Where to find radial wire-wound power resistors?

D

DaveC

Guest
Ceramic wire-wound 10-watt 220-ohm 5-percent radial power resistor with 0.50
inch (12.5 mm) lead spacing.

Išm flexible on the lead spacing if I can just find a supplier (preferably in
USA).

The original is a Cinetech SQF10W but I canšt find domestic inventory.

Thanks,
Dave
 
> The original is a Cinetech SQF10W but I canšt find domestic inventory.

http://www.cinetech.com.tw/upload/2011/03/20110330170655.pdf
 
"DaveC" <invalid@invalid.net> wrote in message
news:0001HW.D0295C2401919D7CB02919BF@news.eternal-september.org...
Ceramic wire-wound 10-watt 220-ohm 5-percent radial power resistor with
0.50
inch (12.5 mm) lead spacing.

Išm flexible on the lead spacing if I can just find a supplier (preferably
in
USA).

The original is a Cinetech SQF10W but I canšt find domestic inventory.

Thanks,
Dave
Click to expand...
The spec sheet says that range from .1 to 1 ohm. These are used as current
sense resistors. 220 ohms at 10 watts will be much bigger. You sure you
don't want .22 ohms?
 
On 2014-09-01, DaveC <invalid@invalid.net> wrote:

Ceramic wire-wound 10-watt 220-ohm 5-percent radial power resistor
with 0.50 inch (12.5 mm) lead spacing.
....
The original is a Cinetech SQF10W but I canšt find domestic inventory.

http://www.cinetech.com.tw/upload/2011/03/20110330170655.pdf
Click to expand...

I don't think so, that data sheet says the SQF series is flat, not
wound and it only goes upto 1 ohm.

--
umop apisdn


--- news://freenews.netfront.net/ - complaints: news@netfront.net ---
 
The spec sheet says that range from .1 to 1 ohm. These are used as current
sense resistors. 220 ohms at 10 watts will be much bigger. You sure you
don't want .22 ohms?
Click to expand...

Aagh! Neither--it's 22.0 ohms.

Thanks for challenging me.

i found it at Newark, pn 40M8806.

thanks.
 
http://www.cinetech.com.tw/upload/2011/03/20110330170655.pdf

I don't think so, that data sheet says the SQF series is flat, not
wound and it only goes upto 1 ohm.
Click to expand...

Thank you for that observation Jason.

But that's the only SQF power resistor reference I could find.

Here's images of the remains of the original:

oi60.tinypic.com/vmujo1.jpg

oi62.tinypic.com/wgzqdj.jpg

(Note correction in an earlier post that it's 22 ohm not 220.)

Surprising (to me) there is a 10A fuse in there between two 11 ohm (?)
resistors!

Now quite confused...

Suggestions?

Thanks.
 
Here's images of the remains of the original:

oi60.tinypic.com/vmujo1.jpg

oi62.tinypic.com/wgzqdj.jpg
Click to expand...

A remnant of the cerment (c; case says "TYH", although no pn.
 
TT Electronics (irctt.com) might be the manufacturer. They have SQM and CVF
series resistors but a search for SQF turns up nada:

irctt.com/file.aspx?product_id=305&file_type=datasheet

For what it's worth the markings are not similar at all. (I find that
manufacturers like to stick with similar font and color and such.)

The internal fuse is clearly labeled 10A and 185c. Not sure if this means
it's only a thermal fuse rated at a maximum of 10A or it's a current fuse
rated at a maximum of 185c or if it's a thermal and current fuse.

Either way it's apparently more than just a resistor.

Suggestions?

Thanks.
 
To summarize:

Wire-wound cermet, radial-lead 22.0 ohm, 10 watt, 5 percent, thermally-fused
@ 185c / 10A.

The original is a labeled SQF10W but I canšt find any reference to this
series. TT Electronics (irctt.com) might be the manufacturer. They have SQM
and CVF series resistors but a search for SQF turns up nada:

irctt.com/file.aspx?product_id=305&file_type=datasheet

Here's images of the remains of the original:

oi60.tinypic.com/vmujo1.jpg

oi62.tinypic.com/wgzqdj.jpg

The internal fuse is clearly labeled 10A and 185c. Not sure if this means
it's only a thermal fuse rated at a maximum of 10A or it's a current fuse
rated at a maximum of 185c or if it's a thermal and current fuse.

Either way it's apparently more than just a resistor.

Help!!

Cheers.
 
On Mon, 1 Sep 2014 12:09:39 -0700, the renowned DaveC
<invalid@invalid.net> wrote:

To summarize:

Wire-wound cermet, radial-lead 22.0 ohm, 10 watt, 5 percent, thermally-fused
@ 185c / 10A.

