 
| Mime-Version: |
1.0 |
| Content-Type: |
text/plain; charset="us-ascii" |
| Old-Return-Path: |
|
| Date: |
Tue, 01 Oct 1996 10:47:59 -0400 |
| Precedence: |
list |
| Resent-From: |
|
| Resent-Sender: |
|
| X-Status: |
|
| Status: |
O |
| X-Mailing-List: |
|
| X-Sender: |
|
| TO: |
|
| Return-Path: |
<TechNet-request> |
| X-Loop: |
|
| Received: |
by ipc.org (Smail3.1.28.1 #2)
id m0v860g-0000QzC; Tue, 1 Oct 96 09:41 CDT |
| Resent-Message-ID: |
<"th-Os3.0.skF.EsIKo"@ipc> |
| Subject: |
|
| From: |
|
| From [log in to unmask] Tue Oct 1 16: |
54:22 1996 |
| Cc: |
|
| X-Mailer: |
Windows Eudora Pro Version 2.2 (16) |
| Message-Id: |
|
| Parts/Attachments: |
|
|
Raychem Polyswitch makes a resetable fuse that is SMT and small in size.
While not as clever as a " home-made" solution, it is less risky and
more predictable.
At 07:56 AM 10/1/96 -0500, you wrote:
> I searched the ipc.org archives but didn't come up with any relevant
>hints on how to design a fusible link into a circuit board. I want to
>run a 50 mil trace but neck it down to some value for about 200 mils so
>that if overcurrent is applied I'll know where it'll blow. This would
>be such a rare occasion that a fuse is not warranted nor practical due
>to high voltage, >1000.
> Does anyone have any idea on how to tackle this? What calculations
>should I use to determine when the neck down will fry? The IPC curves
>are very conservative in our experience. I want it to blow not glow?
>:-) Remember that the nearby 50 mil trace will heatsink the neck down
>to some extent.
> Thanks for any input. Any replies direct to me will be concatenated
>and disseminated over TechNet unless otherwise requested.
>
>George Uptain - Schlumberger Well Services
>512-331-3183
>Austin, Texas
>
>***************************************************************************
>* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
>***************************************************************************
>* To unsubscribe from this list at any time, send a message to: *
>* [log in to unmask] with <subject: unsubscribe> and no text. *
>***************************************************************************
>
>
Mike Wilson 1777 Sentry Parkway West
Business Development Manager Dublin Hall Suite 407
Praegitzer Design Blue Bell, PA 19422
Ph: 215-646-7710 Fx: 215-646-7753 email: [log in to unmask]
***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To unsubscribe from this list at any time, send a message to: *
* [log in to unmask] with <subject: unsubscribe> and no text. *
***************************************************************************
|
|
|
