short circuits SABER CARD, Instruction Manual

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18
Capacitor - Ceramic
Overview
Capacitors are so named for their ability to
store a certain capacity of electrical energy
(Capacitance), measured in farads (F). A
certain amount of capacitance exists be-
tween any two conductors that are in close
proximity (this can sometimes be seen in
an LED matrix in the form of ghosting, and
can also cause problems in other sensitive
circuits). Capacitors use this in a controlled
manner, for various purposes. They usually
consist of two conductors separated by a
dielectric substance. A dielectric is an in-
sulator (does not conduct electricity) that
can be polarised (negative on one side
and positive on the other) by an electric
field. In this case, the dielectric material is
ceramic. A dielectric substance increases
the amount of electrical energy that can
be stored compared to non-dielectric sub-
stances like air.
Physical Construction
Quick Reference
Common Varieties
Important Ratings
Check
Polarity
Positions
2
Type
Schematic
Symbol
PCB Symbol
Designator
passive
C
Single
Layer
High
Voltage
Multilayer Surface
Mount
SL = Single Layer
ML = Multilayer
Parameter Typical Values
Capacitance 0.5pF - 1uF (SL)
1pF - 470uF (ML)
Capacitance Tolerance ± 5 - 20%
DC Rated Voltage
10V - 20kV
Pitch 2.54 - 12.7mm
metal electrode
protective coating
ceramic dialectric
metal contacts
104J
multiplier
tolerance
(J=5%)
first digit
second digit
10 x 10000 = 100,000 pF
= 100 nF
= 0.1 uF
(picofarads)
(nanofarads)
(microfarads)
Identification