

4, 5, 6

Input Common

7, 8, 9

Output Common

10, 11, 12

Positive Output

Case Ground

Notes
1. All pins must be connected.
2. The baseplate is the only case ground connection and

should directly contact chassis ground.

FMD28-461SL, FMD270-461SL,

FME28-461, and FME270-461

IGURE

6: P

IDE

-L

EADED

ODELS

Squared corner and dot on top
of package indicate pin one.

BOTTOM VIEW

FMD28-461

IGURE

7: P

FMD28-461

See Section B8, case J4, for dimensions.

Pin

Designation

Positive Input

Positive Output

Output Common

Case Ground

Input Common

Note
1. Although down-leaded packages can be

connected to chassis ground with the case
ground lead, direct contact of the base plate to
chassis improves EMI performance.

DSCC NUMBERS

DSCC D

RAWING

(5915)

95004-01HXC
95004-01HTC
95004-01HUC
95004-01HYC
95004-01HZC
95009-01HXC
IN PROCESS
IN PROCESS
IN PROCESS
IN PROCESS

FME S

ERIES

IMILAR

ART

FME28-461/883
FME28-461W/883
FME28-461V/883
FME28-461Y/883
FME28-461Z/883
FME270-461/883
FME270-461W/883
FME270-461V/883
FME270-461Y/883
FME270-461Z/883

FMD28-461

For exact specifications for a DSCC product, refer to the
DSCC drawing. Contact your Interpoint representative for
status on the FME DSCC releases. See Section A3,
"SMD/DSCC Lists", for more information.

*Case/Lead Option: See section B8, cases J4, U1, U2, V, W, Y, and Z for
drawings and dimensions, see Section A5 for ordering information.

FME models: Case U2 has no designator in the case/lead option position.
To designate a case option add the case letter to the model number
FME28-461V.

FMD models: Case J4 (down-leaded) has no designator in the case/lead-
option position. To designate case U1 (side-leaded) for the FMD place
"SL" in the case/lead option position FMD28-461SL. The 270 volt FMD
is only available in the side-leaded case FMD270-461SL.

B3-12

Typical Performance Curves: 25°C Tc , nominal Vin, unless otherwise specified.

IGURE

FREQUENCY (kHz)

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

100

IMPEDANCE (OHMS)

DC BIAS: 10 AMP

FME28-461 OUTPUT IMPEDANCE

FREQUENCY (MHz)

EMISSION LEVEL (dB A

0.1

.015

CE03 LIMIT

NARROWBAND

IGURE

FREQUENCY (MHz)

EMISSION LEVEL (dB A)

0.1

.015

NARROWBAND

CE03 LIMIT

IGURE

FREQUENCY (kHz)

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

100

IMPEDANCE (OHMS)

DC BIAS: 1 AMP

FME28-461 OUTPUT IMPEDANCE

FMD/FME EMI FILTER
0.7 TO 15 AMP

EMI I

NPUT

ILTERS

Three paralleled and synchronized MFL2815D

converters without filtering.

Three paralleled and synchronized MFL2815D

converters with an FME28-461.

22021-001-DTS Rev B (CaseJ4) DQ# 4002
All technical information is believed to be accurate, but no responsibility is assumed for
errors or omissions. Interpoint reserves the right to make changes in products or spec-
ifications without notice. FMD Series and FME Series are trademarks of Interpoint.
Copyright © 1992 - 1999 Interpoint. All rights reserved.

B8-39

CASE V

ASES

0.000

0.220 (5.59)

0.050 (1.27)

0.400 (10.16) max

0.250 (6.35)

.050 (1.27)

0.225 (5.72

3.45 (87.6) Reference

(lead center to lead center)

0.000

0.120 (3.05)

0.250 (6.35)

0.450 (11.43)

0.650 (16.51)

0.850 (21.59)

1.050 (26.67)

1.250 (31.75)

1.380 (35.05)

0.000

0.120 (3.05)

0.250 (6.35)

2.750 (69.85)

2.880 (73.15)

0.128 dia (3.25)

0.040 dia

(1.02)

PIN-SIDE VIEW CASE V*

Flanged case, down leaded)

MOR Series and FME EMI Filters: Screening Standard, ES, or 883
Also available in U2, W, Y, and Z cases (Figures 56 and 58 - 60)

*Requires case option designator added to model number: MOR2805SV

See Section A5, Ordering Information.

