Mounting circuit components in fuse holders facilitates component changing and extends component life with an estimated fifty percent saving of breadboard test time. Glass sleeves of the fuse holders allow easy component identification

Winslow, D. J.

English

NASA Technical Reports Server

April 1970
	 .	
.	 Brief 70-10191 
NASA TECH BRIEF 
NASA Tech Briefs announce new technology derived from the U.S. space program. They are issued to encourage commercial 
application. Tech Briefs are available on a subscription basis from the Clearinghouse for Federal Scientific and Technical 
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be directed to the Technology Utilization Division, NASA, Code UT, Washington, D.C. 20546. 
Fuse-Holder Concept Expedites Electronic Component Changes 
Miniature Component in 3AG Type Fuse Case 
LtIIIIIH 
Three Terminal Device Molded Into Cartridge Fuse Shape 
Circuit design and associated bread-boarding ,
 often 
demand rapid changes of circuit components. Mount-
ing such components in fuse holders would facilitate 
component changing and extend component life. Once 
an inventory is built up, no component replacement 
would be necessary except for worn or burned-out 
items. It is estimated that 50 % of bread-board 
test time could be saved by adoption of this method.
The proposal is that such components as diodes, 
resistors, capacitors, thermistors, etc., be mounted 
in standard fuse holders with the appropriate holding 
clips mounted on the printed-circuit board or bread-
board. 
The glass sleeves of the fuse holders facilitate com-
ponent identification. For heat-generating resistors 
that require radiation., only the end caps of the fuse 
holders need be used. A guide to the heat generated 
by a resistor is its power consumption; if it is operated 
near rated capacity, it will generate maximum heat. 
Three-contact devices such as transistors could be 
configurationfabricated in the cartridge figuratio with a con-
tact band in-the center. 
Note: 
This development is in the conceptual stage only. 
No further documentation is available. 
Patent status: 
No patent action is contemplated by NASA. 
Source: David J. Winslow 
Marshall Space Flight Center 
(MFS-20615) 
Category 01 
This document was prepared under the sponsorship of the National 
Aeronautics and Space Administration. Neither the Uniteçi States 
Government nor any person acting on behalf of the United States
Government assumes any liability resulting from the use of the 
information contained in this document, or warrants that such use 
will be free from privately owned rights.
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Fuse-holder concept expedites electronic component changes

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