TECHNET Archives

June 2015

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Ahne Oosterhof <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Ahne Oosterhof <[log in to unmask]>
Date:
Fri, 5 Jun 2015 21:37:41 -0700
Content-Type:
text/plain
Parts/Attachments:
text/plain (85 lines)
Based on the board layout it is hard to believe that in this application the output voltage is close to 300V. Under those conditions I would not trust the spacings, especially when using this board at high elevations.
You indicated the customer did not supply any information regarding the device's output voltage, so it could be 48V or less, which makes it low voltage, no precautions necessary.

Good luck,
Ahne.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of stephen gregory
Sent: Friday, June 5, 2015 18:30 PM
To: [log in to unmask]
Subject: Re: [TN] PCB High Voltage Soldering Requirements?

Let me try this again with the full images and not the thumbnail images:
http://stevezeva.homestead.com/PCB_Power_Supply_Top.jpg

|   |
|   |  |   |   |   |   |   |
|  |
|  |
| View on stevezeva.homestead... | Preview by Yahoo |  |   |


http://stevezeva.homestead.com/PCB_Power_Supply_Bottom.jpg

|   |
|   |  |   |   |   |   |   |
|  |
|  |
| View on stevezeva.homestead... | Preview by Yahoo |  |   |


Steve
      From: Steve Gregory <[log in to unmask]>
 To: [log in to unmask]
 Sent: Friday, June 5, 2015 9:55 AM
 Subject: [TN] PCB High Voltage Soldering Requirements?
   
Hi All,

I have a question regarding high voltage soldering requirements. Quoting IPC-A-610F page 1-5:

1.6.5 High Voltage - The term "high voltage" will vary by design and application. The high voltage criteria in this document are only applicable when specifically required in the drawings/procurement documentation.

So this situation is this; we built an assembly for a customer that was on a expedited turn, there were no drawings that specified anything about high voltage assembly requirements. All we had was a BOM and gerbers, and we were able to get a IPC-D-356 CAD file for our programing software. The assembly has a EMCO high voltage DC-DC converter installed on it:

http://www.emcohighvoltage.com/datasheets/hseries.pdf

The part number is H03PR, so maximum output voltage would be 300V. This is the top of the board where it is installed:

http://stevezeva.homestead.com/PCB_Power_Supply_Top_thumb.jpg

This is the bottom of the board where it is installed:

http://stevezeva.homestead.com/PCB_Power_Supply_Bottom_thumb.jpg

I was asked by production if they had to apply high voltage soldering requirements to the power supply, meaning to cut the leads of the power supply and form bulbous solder joints, and I said no. For one thing there was no customer requirement in any of the documents for us to do this, and I reasoned that the even though the power supply has a "Danger, High Voltage" label on it it was limited to 300 volts, and for some reason I seem to have it in my head that a PCB wasn't considered high voltage until it was carrying 600 volts or more.

Well, I was kind of chastised by quality for telling the operators that they didn't have to apply high voltage soldering standards to the power supply. Was I mistaken?

Steve

-- 


This email and any attachments are only for use by the intended
recipient(s) and may contain legally privileged, confidential, proprietary or otherwise private information. Any unauthorized use, reproduction, dissemination, distribution or other disclosure of the contents of this e-mail or its attachments is strictly prohibited. If you have received this email in error, please notify the sender immediately and delete the original. 


______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________


  

______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________

______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________

ATOM RSS1 RSS2