Operating COnditiOns and CharaCteristiCs

Input Voltage Range

• 0 to 50 VDC continuous

lead Soldering Temperature (10 sec per lead)

• 300°C

Storage Temperature Range (Case)

• -65°C to +150°C

Case Operating Temperature (Tc)

• -55°C to +125°C full power

Derating Input/Output Current

• Derate linearly from 100% at 125°C to 0% at 135°C

case.

Capacitance

• 0.045 µF max, any pin to case

Isolation

• 100 megohm minimum at 500 VDC

• Any pin to case, except case pin

meChaniCal and envirOnmental

Size (maximum)

0.980 x 0.805 x 0.270 (24.89 x 20.45 x 6.86 mm)

See case A1 for dimensions.

Weight (maximum)

10.3 grams typical, 11.5 grams maximum

Screening

Space Prototype (O), Class H, or Class K

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

2 �F

6800 pF

500 V

6800 pF

500 V

Positive

Input

Input

Common

Positive

Output

Output

Common

STF28-461

>285 �H

6 �H

2 �F

20 �

20 �

0.65 �

6 �H

6800 pF / 500 V

6800 pF / 500 V

x 2

x 2

The case ground connection between the filter and the converter should be as low an impe

ance as possible to minimize EMI. Direct contact of baseplate to chassis ground provides the

RL

Positive

Output

STF28-461

Positive

Input

Input

Common

Case

Ground

Output

Common

C

R

DC/DC Converter

Input

Common

Case

Ground

Output

Common

RL

Multiple units

allowed up to

rated output current.

Positive

Input

Positive

Output

The RC output is an optional

damping circuit. It is recommended in

applications where 80 volt line

transients may occur with rise times

<50 �S.

C = 6 �F Ceramic

R = 2.2 , 5%, 1/4 W, Carbon comp.

Crane Aerospace & Electronics Power Solutions

STF28-461 EMI Input Filters

Page 2 of 10

Rev A - 20070509

28 VOlT INPuT – 0.8 aMP

www.craneae.com