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Arcol aluminum encased resistors...
Arcol aluminum encased resistors...
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Old 4th January 2008, 03:51 AM   #1
gbeard is offline gbeard  United States
diyAudio Member
Join Date: Dec 2007
Default Arcol aluminum encased resistors...

I am new here and a newbie diy'er. I did a search, but have not found an anwer to the following question.

I just pulled some parts from an old UPS system (circa 1993) including a few Arcol Aluminum encased power resistors with cable terminations. I looked them up but was unable to find their specific model number. They resemble the current HS series and measure similarly to a HS50 although the top of the body is square rather than round.

Can anyone here identify it's power rating?

On the front:

ARCOL 90.51 (could be an I instead of a 1)
A118-3/15R =/-5%

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Old 5th January 2008, 11:40 AM   #2
AndrewT is offline AndrewT  Scotland
diyAudio Member
Join Date: Jul 2004
Location: Scottish Borders
if it's a similar size to the HS50 then it probably has a similar power rating.
However, continuous power dissipation at the maximum rating will need a big or a fanned heatsink.
regards Andrew T.
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Old 5th January 2008, 12:38 PM   #3
gbeard is offline gbeard  United States
diyAudio Member
Join Date: Dec 2007
I suspected that might be the case.

Thank you for taking the time to reply.
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