SFMC28-461/HH CRANE [Crane Aerospace & Electronics.], SFMC28-461/HH Datasheet

SFMC28-461/HH

Manufacturer Part Number

SFMC28-461/HH

Description

SFMC28-461 EMI Input Filters

Manufacturer

CRANE [Crane Aerospace & Electronics.]

Datasheet

1.SFMC28-461HH.pdf (11 pages)

Current page: 1 of 11
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Crane Aerospace & Electronics

Electronics Group (Interpoint Brand)

PO Box 97005 • Redmond WA 98073-9705

425.882.3100 • electronics@craneae.com

www.craneae.com

Description

The SFMC28-461™ EMI filters provide an off-the-shelf filtering

solution compliant to MIL-PRF-38534, Class H or Class K,

for use in your space system. SFMC28-461 filters reduce

the input line reflected ripple current of our switching DC/DC

converters. Use an SFMC28-461 filter with our SMTR, SMHF

and SMSA series of DC/DC converters to meet MIL-STD-461C

levels of conducted emission (CE01, CE03). The SFMC filters

are designed exclusively with passive components providing

maximum tolerance for space environments.

The SFMC28-461 EMI filters offer environmental screening

levels to Space Prototype (O), Class H, or Class K requirements.

Radiation tolerant to Radiation Hardness Assurance (RHA) levels

of “-” (O) or “H”, per MIL-STD-38534. Interpoint model numbers

use an “O” in the RHA designator position to indicate the “-”

(dash) Radiation Hardness Assurance level of MIL-PRF-38534,

which is defined as “no RHA”. See “Class H and K,

MIL-PRF-38534 Screening” tables for more information.

The SFMC28-461 EMI filter, when used with Interpoint’s

converters, reduces reflected input ripple current by a minimum

of 55 dB at 500 kHz and 60 dB at 1 MHz. The filter and converter

combination performance exceeds the CEO3 requirements of

MIL-STD-461C.

The maximum DC insertion loss for the SFMC28-461 filter (at a

load of 22 watts) represents a power loss of less than 2%.

SFMC28-461 filters incorporate thick-film hybrid technology and

use only high quality ceramic capacitors for reliable high temper-

ature operation.

nSertion

Features

•

ilter

creening

ipple

Fully qualified to Class H or K

Passive components used for maximum tolerance

in space environments

-55°C to +125°C operation

Nominal 28 V input, 0 V to 50 V operation

Up to 2.7 A throughput current

60 dB attenuation typical at 500KHz

Compliant to MIL-STD-461C CE-03

Compatible with MIL-STD-704 A-E 28 VDC power bus

eSign

eduction

oSS

sFMc28-461 eMi input Filters

28 Volt input – 2.7 AMp

Rev D - 20070404

Page 1 of 11

Derating according to the requirements of MIL-STD-975 assures

dependable performance in the harsh environments of space.

Compliance to MIL-STD-975 derating is achieved at or below

case operating temperatures of 90°C.

All SFMC28-461 filters are built to the same assembly drawing

regardless of environmental screening or radiation tolerance

level. Filters designated level OO, indicating standard environ-

mental screening, are electrically comparable to filters designated

level KH, the highest environmental screening level. This ensures

consistency between your prototype or test system using level

OO filters and your flight system using filters with higher levels of

environmental screening and radiation tolerance. Element evalu-

ation (screening at the component level) of Class H or Class K

filters ensures even greater reliability. Refer to Table 1, 2, and 3

for more information.

The filter operates at full load over the temperature range of

-55°C to +125°C case. Above +125°C, the current must be

derated as specified on page two.

SFMC28-461 EMI filters are encased in high-reliability, hermeti-

cally-sealed metal packages and weigh just 48 grams. A small

footprint of 2.110 Inches (53.59 mm) by 1.115 inches (28.32 mm)

by 0.400 inches (10.16 mm) minimizes the board area needed for

the filter. Cover marking inks are NASA approved to Total Mass

Loss (TML) and Collected Volatile Condensable Material (CVCM)

outgassing requirements for operation in space environments.

ackaging For

perating

emperature

Crane Aerospace & Electronics Power Solutions

pace

Input (V)

nput

and

urrent

oltage

Current (A)

2.7

Related parts for SFMC28-461/HH

SFMC28-461/HH Summary of contents

Page 1

... MHz. The filter and converter combination performance exceeds the CEO3 requirements of MIL-STD-461C nSertion oSS The maximum DC insertion loss for the SFMC28-461 filter (at a load of 22 watts) represents a power loss of less than 2 ilter eSign SFMC28-461 filters incorporate thick-film hybrid technology and use only high quality ceramic capacitors for reliable high temper- ature operation ...

