
Data Sheet
July 1999 
JW050A, JW075A, JW100A, JW150A Power Modules:
dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
Applications
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 Distributed power architectures
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 Workstations
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 Computer equipment
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 Communications equipment
Options
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 Heat sinks available for extended operation
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 Choice of remote on/off logic configuration
Features
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 Small size: 61.0 mm x 57.9 mm x 12.7 mm 
(2.40 in. x 2.28 in. x 0.50 in.)
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 High power density
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 High efficiency: 84% typical
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 Low output noise
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 Constant frequency
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 Industry-standard pinout
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 Metal baseplate
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 2:1 input voltage range
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 Overtemperature protection (100 W and 150 W only)
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 Overcurrent and overvoltage protection
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Remote sense
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Remote on/off
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Adjustable output voltage: 60% to 110% of V
O, nom
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Case ground pin
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ISO9001 Certified manufacturing facilities
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UL*
Certified, and VDE 0805 (EN60950, IEC950) 
Licensed
 1950
Recognized, 
CSA
 C22.2 No. 950-95 
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CE mark meets 73/23/EEC and 93/68/EEC
directives
*
This product is intended for integration into end-use equipment. 
All the required procedures for CE marking of end-use equip-
ment should be followed. (The CE mark is placed on selected 
products.) 
UL
CSA
 is a registered trademark of Underwriters Laboratories, Inc.
 is a registered trademark of Canadian Standards Assn.
Description
The JW050A, JW075A, JW100A, and JW150A Power Modules are dc-dc converters that operate over an input 
voltage range of 36 Vdc to 75 Vdc and provide a precisely regulated dc output. The outputs are fully isolated 
from the inputs, allowing versatile polarity configurations and grounding connections. The modules have maxi-
mum power ratings from 50 W to 150 W at a typical full-load efficiency of 84%. 
The sealed modules offer a metal baseplate for excellent thermal performance. Threaded-through holes are pro-
vided to allow easy mounting or addition of a heat sink for high-temperature applications. The standard feature set 
includes remote sensing, output trim, and remote on/off for convenient flexibility in distributed power applications.
The JW050A, JW075A, JW100A, and JW150A Power Modules 
use advanced, surface-mount technology and deliver high-
quality, efficient, and compact dc-dc conversion.