ence (EMI) for the MOR, MFL, MTR, MHV, MHF+, MHF, MTO
and MHE Series of converters. These filters are intended for
use in 28 volt applications which must meet MIL-STD-461C
CE03 levels of conducted emissions. One filter can be used with
multiple converters up to the rated output current of the filter.
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.
t
RansIents
I
nput
R
Ipple and
eMI
A transient of -100 to +100 V for up to 100 ms with a 0.5 ohm
source impedance will not damage the filter but will be passed on
to the converter:
Switching DC/DC converters naturally generate two noise
components 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 appli-
cations. Common mode noise occurs across stray capacitances
between the converter’s power train components and the base-
plate (bottom of the package) of the converter.
Where low noise currents are required to meet MIL-STD-461C,
a power line filter is needed. The FME28 EMI power line filters
reduces the common mode and differential noise generated by
the converters. FME28 filters reduce input ripple current by as
much as 60 dB at 500 kHz and 1 MHz when used in conjunction
with Interpoint’s DC/DC converters.
O
peRatIOn OveR
t
eMpeRatuRe
I
nseRtIOn
l
Oss
p
ackagIng
The FME28-461 Series filters are rated for operation from -55°C
to +125°C case temperature.
The maximum dc insertion loss at full load and nominal input
voltage represents a power loss of less than 4%.
FME28-461 filters are sealed in metal hermetic side-leaded pack-
ages. See cases U, V, W, Y, and Z.
Crane Aerospace & Electronics
Electronics Group (Interpoint Brand)
PO Box 97005 • Redmond WA 98073-9705
425.882.3100 • power@crane-eg.com
www.interpoint.com
Page 1 of 13
FME28 Rev C - 20100226
Crane Aerospace & Electronics Power Solutions
FMe28-461 eMi input Filters
28 Volt input – 15 aMp
Operating COnditiOns and
CharaCteristiCs
input Voltage range
•
0 to 50 VDC continuous
•
Transient -100 to +100 volts for 100 ms
meChaniCal and envirOnmental
size (maximum)
•
Case U
3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 10.16 mm)
The image on page one shows Case U (flanged, short leads).
•
Also available:
‣
Flanged: leads bent down (case V)
‣
Tabbed: leads bent up (case W)
‣
Tabbed: short leads (case Y)
‣
Tabbed: leads bent down (case Z).
•
See cases U, V, W, Y, and Z for dimensions and options.
Weight (maximum)
•
77 grams typical cases U, V, W, Y, and Z
screening
lead soldering temperature (10 sec per lead)
•
300°C
storage temperature range (t
c
)
•
-65°C to +150°C
isolation
•
100 megohm minimum at 500 VDC
•
Any pin to case
Derating input/output current
•
Linearly from 15 A at 95°C to 10 A at 125°C to zero at 135° C
•
15 A max at 95°C to 10 A max at 125°C
case operating temperature (t
c
)
•
-55°C to +125°C full power
•
-55°C to +135°C absolute
The FME28 EMI Input filter offers Standard, /ES or 883, Class H,
QML screening. See page 13 “883 (Class H, QML), Standard and
/ES (non-QML)” screening table for more information.
EMI FILTER
+Vin
Case
Output
Input
Common Common
+Vout
DC/DC CONVERTER
+Vin
+Vout
RL
Case
Output
Input
Common Common
Chassis
ground
Multiple units
allowed up to
rated output
current of filter
RL
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.
F
IguRe
1: c
OnnectIOn
d
IagRaM
Positive
Input
Positive
Output
Input
Common
Output
Common
FME28-461
F
IguRe
2: s
cheMatIc
www.interpoint.com
Page 2 of 13
FME28 Rev C - 20100226
Crane Aerospace & Electronics Power Solutions
FMe28-461 eMi input Filters
28 Volt input – 15 aMp
pin out
pin
1
Designation
1, 2, 3
4, 5, 6
10, 11, 12
—
7, 8, 9
Positive Input
Input Common
Output Common
Positive Output
Case Ground
2
Notes
1. All pins must be connected.
2. The baseplate is the only case ground connection and
should directly contact chassis ground.
