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tech / sci.electronics.design / Re: Tinned leads and tin whiskers

Tinned leads and tin whiskers

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From: sala.n...@mail.com (LM)
Newsgroups: sci.electronics.design
Subject: Tinned leads and tin whiskers
Date: Sat, 05 Jun 2021 18:21:32 +0300
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by: LM - Sat, 5 Jun 2021 15:21 UTC

Re: Tinned leads and tin whiskers

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From: rmower...@charter.net (Ralph Mowery)
Newsgroups: sci.electronics.design
Subject: Re: Tinned leads and tin whiskers
Date: Sat, 5 Jun 2021 11:46:25 -0400
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by: Ralph Mowery - Sat, 5 Jun 2021 15:46 UTC

In article <nf5nbgl6ri6kfn1323qjv1ignbdes696pv@4ax.com>,
sala.nimi@mail.com says...
>
> Manufacturers tell that their components have tinned leads or even
> pure tin coating. I wonder is it really so, and what about those
> whiskers. Planned obsolence?
>
>

Most of the time the tinned leads of old were a solder mix of tin and
lead. No problems. The pure tin parts are usually where the tin
whiskers come in.

Maybe some of the newer lead free solder has the whiskers.

Re: Tinned leads and tin whiskers

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From: prese...@MUNGEpanix.com (Cydrome Leader)
Newsgroups: sci.electronics.design
Subject: Re: Tinned leads and tin whiskers
Date: Sat, 5 Jun 2021 20:33:47 +0000 (UTC)
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by: Cydrome Leader - Sat, 5 Jun 2021 20:33 UTC

Ralph Mowery <rmowery42@charter.net> wrote:
> In article <nf5nbgl6ri6kfn1323qjv1ignbdes696pv@4ax.com>,
> sala.nimi@mail.com says...
>>
>> Manufacturers tell that their components have tinned leads or even
>> pure tin coating. I wonder is it really so, and what about those
>> whiskers. Planned obsolence?
>>
>>
>
> Most of the time the tinned leads of old were a solder mix of tin and
> lead. No problems. The pure tin parts are usually where the tin
> whiskers come in.
>
> Maybe some of the newer lead free solder has the whiskers.

The joints just crack first, so shorting isn't a problem.

Subject	Author
Tinned leads and tin whiskers	LM
Re: Tinned leads and tin whiskers	Ralph Mowery
Re: Tinned leads and tin whiskers	Cydrome Leader