标题: 关于接点的机械固定 [打印本页] 作者: charlie800 时间: 2011-11-2 23:12 标题: 关于接点的机械固定 刚才看UL1727的关于焊接的要求是：
18.3.3 With reference to 18.3.2, a lead is considered mechanically secure when one or more of the
following conditions are met:
a) The lead has at least one full wrap around a terminal.
b) The lead has at least one right-angle bend when the lead is passed through an eyelet or
opening.
Exception: On a printed-wiring board that is soldered by a machine process in which the
soldering time and solder temperature are automatically controlled, bending over of a lead after it
has been passed through a hole in the board is not required.
c) The lead is twisted with one or more conductors.
d) The lead is strapped in place, or the equivalent, adjacent to the soldered connection to hold
the lead end in place.