Data Sheet

T Temperature
t
Time
T
A
Ambient temperature
t
a
Thermal threshold time
T
C
Ferroelectric Curie temperature
t
E
Settling time (for level sensors)
T
R
Rated temperature @ 25 °C or otherwise specified in the data sheet
T
sense
Sensing temperature
T
op
Operating temperature
T
PTC
PTC temperature
t
R
Response time
T
ref
Reference temperature
T
Rmin
Temperature at minimum resistance
t
S
Switching time
T
surf
Surface temperature
UCT
Upper category temperature
V or V
el
Voltage (with subscript only for distinction from volume)
V
c(max)
Maximum DC charge voltage of the surge generator
V
F,max
Maximum voltage applied at fault conditions in protection mode
V
RMS
Root-mean-square value of voltage
V
BD
Breakdown voltage
V
ins
Insulation test voltage
V
link,max
Maximum link voltage
V
max
Maximum operating voltage
V
max,dyn
Maximum dynamic (short-time) operating voltage
V
meas
Measuring voltage
V
meas,max
Maximum measuring voltage
V
R
Rated voltage
V
PTC
Voltage drop across a PTC thermistor
α
Temperature coefficient
∆
Tolerance, change
δ
th
Dissipation factor
τ
th
Thermal cooling time constant
λ
Failure rate
Lead spacing (in mm)
Overcurrent protection
Leaded disks, coated, 380 V up to 500 V
Page 8 of 10Please read Cautions and warnings and
Important notes at the end of this document.