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Old 30th October 2006, 12:23 PM   #21
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Default Can I use this 22uf cap from PartsExpress...?

This one is 22uf 250v - does the voltage rating matter here?

here

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Old 30th October 2006, 05:28 PM   #22
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22uf/250V. Higher voltage is ok, but it might be too big to fit.
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Old 30th October 2006, 05:38 PM   #23
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Default Polarized or not?

I found some smaller 22uf 100v on Partsexpress but I need to know if the UcD180 snubbers are polarized. If so how do I orient them on the board?

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Old 31st October 2006, 12:16 AM   #24
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Update.....

I've found a source for the Philips ZT2907A - www.rswww.com.au has them for around $1.15ea (min 5+).

Still unsure about D2 specs or orientation - can anyone suggest a replacement substitute on a UcD180?
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Old 31st October 2006, 08:25 AM   #25
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Quote:
Originally posted by Silver Stealth
Update.....

I've found a source for the Philips ZT2907A - www.rswww.com.au has them for around $1.15ea (min 5+).

Still unsure about D2 specs or orientation - can anyone suggest a replacement substitute on a UcD180?
I think D2 is a 12v smd zener diode in a SOT-23 package, have a search on RS for BZX84-C12, I'd check with Hypex first to be sure
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Old 31st October 2006, 09:03 AM   #26
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Thanks very much for the suggestion - yep these are $0.16 min qty 50 (A$8). Email through the hypex website to check the component?

Incidentally how did you know this??? He he he...
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Old 31st October 2006, 09:13 AM   #27
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Quote:
Originally posted by Silver Stealth
Thanks very much for the suggestion - yep these are $0.16 min qty 50 (A$8). Email through the hypex website to check the component?

Incidentally how did you know this??? He he he...
No problem, glad I could help

I removed one of my UCD180's and had a look at the components, D2 is in the regulation circuit for the input op-amp supply, I think its the +V supply
Farnell may have them in smaller qty's, might save you buying 50 of the things
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Old 31st October 2006, 09:23 AM   #28
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Hey I see is it "2F" on the top of the device - however if so this doesn't correlate with the data sheet - a BZX84-C12 should have a code Y2*. Can you read this code on yours? And D1 looks the same (which isn't blown up) - do you concur?
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Old 31st October 2006, 09:38 AM   #29
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Quote:
Originally posted by Silver Stealth
Hey I see is it "2F" on the top of the device - however if so this doesn't correlate with the data sheet - a BZX84-C12 should have a code Y2*. Can you read this code on yours? And D1 looks the same (which isn't blown up) - do you concur?

Yes mine also says Y2, I've measured it and it reads 11.97v DC, it has a 15k resistor which biases it.
Have a look here at the part which is the 16th down, its code is Y2 and is a BZX84-C12 12v 300mW zener http://www.tkb-4u.com/code/smdcode/smdcodeY.php

They are the same device on both the positive and negative supply, only difference is their orientation
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Old 31st October 2006, 09:45 AM   #30
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Try order code 931640 at Farnell
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