Angled corner and cover marking indicate pin one for cases U and V.
Cover marking indicates pin one for cases W, Y and Z.
1
2
3
4
5
6
TOP VIEW
U Case
Outline shown is case U, pin out is the same
for all cases. See cases U, V, W, Y, and Z
for dimensions.
12
11
10
9
8
7
F
IguRe
3: p
In
O
ut
www.interpoint.com
Page 3 of 13
FME28 Rev C - 20100226
Crane Aerospace & Electronics Power Solutions
FMe28-461 eMi input Filters
28 Volt input – 15 aMp
MoDel nuMBering key
Base Model
Input Voltage
FME
28 - 461
V
/ 883
dscc d
rawing
(5915)
-95004-01HTC
-95004-01HUC
-95004-01HXC
-95004-01HYC
-95004-01HZC
Dscc nuMBers
fme28 s
imilar
P
art
FME28-461W/883
FME28-461V/883
FME28-461/883
FME28-461Y/883
FME28-461Z/883
MIL-STD-461 Reference
Case/Lead Option*
Screening
(Standard screening has no designator
in this position.)
*Case/Lead Option:
See cases U, V, W, Y, and Z for drawings and dimensions.
For exact specifications for a DSCC product, refer to the
DSCC drawing. DSCC drawings can be downloaded
from: http://www.dscc.dla.mil/programs/smcr
case options:
Dscc cross referenced
to interpoint
DSCC
Case Option
T
U
X
Y
Z
Interpoint
Case Option
W
V
(standard
case, no option
required)
Y
Z
O
n the lines belOw
,
enter One selectiOn frOm under each categOry
tO determine the mOdel number
.
category
FMe28
Base MoDel anD
input Voltage
MoDel selection
-461
Mil-stD-461 reFerence
_______
case/leaD
option
1
u (leave blank)
/
______
screening
2
standard (leave blank)
es
883 (class H, QMl)
selection
“FMe28” is the
only available
selection
“-461” is the only
available selection
V
W
y
Z
Notes:
1. Case U is the standard, side-leaded, flanged case. Leave the option blank for case U. Refer to the case drawings on pages 7 - 11 for other case options.
2. Leave blank for standard screening. Use “ES” for “ES” screening and “883” for Class H screening. See the table on page 13 for more information.
www.interpoint.com
Page 4 of 13
FME28 Rev C - 20100226
Crane Aerospace & Electronics Power Solutions
FMe28-461 eMi input Filters
28 Volt input – 15 aMp
Electrical Characteristics: 25°C
t
c
, nominal Vin, unless otherwise specified.
MODEL
paRaMeteR
Input vOltage
nOIse ReJectIOn
dc ResIstance (R
dc
)
at MaXIMuM cuRRent
1
capacItance
1
Output vOltage
Output cuRRent
pOWeR dIssIpatIOn
at MaXIMuM cuRRent
1
cOndItIOns
tRansIent 100
ms
1,
2
500
k
h
z
1 Mh
z
t
c
= 125°c
t
c
= 25°c
cOntInuOus
MIN
0
-100
60
60
—
—
FME28-461
TYP
28
—
—
—
—
—
60,000
V
OUT
= V
IN
- I
IN
(R
DC
)
—
—
—
—
—
—
15
3
13.5
19.7
MAX
50
100
—
—
0.07
0.07
unIts
VDC
V
dB
Ω
pF
VDC
A
W
anY pIn tO case
steadY state
steadY state
t
c
= 125°c
t
c
= 25°c
Note
1. guaranteed by design, not tested.
2. 0.5 ohm source impedance
3. 15 A maximum at 95°C, derate linearly to 10A at 125°C
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