Ceramic, Polystyrene & tantalum caps replacement

[gkmaia]

I would like to replace a few capacitors and do not have all the right type as per boom but would like to check if they will perform as intended.

Note that some of the original caps are rated 100, 500 or 600v but the voltage on the block where these caps sit won’t exceed 50v.

Replace
680p 630v Polystyrene (sty)
for
680p 100v Polyester mylar plastic film (green cap)

Replace
100nf 63v single-layer ceramic (NPO CDS)
For
100nf 1kv single layer ceramic high voltage

Replace
3300p 50v single-layer ceramic (NPO CDS)
For
3300p 100v Polyester mylar plastic film (green cap)

Replace
470nf 35v tantalum
For
0.47uf 50v electrolytic cap

[Jwillis]

Depends. Different types of caps of similar rating respond differently with frequency and application.

[dmills]

I am suspicious of a 100nF C0G, nice part, but it is a little specialist.

In general C0G are (above tiny values) only used for a reason, and something as out there as a 100nF of C0G would be the sort of thing anyone would try hard to design out if they could (It exists, but is physically quite large (1206, never happymaking in ceramic caps, and relatively expensive), it is probably there for a reason (If you have identified that part correctly).

WHY are you replacing these, apart possibly from that tant there is noting there where your replacement is likely to be an improvement in ANY parameter that matters, and even the tant may be the appropriate choice depending on the circuit, and most of these parts would be the last places I would look for a problem.

Regards, Dan.