Maximum dimensions: 3.005 x 1.505 (76.33 x 38.23 mm)

Materials
Header Cold Rolled Steel/Nickel/Gold
Cover

Kovar/Nickel

Pins #52

alloy/Gold

compression glass seal

Case dimensions in inches (mm)
Tolerance

0.005 (0.13) for three decimal places

0.01 (0.2) for two decimal places

unless otherwise specified

CAUTION
Heat from reflow or wave soldering may damage
the device. Solder pins individually with heat
application not exceeding 300

C for 10 seconds

per pin.

Angled corner

indicates pin one.

IGURE

57: C

ASE

B8-40

CASE W

ASES

0.040 dia

(1.02)

0.250 (6.35) Typ.

0.125

(3.18)

0.375

(9.53)

0.575

(14.61)

0.775

(19.69)

0.975

(24.77)

1.175

(29.85

1.375

(34.93)

1.625

(41.28)

2.125 (53.98)

0.375 (9.53)

0.140 dia
(3.56)

0.000

1.750 (44.45)

0.000

0.250 (6.35)
Typ.

1.450 (36.83)

0.300 (7.62)

1.750 (44.45)

2.000

(50.80)

PIN-SIDE VIEW CASE W*

(Tabbed case, up-leaded)

MOR Series and FME EMI Filters: Screening Standard, ES, or 883
Also available in U2, V, Y, and Z cases (Figures 56, 57, 59 and 60)

0.000

0.220 (5.59)

0.050 (1.27)

0.400 (10.16) max.

0.000

0.220 (5.59)

0.400 (10.16) max.

0.84

0.05

(21.3

1.3)

0.84

0.05

(21.3

1.3)

0.150 (3.81)

Lead Detail

2.80 (71.1) Reference

(lead center to lead center)

*Requires case option designator added to model number: MOR2805SW

See Section A5, Ordering Information.

Materials
Header Cold Rolled Steel/Nickel/Gold
Cover

Kovar/Nickel

Pins #52

alloy/Gold

compression glass seal

Case dimensions in inches (mm)
Tolerance

0.005 (0.13) for three decimal places

0.01 (0.2) for two decimal places

unless otherwise specified

CAUTION
Heat from reflow or wave soldering may damage
the device. Solder pins individually with heat
application not exceeding 300

C for 10 seconds

per pin.

IGURE

58: C

ASE

B8-41

CASE Y

ASES

Bathtub
Seam Seal

0.250 (6.35) Typ.

0.125

(3.18)

0.375

(9.53)

0.575

(14.61)

0.775

(19.69)

0.975

(24.77)

1.175

(29.85

1.375

(34.93)

1.625

(41.28)

2.125 (53.98)

0.375 (9.53)

0.140 dia
(3.56)

0.000

1.750 (44.45)

0.000

0.250 (6.35)
Typ.

1.450 (36.83)

0.300 (7.62)

1.750 (44.45)

2.000

(50.80)

0.000

0.220 (5.59)

0.050 (1.27)

0.400 (10.16)

max.

PIN-SIDE VIEW CASE Y*

(Tabbed case, straight leads)

MOR Series and FME EMI Filters: Screening Standard, ES, or 883
Also available in U2, V, W, and Z casee (Figures 56, 57, 58 and 60)

0.000

0.220 (5.59)

0.400 (10.16) max.

0.30

0.05

(7.6

1.3)

Lead Detail

Pin Length

0.30

0.05

(7.6

1.3)

3.10 (78.7) Reference

*Requires case option designator added to model number: MOR2805SY

See Section A5, Ordering Information.

0.040 dia

(1.02)

Materials
Header Cold Rolled Steel/Nickel/Gold
Cover

Kovar/Nickel

Pins #52

alloy/Gold

compression glass seal

Case dimensions in inches (mm)
Tolerance

0.005 (0.13) for three decimal places

0.01 (0.2) for two decimal places

unless otherwise specified

CAUTION
Heat from reflow or wave soldering may damage
the device. Solder pins individually with heat
application not exceeding 300

C for 10 seconds

per pin.

IGURE

59: C

ASE

B8-42

CASE Z

ASES

0.250 (6.35) Typ.

0.125

(3.18)

0.375

(9.53)

0.575

(14.61)

0.775

(19.69)

0.975

(24.77)

1.175

(29.85

1.375

(34.93)

1.625

(41.28)

2.125 (53.98)

0.375 (9.53)

0.140 dia
(3.56)

0.000

1.750 (44.45)

0.000

0.250 (6.35)
Typ.

