|
Sponsor
|
|
Simply Double the Production Volume
SEHO SelectLine features the award-winning Synchro and SmartSplit production modes that allow to halve cycle times in batch production and mixed operation. Find out more.
SEHO Systems GmbH
|
|
|
Sponsor
|
|
iX7059 SMT Edition: Next-Gen 3D X-ray
Experience high-precision inline 3D X-ray inspection by Viscom with AI-powered defect detection, exceptional image quality, and reliable performance for complex SMT assemblies.
Viscom SE
|
|
| Ask the Experts |
|
QUESTIONS
SUBMIT
MEMBERS
JOIN
|
April 8, 2014 - Updated
April 2, 2014 - Originally Posted
Minimum Component Lead to Lead Spacing for Wave Soldering
What is the recommended minimum lead to lead spacing for through hole components run through a wave soldering system? Would the spacing be different for lead-fee solder compared to leaded solder?
V.P.
|
| Expert Panel Responses |
Theminimum practical pitch for multi-lead components such as connectors is about1.27mm (0.050�); I have not personally dealt with any with smaller pitches. Itis in theory possible to do smaller pitches, but the required hole diameter,and thus the maximum lead size, becomes very small. Pad sizes are also severelylimited, which will affect soldering performance. The small hole alsorepresents a problem for getting flux penetration and hole fill. The minimum pitch should not be different for Pb-free vs. SnPb. Ineither case, it is necessary to tightly control lead protrusion to reduceshorting risk. It is potentially more critical with Pb-free due to the highersolder surface tension.
Fritz Byle
Process Engineer, Astronautics
Fritz's career in electronics manufacturing has included diverse engineering roles including PWB fabrication, thick film print & fire, SMT and wave/selective solder process engineering, and electronics materials development and marketing. Fritz's educational background is in mechanical engineering with an emphasis on materials science. Design of Experiments (DoE) techniques have been an area of independent study. Fritz has published over a dozen papers at various industry conferences.
|
|
|
Free Newsletter Subscription
Circuitnet is built for professionals who bear the responsibility of looking ahead, imagining the future, and preparing for it.
Insert Your Email Address
|
|
Sponsor
|
|
EZ-FLO High Precision Dispense Tips
Each needle is machined from solid stainless steel as opposed to rolled tubing. The resulting smoother internal profile enhances material flow and consistency. Learn more.
DL Technology
|
|
|