Page 2

... Any pin to case, except case pin +Vin Input Common Output impedance of the filter must be less than the combined www.craneae.com sFMc28-461 eMi input Filters 28 Volt input – 2.7 AMp meChaniCal and envirOnmental size (maximum) Non-flanged 2.125 x 1.125 x 0.400 (53.98 x 28.58 x 10.16 mm) See case H1 for dimensions. ...

Page 3

... Filters 28 Volt input – 2.7 AMp pin OUt Pin Designation 1 Positive Input 2 Positive Output 3 Case Ground 4 Output Common 5 Input Common Dot on top of package indicates pin one 1 BOTTOM VIEW SFMC NON-FLANGED AND FLANGED 5 Dotted line outlines flanged package option. ...

Page 4

... OO* - Space prototype, HH, KH Page Rev D - 20070404 Crane Aerospace & Electronics Power Solutions dsCC nUmber DSCC Drawing SFMC28-461 Filter (5915) Similar Part SFMC28-461/HH 94010H02HXC SFMC28-461f/HH 94010H02HXC SFMC28-461/KH 94010H02KXC SFMC28-461/KH 94010H02KZC Flanged SMDs have the suffix HZC in place of HXC. Interpoint’s DSCC drawing models are similar in perfo mance and dimensions to standard models, however, slight differences in specifications may exist ...

Page 5

... Voltage output Current reFleCted rIpple Current poWer dISSIpatIon at maXImum Current Notes 1. Typical applications result in Vout within 2% of Vin. www.craneae.com sFMc28-461 eMi input Filters 28 Volt input – 2.7 AMp CondItIonS mIn ContInuouS 0 — 500 kHz MHz MHz ...

Page 6

... Typical Performance Curves: 25° nominal Vin, unless otherwise specified. www.craneae.com sFMc28-461 eMi input Filters 28 Volt input – 2.7 AMp 90 CE03 Limit .015 0.1 FREQUENCY (MHz) DC/DC Converter Typical Worst Case EMI With SFMC-461 Filter F 3 Igure 5 -15 -35 -55 -75 -95 1K 10K FREQUENCY (MHz) SFMC-461 Typical Amplitude Response vs ...

Page 7

... Filter cases Seam Seal 0.040 dia (1.02) Seal hole: 0.120 ±0.002 (3.05 ±0.05) Case dimensions in inches (mm) Tolerance ±0.005 (0.13) for three decimal places 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. ...

Page 8

... Filter cases Flanged cases: Designator “F” required in Case Option position of model number. Seam Seal 0.040 dia (1.02) 1.110 max. (28.19) Seal hole: 0.120 ±0.002 (3.05 ±0.05) Case dimensions in inches (mm) Tolerance ±0.005 (0.13) for three decimal places ±0.01 (0.3) for two decimal places ...

Page 9

... 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 Mode Scanning Acoustic Microscopy www.craneae.com sFMc28-461 eMi input Filters 28 Volt input – 2.7 AMp k, mil-prF-38534 e S pace p o ...

Page 10

... Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534. Notes: 1. Space Prototype (O), non-QML products, do not meet all of the requirements of MIL-PRF-38534. 2. Not applicable to EMI filters that have no wirebonds. 3. Not required by DSCC but performed to assure product quality. www.craneae.com sFMc28-461 eMi input Filters 28 Volt input – 2.7 AMp p rototype non 2 ...

Page 11

... SFMC EMI Filters, Rev D - 20070404. This revision supercedes all previous releases. 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. SFMC Series is a trademark of Interpoint. Copyright © 1999 - 2007 Interpoint Corporation. All rights reserved. www.craneae.com sFMc28-461 eMi input Filters 28 Volt input – 2.7 AMp k, mil-prF-38534 r ...

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