Overcurrent protection
SMDs, EIA sizes 3225 and 4032, 63 V
t
E
T
R
T
sense
T
op
T
PTC
t
R
T
ref
T
Rmin
t
S
T
surf
UCT
V or V
el
V
RMS
V
BD
V
ins
V
link,max
V
max
V
max,dyn
V
meas
V
meas,max
V
R
V
PTC
α
∆
δ
th
τ
th
λ
Settling time (for level sensors)
Rated temperature
Sensing temperature
Operating temperature
PTC temperature
Response time
Reference temperature
Temperature at minimum resistance
Switching time
Surface temperature
Upper category temperature
Voltage (with subscript only for distinction from volume)
Root-mean-square value of voltage
Breakdown voltage
Insulation test voltage
Maximum link voltage
Maximum operating voltage
Maximum dynamic (short-time) operating voltage
Measuring voltage
Maximum measuring voltage
Rated voltage
Voltage drop across a PTC thermistor
Temperature coefficient
Tolerance, change
Dissipation factor
Thermal cooling time constant
Failure rate
Lead spacing (in mm)
Abbreviations / Notes
Surface-mount devices
* To be replaced by a number in ordering codes, type designations etc.
+ To be replaced by a letter
All dimensions are given in mm.
The commas used in numerical values denote decimal points.
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 9 of 10
EPCOS [ EPCOS ]
