Content-type: |
text/plain |
Sender: |
|
Subject: |
|
From: |
|
Date: |
Thu, 10 Dec 1998 14:40:11 -0700 |
MIME-version: |
1.0 |
X-To: |
|
Reply-To: |
|
Parts/Attachments: |
|
|
Look in IPC-D-275. There is a section on fastening these kind of parts with
over 3 grams. Section 4.1.8.2, I think is the section. Hope this helps!
> ----------
> From: Donald Cole[SMTP:[log in to unmask]]
> Sent: Thursday, December 10, 1998 1:33 PM
> To: [log in to unmask]
> Subject: [TN] Mechanical Fastening of "heavy" components
>
> Hi all,
> I am wondering if anyone can help me out! I am trying to find any
> reference to a specification which states when a component is of a
> certain mass, it needs to be fastened to the PCB by other means than its
> solder joints (i.e. adhesive or mechanical fastening). I know the old
> MIL-STD-2000A specification did state that if a component is 0.25 ounce
> (7.1 grams) or more per lead than it must be supported by approved means
> to ensure joints are not relied upon for mechanical support. I am being
> told that a similar clause exists in either the IPC (ANSI/J-STD-001B or
> ANSI/IPC-A-610) standards or BellCore GR-78-CORE. I have search these
> and cannot seem to find any reference to this. Am I missing something,
> or does such a clause exist somewhere else? The specific case I have is
> a DC-DC power converter which weighs 3 oz. (85 grams) and has 9 thru
> hole leads (0.040" dia.). We currently work to Bellcore and IPC
> specifications. Is there a requirement to fasten this power converter
> to the PCB with screws? Any input would be greatly appreciated.
>
> Thanks
> dc
>
> ################################################################
> TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
> ################################################################
> To subscribe/unsubscribe, send a message to [log in to unmask] with
> following text in the body:
> To subscribe: SUBSCRIBE TechNet <your full name>
> To unsubscribe: SIGNOFF TechNet
> ################################################################
> Please visit IPC's web site (http://www.ipc.org) "On-Line Services"
> section for additional information.
> For technical support contact Hugo Scaramuzza at [log in to unmask] or
> 847-509-9700 ext.312
> ################################################################
>
################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe: SUBSCRIBE TechNet <your full name>
To unsubscribe: SIGNOFF TechNet
################################################################
Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################
|
|
|