Thank you for your reply.
1) As I explained in my response to you:
I already realize that 0.47 uF can be substituted for 0.5 uF: If a capacitor has a nominal value of 0.5 uF and it has a tolerance of say 10% or 20%, the actual value of an individual capacitor of that type could be as low as 0.4 uF or as high as 0.6 uF with the latter tolerance and between 0.45 uF to 0.55 uF with the former. Since 0.47 uF lies within those bounds, reasonably, I would expect it to work.
2) “There is no point of any kind in even looking…”, you write.
- Respectfully, I disagree. Farnell in the UK even supplies a 0.47 uF 630 Volt capacitor. As far as the electronics goes, that will be fine, and the maximum voltage rating is even closer to that specified by the designer, (not that, under the circumstances, the maximum voltage rating is the problem). However, there exist two intractable difficulties:
a) this capacitor is described thus: “U.S. stock: Delivery charge £15.95 once per order”. For a capacitor which costs only £2.37 (+ 20% Vat ) this seems quite an uneconomical proposition. Especially considering that I require only a couple of them now.
b) Regardless of the U.S. stock delivery charge, Farnell UK also has a minimum order value of c. £30, below which a surcharge of c. £5 is made. Despite having nothing in particular against Farnell UK, I would rather not hand them £5 free of charge.
Hence, to make the proposition viable in the financial sense, I would really rather wait until I have an order of at least £30 in which I could include the capacitors, either the 0.47 uF 1000 volt, or the 0.47 uF 630 volt. The latter, of course, attracting the U.S. stock delivery charge which would push the cost even higher.
We may conclude, therefore, that there is certainly a “point” in looking: a source alternative to Farnell UK might provide these components without incurring a surcharge or demanding a minimum order value. - I could get them more quickly if all I need to pay for is the capacitors themselves and maybe a smaller delivery charge.
Moreover, you may agree, it is seldom a bad thing to have greater choice among vendors…
The third reason for looking is, of course, curiosity: I wonder if these things are still around.
Thank you for your contribution.
- Analogue.