Overcurrent protection
SMDs, EIA sizes 3225 and 4032, 63 V
Symbols and terms
A
C
th
f
I
I
max
I
R
I
PTC
I
r
I
r,oil
I
r,air
I
RMS
I
S
I
Smax
LCT
N
N
c
N
f
P
P
25
P
el
P
diss
R
min
R
R
∆R
R
R
P
R
PTC
R
ref
R
S
R
25
R
25,match
∆R
25
T
t
T
A
t
a
T
C
Area
Heat capacity
Frequency
Current
Maximum current
Rated current
PTC current
Residual currrent
Residual currrent in oil (for level sensors)
Residual currrent in air (for level sensors)
Root-mean-square value of current
Switching current
Maximum switching current
Lower category temperature
Number (integer)
Operating cycles at V
max
, charging of capacitor
Switching cycles at V
max
, failure mode
Power
Maximum power at 25
°C
Electrical power
Dissipation power
Minimum resistance
Rated resistance
Tolerance of R
R
Parallel resistance
PTC resistance
Reference resistance
Series resistance
Resistance at 25
°C
Resistance matching per reel/ packing unit at 25
°C
Tolerance of R
25
Temperature
Time
Ambient temperature
Thermal threshold time
Ferroelectric Curie temperature
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 8 of 10
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