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This is obviously a trivia question but I think is related to product safety.
My recollection is that early on, some manufacturers designated white
body optocouplers as the only type that had certain attributes, like
agency approvals.
It would seem that a white body would be more translucent and you risk
falsely triggering the transistor.
-Doug
Doug Powell
Advanced Energy Industries Inc.
Fort Collins, Colorado USA
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Title: Why are some optocouplers white and some black?
This is obviously a trivia question but I think is related to product
safety.
My recollection is that early on, some manufacturers designated white
body optocouplers as the only type that had certain attributes, like
agency approvals.
It would seem that a white body would be more translucent and you risk
falsely triggering the transistor.
-Doug
Doug Powell
Advanced Energy Industries Inc.
Fort Collins, Colorado USA
-
----------------------------------------------------------------
This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list. Website: http://www.ieee-pses.org/
To post a message to the list, send your e-mail to [email protected]
Instructions: http://listserv.ieee.org/request/user-guide.html
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas [email protected]
Mike Cantwell [email protected]
For policy questions, send mail to:
Jim Bacher: [email protected]
David Heald: [email protected]
All emc-pstc postings are archived and searchable on the web at:
http://www.ieeecommunities.org/emc-pstc
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