I think this extrapolation of yours is a bit over the top: I don't know of caps having 0.05 tol and suffix A (which means nothing BTW), but each manufacturer uses non reserved letters for his own purpose: in this case, since the marked value is (theoretically) 309pF, the tolerance might be +/-1pF.
That is just an example, sometimes the tolerance is asymetrical, etc.
Your best bet is to find the original Siemens datasheet, with the marking codes explained
Siemens code is %.
e.g. A = 0.05%, F= 1%, H = 2.5%
Used for B31531/21 radial box series KS, and B31063 axial KS.
Standard for B31531 is 1%, is the type in the picture, closer tolerance on special order.
(<= has the Siemens datasheets and foil & electrolytic cap catalog since the '80s)
e.g. A = 0.05%, F= 1%, H = 2.5%
Used for B31531/21 radial box series KS, and B31063 axial KS.
Standard for B31531 is 1%, is the type in the picture, closer tolerance on special order.
(<= has the Siemens datasheets and foil & electrolytic cap catalog since the '80s)
Siemens styroflex caps. are "polarized", vertical black line end(after A) should be always soldered to gnd. to minimize hum pickup.
On axial stiroflex coloured ring side is gnd. end. Modern manufacturers do not care much about film capacitors "polarity".
On axial stiroflex coloured ring side is gnd. end. Modern manufacturers do not care much about film capacitors "polarity".
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