On Tue, 17 Jun 2008 22:32:39 -0700, clay wrote:

Need some help identifying several power supply capacitors that are
blown, inside a 200V DC power supply. The caps are axial (Poly film?)
and are labeled 103KV 630.

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Don't you mean 103K 630V?
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What are these? They are mounted across what appears to be a darlington
power transistor.

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I'd guess 10000pF (103) +/-10% (K) 630 volt DC (630V) caps.

No telling what the dielectric is without some more data, but I'd
guess Mylar. (polyester film)

JF