> Aren't these switches known as "Make-Before-Break" and
Yes, that's another name in technical descriptions. In
catalogs and by manufacturers (at least on this side of the
pond) they are more commonly called "shorting" and
"non-shorting" rather than the "make before break".
For example Centralab uses "shorting" to describe a "make
before break" contact. Non-shorting is used in their
catalogs to describe "break before make".
Amp Supply was big on ordering the wrong switch. What they
wanted was "pick up and hold" design but with "non-shorting"
contacts. What they always seemed to order was a "shorting"
You have to be very careful to look at what the manufacturer
does, but in general (at least in the USA) the term
"shorting" means make before break. That generally means the
switch has much lower contact to contact voltage holdoff on
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