3up/3 down and variation
These types of sets commonly used.They are regarded as the most reliable set styles.TV,monitor and consumer manufacturers often specify variations of this styles.the petals facing the PC board insure satisfactory mechanical bond with the Pc board,and the fluted petals encourage good solder wicking.Since these sets do not obscure the PC board holes,solder gasses are properly released resulting in solder joint with minimal voids.
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