1.450 (36.83)

0.300 (7.62)

1.750 (44.45)

2.000

(50.80)

PIN-SIDE VIEW CASE Z*

(Tabbed case, down-leaded)

MOR Series and FME EMI Filters: Screening Standard, ES, or 883
Also available in U2, V, Y, and W cases (Figures 56, 57, 58 and 59)

*Requires case option designator added to model number: MOR2805SZ

See Section A5, Ordering Information.

0.000

0.220 (5.59)

0.050 (1.27)

0.400 (10.16) max.

0.000

0.220 (5.59)

0.400 (10.16) max.

0.36

0.05

(9.1

0.13)

0.150 (3.81)

Lead Detail

2.80 (71.1) Reference

(lead center to lead center)

0.36

0.05

(9.1

0.13)

0.040 dia

(1.02)

Materials
Header Cold Rolled Steel/Nickel/Gold
Cover

Kovar/Nickel

Pins #52

alloy/Gold

compression glass seal

Case dimensions in inches (mm)
Tolerance

0.005 (0.13) for three decimal places

0.01 (0.2) for two decimal places

unless otherwise specified

CAUTION
Heat from reflow or wave soldering may damage
the device. Solder pins individually with heat
application not exceeding 300

C for 10 seconds

per pin.

IGURE

60: C

ASE

B8-22

CASE J

ASES

Materials
Header Case J1

Cold Rolled Steel/Nickel/Gold

Cases J2 - J5

Cold Rolled Steel/Nickel/Tin

Cover Case

Kovar/Nickel

Case J2 - J5

Cold Rolled Steel/Nickel/Tin

Pins

#52 alloy (all cases)
Case J1

MHV Series Triple compression glass seal
MTR Series Triple ceramic seal

Cases J2 - J5

compression glass seal

Case dimensions in inches (mm)
Tolerance

0.005 (0.13) for three decimal places

0.01 (0.2) for two decimal places

unless otherwise specified

CASE J

BOTTOM VIEW

See Figures 36 - 40
for pin configuration

1.350 max

(34.29)

CAUTION
Heat from reflow or wave soldering may damage
the device. Solder pins individually with heat
application not exceeding 300

C for 10 seconds

per pin.

Flange Thickness:

Cases J1 and J5

0.060 (1.52)

Case J2

0.073 (1.85) max

Cases J3 and J4

0.067 +0.005/-0.007 (1.70 +0.13/-0.8)

2.720 max

(69.09)

Dot on top of case indicates pin one

IGURE

35: C

ASE

J M

AXIMUM

IMENSIONS

Note: Although every effort has been made to render the case drawings at actual size, variations in the printing process may cause some distortion. Please refer

to the numerical dimensions for accuracy.

C2-10

TEST (125°C Products)

STANDARD

/ES

/883 (Class H)*

PRE-CAP INSPECTION

Method 2017, 2032

yes

TEMPERATURE CYCLE (10 times)

Method 1010, Cond. C, -65°C to 150°C

yes

Method 1010, Cond. B, -55°C to 125°C

yes

CONSTANT ACCELERATION

Method 2001, 3000 g

yes

Method 2001, 500 g

yes

BURN-IN

Method 1015, 160 hours at 125°C

yes

96 hours at 125°C case (typical)

yes

FINAL ELECTRICAL TEST MIL-PRF-38534, Group A

Subgroups 1 through 6: -55°C, +25°C, +125°C

yes

Subgroups 1 and 4: +25°C case

yes

HERMETICITY TESTING

Fine Leak, Method 1014, Cond. A

yes

Gross Leak, Method 1014, Cond. C

yes

Gross Leak, Dip (1 x 10

-3

)

yes

FINAL VISUAL INSPECTION

Method 2009

yes

Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534.

*883 products are built with element evaluated components and are 100% tested and guaranteed over

the full military temperature range of 55°C to +125°C.

MOR Series
MFLHP Series
MFL Series
MHP Series
MTR Series
MQO Series**

MHD Series
MHV Series
MHF+ Series
MHF Series**
MGA Series
MSA Series

MGH Series
MCH Series
FM-704A EMI Filter
FMD**/FME EMI Filter
FMC EMI Filter
FMH EMI Filter

FMGA EMI Filter
FMSA EMI Filter
HUM Modules**
LCM Modules**
LIM Modules

QA SCREENING
125°C PRODUCTS

125°C P

RODUCTS

Applies to the following products

**MFLHP Series, MQO Series, MHF Series, FMD EMI Filters, Hum Modules, and LCM Modules do not offer
`883" screening.

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: FME270-461Y/883

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: FME270-461Y/883