Subject: Re: [PSES] Surface mount resistors failing short circuit
In message
052386ecbaec46bb9a46af06a46b1...@sehste15d1be4.hs20.netmailto:052386ecbaec46bb9a46af06a46b1...@sehste15d1be4.hs20.net,
dated Mon, 17 Nov 2014, Charlie Blackham
char...@sulisconsultants.commailto:char...@sulisconsultants.com
On 11/17/2014 5:27 AM, John Woodgate wrote:
In message 052386ecbaec46bb9a46af06a46b1...@sehste15d1be4.hs20.net,
dated Mon, 17 Nov 2014, Charlie Blackham
char...@sulisconsultants.com writes:
The NRTL insist on short-circuiting the single 560R current limiting
resistor and I am unable to
In message c0b6a3945850415a954ab740399ae...@sehste15d1be4.hs20.net,
dated Mon, 17 Nov 2014, Charlie Blackham char...@sulisconsultants.com
writes:
The equipment, circuit diagrams and component specifications are
examined to determine those fault conditions that might reasonably be
expected to
Charlie,
The spacing between the pads where the SMT resistor is mounted may be so
small that the resistor failure mode doesn't matter. The creepage distance
itself may require consideration of a short between the pads as a valid
single fault condition..
Gregory H. McClure
Lexmark Product Safety
Did you do the test to see what happens? Maybe the battery drains before
there's a risk of fire??
On Nov 17, 2014, at 7:22 AM, Greg McClure
gmccl...@lexmark.commailto:gmccl...@lexmark.com wrote:
Charlie,
The spacing between the pads where the SMT resistor is mounted may be so small
that
Yes sir they can fail to a short circuit. And some do it gradually so you can
watch it happen.We were amazed and watched it over and over, having never seen
anything like it before.It started with brief pulses of over voltage in an AC
application, No DC to continue the brief arc. After the
Hello Charlie:
I suggest you go ahead with the short-circuit test. I can’t imagine a
coin-cell battery failing the criteria specified in 60950-1.
These tests shall not result in any of the following:
− chemical leaks caused by cracking, rupturing or bursting of the battery
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