INTERPOINT SFME120-461

FEATURES
• Fully qualified to Class H or K
• Passive components for
maximum tolerance in space
environments
• –55° to +125°C operation
• 120 volt input
• Up to 2.1 amps of
throughput current
• Up to 60 dB attenuation
at 500 kHz.
• Compliant to
Size (max.):
MIL-STD-461C, CE03
Weight:
• Compatible with
Screening:
MIL-STD-704E
DC power bus
SFME120-461
EMI FILTER 2.1
AMP
EMI INPUT FILTER
120 VOLT INPUT
MODEL
SFME120-461
2.1 amp
3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 10.16mm)
See Section B8, case U1, for dimensions.
110 grams maximum
Standard, Class H, or Class K (MIL-PRF-38534)
See Section C2 for screening options, see Section A5 for
ordering information.
DESCRIPTION
The SFME120-461™ EMI filter modules are specifically designed to
reduce the reflected input ripple current of Interpoint’s high
frequency DC/DC converters. SFME120-461 filters minimize electromagnetic interference (EMI) for Interpoint’s SMHP120 Series of
converters. These filters are intended for use in 120 volt applications which must meet MIL-STD-461 levels of conducted emissions. One filter can be used with multiple converters up to the rated
throughput current of the filter.
SCREENING AND REPORTS
The SFME120-461 filter offers three screening options – Standard,
Class H, or Class K. See Section C2, Quality Assurance, pages C27 through C2-9, for descriptions. Detailed reports on product
performance are also available and are listed on page C2-9.
INPUT RIPPLE AND EMI
filter reduces the common mode and differential noise generated by
the converters. SFME120-461 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.
The filter must be placed 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.
OPERATION OVER TEMPERATURE
SFME120-461 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.
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.
INSERTION LOSS
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 most applications.
PACKAGING
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-STD461, a power line filter is needed. The SFME120-461 EMI power line
The maximum dc insertion loss at full load and nominal input voltage
represents a power loss of less than 4%.
SFME120-461 filters are sealed in metal hermetic side-leaded packages (see Section B8, cases 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).
For more information, contact your Interpoint representative
listed in Section A5.
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 specifications without notice. SFME120-461 is a trademark of Interpoint.
Copyright © 1999 Interpoint. All rights reserved.
B1-12
CASES
CASE U
Angled corner indicates pin one
1.505 max (38.23)
CASE U
TOP VIEW
(PIN SIDE)
See Figures 55 and 56 for dimensions
3.005 (76.33) max.
Note: Pins are shown for Case U1.
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.
FIGURE 54: CASE U MAXIMUM DIMENSIONS
B8-36
CASES
CASE U
TOP VIEW CASE U1
MFL Series and MHP Series: Screening – Standard, ES or 883
MFLHP Series, FMD270 EMI Filter, and FMD28-461SL EMI Filters:
Screening – Standard or ES
SMFL, SMFLHP, SMHP, and SSP Series; SFCS, and SFME EMI Filters:
Screening – Standard, Class H or K
HUM70 Module and LCM Module: Screening – Standard or ES
Seam Seal
Angled corner
indicates pin one.
0.23 (5.8) Lead Length
0.128 dia
(3.25).
1.505 (38.23) max.
0.040 dia
(1.02)
1.380 (35.05)
1.250 (31.75)
1
12
1.050 (26.67)
2
11
0.850 (21.59)
3
10
0.650 (16.51)
4
9
0.450 (11.43)
5
8
0.250 (6.35)
6
7
0.220 (5.59
0.050 (1.27)
0.000
0.400 (10.16) max.
2.880 (73.15)
3.005 (76.33) max.
2.750 (69.85)
0.000
0.120 (3.05)
0.250 (6.35)
0.120 (3.05)
0.000
FIGURE 55: CASE U1
B8-37
QA SCREENING
SPACE PRODUCTS
SPACE PRODUCTS
ELEMENT EVALUATION
TEST PERFORMED
(COMPONENT LEVEL)
STANDARD
CLASS
(O)
H
M/S
P M/S
P
CLASS
K
M/S
P
Element Electrical
yes
no
yes
yes yes
yes
Element Visual
no
no
yes
yes yes
yes
Internal Visual
no
no
yes
no
yes
no
Temperature Cycling
no
no
no
no
yes
yes
Constant Acceleration
no
no
no
no
yes
yes
Interim Electrical
no
no
no
no
yes
no
Burn-in
no
no
no
no
yes
no
Post Burn-in Electrical
no
no
no
no
yes
no
Steady State Life
no
no
no
no
yes
no
Voltage Conditioning /Aging
no
no
no
no
no
yes
Visual Inspection
no
no
no
no
no
yes
Final Electrical
no
no
yes
yes yes
yes
Wire Bond Evaluation*
no
no
yes
yes yes
yes
SEM
SLAM™/C-SAM:
Input capacitors only
(Add’l test, not req. by H or K)
no
no
no
no
yes
no
no
no
no
yes
no
yes
Notes
M/S
P
*
Active components (Microcircuit and Semiconductor Die)
Passive components
Not applicable to EMI filters that have no wirebonds
Definitions
Element Evaluation: Component testing/screening per MIL-STD-883 as determined by MIL-PRF-38534
SEM: Scanning Electron Microscopy
SLAM™: Scanning Laser Acoustic Microscopy
C-SAM: C - Mode Scanning Acoustic Microscopy
Applies to the following products:
SMFLHP Series
SMFL Series
SMHP Series (O&H only)
SMTR Series
SSP Series
SMHF Series
SMSA Series
SLH Series
SLIM Module
SFME120 EMI Filter
SFME28 EMI Filter
SFCS EMI Filter
SFMC EMI Filter
STF EMI Filter
C2-7
QA SCREENING
SPACE PRODUCTS
ENVIRONMENTAL SCREENING
TEST PERFORMED
(END ITEM LEVEL)
Non-destruct bond pull*
Method 2023
Pre-cap inspection
Method 2017, 2032
Temperature cycle
Method 1010, Cond. C
Constant acceleration
Method 2001, 3000 g
PIND Test
Method 2020, Cond. B
Radiography
Method 2012
Pre burn-in test
Burn-in, Method 1015, 125°C
96 hours
160 hours
2 x 160 hour (includes mid BI test)
Final electrical test
MIL-PRF-38534, Group A
Hermeticity test
Fine Leak,
Method 1014, Cond. A
Gross Leak,
Method 1014, Cond. C
Final visual inspection
Method 2009
STANDARD
(O)
CLASS
H
CLASS
K
no
no
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
no
no
yes
no
yes
no
yes
yes
yes
yes
no
no
no
yes
no
no
no
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534.
Note
* Not applicable to EMI filters that have no wirebonds.
Applies to the following products:
SMFLHP Series
SMFL Series
SMHP Series (O&H only)
SMTR Series
SSP Series
C2-8
SMHF Series
SMSA Series
SLH Series
SLIM Module
SFME120 EMI Filter
SFME28 EMI Filter
SFCS EMI Filter
SFMC EMI Filter
STF EMI Filter