The original is a labeled SQF10W but I canšt find any reference to this
series. TT Electronics (irctt.com) might be the manufacturer. They have SQM
and CVF series resistors but a search for SQF turns up nada:

irctt.com/file.aspx?product_id=305&file_type=datasheet

Here's images of the remains of the original:

oi60.tinypic.com/vmujo1.jpg

oi62.tinypic.com/wgzqdj.jpg

The internal fuse is clearly labeled 10A and 185c. Not sure if this means
it's only a thermal fuse rated at a maximum of 10A or it's a current fuse
rated at a maximum of 185c or if it's a thermal and current fuse.

Either way it's apparently more than just a resistor.

Help!!

Cheers.
Click to expand...

The thermal cutoff looks like a standard type rated at 10A that will
open up permanently at 185°C.

Similar to these:
http://www.koaspeer.com/products/resistors/leaded-resistors/wf/

or this:
http://industrial.panasonic.com/www-data/pdf/AOB0000/AOB0000CE8.pdf

or this:
http://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Data+Sheet%7F1-1773455-9%7FB%7Fpdf%7FEnglish%7FENG_DS_1-1773455-9_B.pdf%7F1879738-1

Given the combination of the (rare in North America) vertical WW
cement resistor and cutoff temperature values this looks like the kind
of part that's easy enough to source in volume but almost impossible
in small quantities.

Also it's a safety device. You might be best off (or at least safest)
approaching the OEM for a repair part. There's clearly something else
major wrong, so it may not be worth fixing.

You could try to cobb something together out of a couple 5W resistors
and a thermal cutoff with some ceramic cement, at your own risk, of
course.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
On Mon, 01 Sep 2014 16:00:58 -0400, Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote:

Also it's a safety device. You might be best off (or at least safest)
approaching the OEM for a repair part. There's clearly something else
major wrong, so it may not be worth fixing.
Click to expand...

P.S.

Here's what this sort of thing probably looks like before it's blown
up.. note all the safety agency markings:

http://cfnewsads.thomasnet.com/images/medium/544/544771.jpg




Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
Given the combination of the (rare in North America) vertical WW
cement resistor and cutoff temperature values this looks like the kind
of part that's easy enough to source in volume but almost impossible
in small quantities.
Click to expand...

So I see!

Also it's a safety device. You might be best off (or at least safest)
approaching the OEM for a repair part. There's clearly something else
major wrong, so it may not be worth fixing.
Click to expand...

It was due to a wiring fault, since cleared up. I bypassed the fuse and the
uint powers up and looks to be OK.

You could try to cobb something together out of a couple 5W resistors
and a thermal cutoff with some ceramic cement, at your own risk, of
course.
Click to expand...

If I was going to use this, for example, on my bench as a diagnostic tool
where I would have a hand on The Switch when it was being operated, I'd have
no qualms about cobbing together such a safety device. But for sale and
installation into a user's business--no way.

So it's kinda critical I get a replacement somehow. I'll contact those
manufacturers you mentioned and ask for samples. The equipment manufacturer
said that to repair this unit (the wiring fault is a common field install
error) would cost more than a new unit. Clearly marketing spin and or
outright lie, we now know. I'll ask about a replacement but not hopeful...

Thanks, SP for your insight.

Bests,
Dave
 
This is the item. It's on a Taiwanese auction site:

http://goods.ruten.com.tw/item/show?21106267141304

Even with Google Translate it's not easy to understand how to go about a
transaction.

Has anyone use this "pinkciao" site? Do I need to register?

(Do I see e-Bay ownership here?)

This is the only reference I've found for this part anywhere so I need to get
a few.

Help?

Thanks.
 
On 2014-09-03, DaveC <invalid@invalid.net> wrote:
This is the item. It's on a Taiwanese auction site:

http://goods.ruten.com.tw/item/show?21106267141304

Even with Google Translate it's not easy to understand how to go about a
transaction.

Has anyone use this "pinkciao" site? Do I need to register?
Click to expand...

the button that looks most like a buy button takes me to a page called
/user/login.htm so I guess you do need to register.
registration needs a Taiwanese cell phone number - can't start with +

> (Do I see e-Bay ownership here?)

I see this: "Copyright©　PChome eBay Co., Ltd."

I found this.

http://www.tyohm.com.tw/product/fusible%20sqf.htm
http://www.tyohm.com.tw/Default_e.aspx

maybe you can get "samples"

--
umop apisdn


--- news://freenews.netfront.net/ - complaints: news@netfront.net ---
 
I found this.

http://www.tyohm.com.tw/product/fusible%20sqf.htm
http://www.tyohm.com.tw/Default_e.aspx

maybe you can get "samples"
Click to expand...

Thank you Jasen. Stellar work!

I've contacted them for samples / purchase. Fingers crossed...

Cheers!
 
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