ceramic capacitor voltage
Hello all,
this might be a bit off topic, however is there a (easy or not) way to tell the working voltage of a ceramic disc capacitor? I have tons of these surplus or saved capacitors but often the working voltage is marked when equal or higher than 1 kV. When I have to reuse a capacitor in a high but not so high voltage circuit (let's say 200 Vdc) I never know how to find the correct size or how to measure the insulation voltage of the capacitor. Fortunately film capacitor have a clear marking :-) Best regards Francesco IS0FKQ |
ceramic capacitor voltage
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ceramic capacitor voltage
|
ceramic capacitor voltage
ha scritto: wrote: Hello all, this might be a bit off topic, however is there a (easy or not) way to tell the working voltage of a ceramic disc capacitor? I have tons of these surplus or saved capacitors but often the working voltage is marked when equal or higher than 1 kV. When I have to reuse a capacitor in a high but not so high voltage circuit (let's say 200 Vdc) I never know how to find the correct size or how to measure the insulation voltage of the capacitor. Fortunately film capacitor have a clear marking :-) Best regards Francesco IS0FKQ my first q is to check that youre familiar with the voltage codes used on ceramics. V rating is indicated by one letter or number. If so, and I'm not sure about these codes, often on ceramics I see only 3 numbers and one letter and I assume the one letter is the tolerance code (M, Z often). Other have someting like 103P with an E on top and 82 lower in the disc. Others have YY on top and usual capacity code on a lower line. In short the answer is no, I haven't been able to find good references about all markings, so if anyone has good sources for learning these codes please share them! As for the destructive test, yes, it's an option, so if other else fails, I'll test them this way. Thanks! Francesco IS0FKQ |
ceramic capacitor voltage codes
Capacitor Voltage Rating codes:
1 = 100V 3 = 25V 4 = 4v 5 = 50V 6 = 6.3V 8 = 400V 9 = 5v -- ? 9 = 300V -- ? * = 75V A = 1000V C = 600V/630V E = 150V F = 63V G = 2000V H = 3000V J = 4000V K = 5000V S = 1500V V = 250V W = 2500V X = 350V Y = 16V Z = 10V Dielectric codes: A = NP0(C0G) C = X7R D = X5R F = X8R G = Y5V U = U Series W = X6S Z = X7S Tolerance codes: B = ±.10 pF C = ±.25 pF D = ±.50 pF F = ±1% (/= 10 pF) G = ±2% (/= 10 pF) J = ±5% K = ±10% M = ±20% Z = +80%, -20% P = +100%, -0% NT |
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