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June 11, 2007
Hand soldering process
Why is a short dwell time important for hand soldering? Why not set the iron temperature to 500 deg. F (or less!) and just heat the part longer? If the part receives the same amount of heat, are there any consequences besides labor time loss?
S.D.
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Ask the Experts Comments
June 11, 2007
A short dwell time reduces the amount of heat transferred up the lead and into the body of the component. The component load on the soldering iron is a much smaller load then the thermal load of the entire printed circuit board so a temperature of 600 – 700 F is recommended for typical soldering operations. Soldering at 500 will cause the part to overheat and create cold solder joints on the circuit board.
Edward Zamborsky, Regional Sales Manager
OK International Inc.
 Mr. Zamborsky serves as one of OK's technology advisors to the Product Development group. Ed has authored many articles, and has presented many papers on topics such as; Low Volume SMT Assembly, Solder Fume Extraction, SMT Rework, BGA Rework, Lead Free Hand Soldering, Lead Free Visual Inspection and Lead Free Array Rework.
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