RE: DC Fuse for Power Supply

[Dick Grobner]

They are in the Schurter catalog dated 10/99, pages 144 - 155
Good Luck!

-Original Message-
From: jrbar...@lexmark.com [mailto:jrbar...@lexmark.com]
Sent: Wednesday, October 25, 2000 1:50 PM
To: dmck...@gte.net; emc-p...@majordomo.ieee.org
Subject: DC Fuse for Power Supply



Doug,
I ran into a problem in 1990 where we needed to add a primary fuse to a
brick
power supply, without changing the circuit board or the case.  We had two
holes
in the circuit board where we could install a pigtailed fuse if we could
find
one that would meet UL and SEMKO requirements.  (SEMKO did not allow
soldered-on
pigtails on primary fuses).   Our solution, and I have yet to see a better
alternative, was to buy 5mm x 20mm fuses from Schurter with push-on endcaps.
These endcaps have the lead wires welded on, meeting the word and the spirit
of
the EMKO Deviations that applied at that time.  Since no heat is applied
when
these endcaps are installed on the fuses, they have no effect on their
electrical characteristics.

I've given my Schurter catalog to the engineer who's taken over
specifying/qualifying power supplies from me, so I don't have the part
number
handy, and I don't know if these fuses are available in the rating you need.
But this, or something like this, might get you out of your bind.
  John Barnes  Advisory Engineer
  Lexmark International



---
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.

To cancel your subscription, send mail to:
 majord...@ieee.org
with the single line:
 unsubscribe emc-pstc

For help, send mail to the list administrators:
 Jim Bacher:  jim_bac...@mail.monarch.com
 Michael Garretson:pstc_ad...@garretson.org

For policy questions, send mail to:
 Richard Nute:   ri...@ieee.org


---
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.

To cancel your subscription, send mail to:
 majord...@ieee.org
with the single line:
 unsubscribe emc-pstc

For help, send mail to the list administrators:
 Jim Bacher:  jim_bac...@mail.monarch.com
 Michael Garretson:pstc_ad...@garretson.org

For policy questions, send mail to:
 Richard Nute:   ri...@ieee.org

DC Fuse for Power Supply

[jrbarnes]

Doug,
I ran into a problem in 1990 where we needed to add a primary fuse to a brick
power supply, without changing the circuit board or the case.  We had two holes
in the circuit board where we could install a pigtailed fuse if we could find
one that would meet UL and SEMKO requirements.  (SEMKO did not allow soldered-on
pigtails on primary fuses).   Our solution, and I have yet to see a better
alternative, was to buy 5mm x 20mm fuses from Schurter with push-on endcaps.
These endcaps have the lead wires welded on, meeting the word and the spirit of
the EMKO Deviations that applied at that time.  Since no heat is applied when
these endcaps are installed on the fuses, they have no effect on their
electrical characteristics.

I've given my Schurter catalog to the engineer who's taken over
specifying/qualifying power supplies from me, so I don't have the part number
handy, and I don't know if these fuses are available in the rating you need.
But this, or something like this, might get you out of your bind.
  John Barnes  Advisory Engineer
  Lexmark International



---
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.

To cancel your subscription, send mail to:
 majord...@ieee.org
with the single line:
 unsubscribe emc-pstc

For help, send mail to the list administrators:
 Jim Bacher:  jim_bac...@mail.monarch.com
 Michael Garretson:pstc_ad...@garretson.org

For policy questions, send mail to:
 Richard Nute:   ri...@ieee.org