Capacitor model naming and marking
1. Capacitor model naming
Domestic capacitor models are generally composed of four parts (not applicable to pressure-sensitive, variable vacuum capacitors). In turn represent the name, materials, classification and serial number.
Part I: names, letters, capacitor C.
Part II: materials, using letters.
Part III: Classification, general figures, said the letter indicated that individual users.
Part IV: serial number, use numerals.
Materials for products with letters: A-tantalum electrolytic, B-polystyrene and other non-polar films, C-high-frequency ceramic, D-aluminum, E-other materials, electrolysis, G-alloy electrolysis, H-composite media, I-glass glaze, J-metal-based paper, L-polyester and other polar organic thin film, N-niobium electrolysis, O-glass membrane, Q-film, T-low-frequency ceramics, V-mica paper, Y-mica, Z - Paper Jie
2. Capacitor capacity mark
1, straight standard method
With numbers and units of symbols directly marked. If 1uF that a micro-method, some of capacitance with the "R", said decimal point, such as the R56, said 0.56 microfarads.
2, text symbols France
Figures and text symbols to represent a combination of a regular capacity. Such as p10 that 0.1pF, 1p0 said 1pF, 6P8, said 6.8pF, 2u2 said 2.2uF.
3, color standard method
The use of color ring or color point that the main parameters of capacitors. Capacitor and resistor color the same as France.
Capacitor deviation signs and symbols: +100%-0 - H, +100% -10% - R, +50% -10% - T, +30% -10% - Q, +50% -20% - S, +80% -20% - Z
4, mathematical counting method: As mentioned in Figure Ceramic capacitor, marked the value of 272, capacity is: 27X100pf = 2700pf. If the standard value of 473, that is, 47X1000pf = back 2,3, have said the amount of 10-th power). Another example: 332 = 33X100pf = 3300pf. |
