LouisKatz | Main / CapacitorMarkingsTypes

numeric markings are in picofarads for ceramic, film, and tantalum
numeric markings are in microfarad for electrolytic

F, μF, nF, pF

XXx ? where XX are significant figures and x is multiplier or number of zeros ceramic 104 = 10 0000 picofarads pF = 100nF = .1uF

1 Farad = 1000 millifarads = 1,000,000 microfarads = 1,000,000,000 nanofarads = 1,000,000,000,000 pico 1 pF = 1.0E-12 F = 1.0E-9 nF = 1.0E-6 uF

Typical bypass cap values are .1 uF , .33uF, 1uF

Types

Ceramic Mica low capacitancy usually well below 1 microfarad. But high stability. Often best in high power RF. Low loss. Film typical 1nF to 30µF voltages can be 50 volts and up. Long life. Can fail with burning. Tantalum 1nF to 72mF usually polarized, fail with fire sometimes. better characteristics than other electrolytic, 2-500V, more stability over time than other electrolytics. Electrolytic Air variable Vacumn

Uses

RF 10K-150mHz Ceramic, ceramic chip, mica, air variable, vacuum audio tantalum, electrolytic power supply, tantalum, electrolytic, film,

Class

Class 1 Better Stability
- NPO temperature stability for RF circuits where it will affect frequency.
- C0G ?
Class 2
- X7R ? X is the lowest temp. X= -55˚C, Second space number is max temp. X7- the 7 means 125˚C , 5 means 85˚C, the last spot the letter indicades the amount it can change with temperature R is 15%, V is a whopping 82%.

Sizes

What a mess we have made.