a google on pn200 equivalent
will bring you lots of info.
its a bipolar PNP, so nothing to do with a mosfet.
spec is TO92 case
IC continuous 500mA
it seems to be a general purpose pnp transistor, so anything will do, as long as its got a 500mA current rating.
obviously the pinout must be the same
a datasheet link is at http://www.alldatasheet.com/datasheet-pdf/pdf/54291/FAIRCHILD/PN200.html
hope this helps
p.s., at the age of 62, its great to be called a "junior member", 'cos my willy is also 62 !!!!!