22 Feb
2011
22 Feb
'11
10:54 a.m.
You might have heard the rule of thumb that "in
the case of an overcurrent
fault, the most expensive component in the circuit will burn out to protect
the fuse". That rule is only slightly facetious. In reality almost any comp=
I always heard it as 'A transistor protected by a fast-acting fuse will
protect the fuse by blowing first'. However, I've always found that a
transisotr protected by an expensive fast-acting fuse will always fail
short-circuit, thus ensuring the fuse blows too...
-tony