Soldering unleaded components

Sep 28, 2004 28 Replies

Hi All Simple (maybe) question. I've got a tin/lead plated circuit board, and some components which have plated leads without lead. Is it possible to make a good solder joint between these two? If so, what sort of solder should be used (leaded, unleaded)? TIA.


some

Have you simply tried to "tin" one of the leads with ordinary solder? Gently heat a lead and apply flux-core solder to it. If it's solderable, the solder will flow and coat (tin) the lead. If this works, you can just solder it like you would any other component.

Norm

for all electrical work you need to use *rosin* core solder...

it's ok to use the standard lead/tin solder

but silver solder should also be ok

some

a

be

I thank you both for your comments. Are there any web-based reports that investigate this process?

here is one of many links:

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btw: be sure to use good ventilation

and to wash you hands well with soap and water after handling lead

Right, err, thanks. I'm not after a guide on how to solder, but I'm looking for some/any technical articles that describe the reliability of joints made between unleaded components and leaded solder.

Because breathing lead solder fumes is bad. Also, eating lead is bad.

BRW

How many "Lead Sniffers" or "Lead Eaters" do you know, and what happened to them?

IN the over forty years I have used lead bearing solder, I have never seen or heard of anyone affected by the stuff. We all learned how to handle it.

You hold the part with your left hand, the iron with your right, and the solder in your teeth.

or

What an IDIOT! You deserve to have your brain removed, it doesn't function!

Yes. Hold either the part or the iron in your teeth; _never_ the solder.

Buy a good circuit vise that can be tilted, rotated, etc. Best thing I ever spent a lot of money on... had it now for probably 30 years.

...Jim Thompson

| James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.

seen

function!

Sanity at last!

I have three, on just for surface boards, one very small and one universal holder / vise. Also, some times you clip the iron in place and feed the solder, rolled into a plastic tube, to a part held in place with tweezers.

Surgical "clamps" (hemostats??) are handy circuit tools also.

...Jim Thompson

| James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.

seen

it.

function!

*Only* because you cannot get the full reel of solder in your mouth you have to cut off smaller pieces to use - which is wasteful when they get too short to reach the workpiece where you can see it.

However where cost is not an issue and some of the solder can be wasted (do not swallow it - in large lumps it is liable to cause a serious constipation) I recomment the multicore solders: 3 cores of rosin, one or more cores of flavouring. Raspberry is ever popular although not my personal favourite.

Many experienced 'tronics guru's swear by the deluxe solder with an anti-bacterial mouthwash in (one of) the stripes. Low activity rosin is recommended for those with many older type dental fillings.

In addition to their primary function; roach clips...

I presume you THINK your being funny. You failed to Make the point. Or are you suggesting that YOU are the one that was affected?

Ah, Yes! ROTFLMAO!

...Jim Thompson

-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | |

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| 1962 | I love to cook with wine. Sometimes I even put it in the food.

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