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How to decide if a heat sink is required for a Rect Bridge

 
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jskiba(at)icosa.net
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PostPosted: Sat Jun 21, 2014 9:26 pm    Post subject: How to decide if a heat sink is required for a Rect Bridge Reply with quote
Okay I have these Rect Bridge

GBPC Series<http://www.vishay.com/doc?93575>

Digikey gbpc3502a

35 amp version

I plan I using them to connect a device from two different dc batteries

To run a load of about 6 amps continuous

This is a composite airframe so no place to bolt directly to metal

1) Is a heat sink required ?

2) Would it be a good idea if one is not required

3) How do we tell how big of a heat sink we need ?

Would a digikey part number hs114 work properly ?

How can we tell ?

Thanks

Jeff.

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sprocket(at)vx-aviation.c
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PostPosted: Sun Jun 22, 2014 5:32 am    Post subject: How to decide if a heat sink is required for a Rect Bridge Reply with quote
It looks like you will only dissipate about 5 watts continuous power, which is well within the capability of the device. However, when you mount it, put about a 3x3 piece of .063 aluminum underneath as a heat spreader to protect the composite surface. Use a tiny amount of thermal grease between the case and heat spreader.
Vern

====================================================Sent from my iThing. It is responsible for all gramma and typo terrors.

On Jun 21, 2014, at 10:25 PM, "Jeffrey W. Skiba" <jskiba(at)icosa.net (jskiba(at)icosa.net)> wrote:
[quote] <![endif]--> <![endif]-->
Okay I have these Rect Bridge
GBPC Series
Digikey gbpc3502a

35 amp version


I plan I using them to connect a device from two different dc batteries
To run a load of about 6 amps continuous
This is a composite airframe so no place to bolt directly to metal

1) Is a heat sink required ?
2) Would it be a good idea if one is not required
3) How do we tell how big of a heat sink we need ?


Would a digikey part number hs114 work properly ?
How can we tell ?

Thanks
Jeff.

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