Crane Aerospace & Electronics Power Solutions
sFMc28-461 eMi iꢀꢁuꢂ Fꢃlꢂꢄꢅꢆ
28 Voꢇt inpꢈt – 2.7 AMp
Operating COnditiOns and CharaCteristiCs
meChaniCal and envirOnmental
iꢀꢁuꢂ Vꢉlꢂagꢄ raꢀgꢄ
• 0 to 50 VDC continuous
sꢃzꢄ (maxꢃmum)
Non-flanged
ꢇꢄad sꢉldꢄꢅꢃꢀg tꢄmꢁꢄꢅaꢂuꢅꢄ (10 ꢆꢄꢊ ꢁꢄꢅ ꢁꢃꢀ)
• 300°C
sꢂꢉꢅagꢄ tꢄmꢁꢄꢅaꢂuꢅꢄ raꢀgꢄ (caꢆꢄ)
• -65°C to +150°C
2.125 x 1.125 x 0.400 (53.98 x 28.58 x 10.16 mm)
See case H1 for dimensions.
Flanged
caꢆꢄ oꢁꢄꢅaꢂꢃꢀg tꢄmꢁꢄꢅaꢂuꢅꢄ (tꢊ)
• -55°C to +125°C full power
Dꢄꢅaꢂꢃꢀg ouꢂꢁuꢂ pꢉwꢄꢅ/cuꢅꢅꢄꢀꢂ
• Derate linearly from 100% at 125°C to 0% at
135°C case
iꢀꢁuꢂ ꢂꢉ ouꢂꢁuꢂ caꢁaꢊꢃꢂaꢀꢊꢄ
• 0.048 µF max., any pin to case
iꢆꢉlaꢂꢃꢉꢀ
2.910 x 1.125 x 0.400 inches (73.91 x 28.58 x 10.16 mm)
See case K2 for dimensions.
Wꢄꢃghꢂ (maxꢃmum)
48 grams typical
sꢊꢅꢄꢄꢀꢃꢀg
Space Prototype (O), Class H, or Class K
• 100 megohm minimum at 500 VDC
• Any pin to case, except case pin
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. Available configurations: OO, HH, KH
EMI FILTER
DC/DC CONVERTER
+Vin
Input
+Vin
+Vout
+Vout
Case
Case
R
R
L
L
Output
Output
Common
Input
Common
Common Common
Multiple units
allowed up to
rated output
current of filter*
Output impedance of the filter must be less than the combined
input impedance of the DC/DC converters.
FIgure 1: ConneCtIon dIagram
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