NTC Thermistor：TCF Type
：
Lead Frame for Temperature Sensing/Compensation
Electrical Characteristics
Zero Power
Resistance
at 25°
C
R
25
(K )
TCF3A202□318*
TCF3A502□33C*
TCF3A103□34D*
TCF3A123□347*
TCF3A203□40B*
TCF3A303□409*
TCF3A333□409*
TCF3A473□409*
TCF3A503□406*
TCF3A104□419*
2
5
10
12
20
30
33
47
50
100
1、2、3、
5、10
Tolerance
of
R
25
( ±%)
Tolerance
of
B value
(±%)
Max.
Power
Rating
at 25°
C
P
max
(mW)
Thermal
Operating
Safety
Time
Temperature
Approvals
Constant
Range
τ(Sec.)
T
L
~T
U
(°
C)
UL cUL
√
√
√
√
1、2、3
150
Approx.
2
Approx.
12
-40~+100
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
Part No.
B
25/85
Value
(K)
3180
3325
3435
3470
4015
4090
4090
4090
4060
4190
Dissipation
Factor
δ(mW/°
C)
Note 1:
□
= Tolerance of R
25
,
Note 2: UL/
cUL
File No E138827
* = Tolerance of B value
Power Derating Curve
Max power rating (%)
100
T
U
：Maximum
operating temperature (℃)
T
L
：Minimum
operating temperature (℃)
For example：Ambient temperature(Ta)=55℃
Maximum operating temperature(T
U
)＝100℃
P
Ta
=(T
U
-Ta)/(T
U
-25)×Pmax＝60% Pmax
0
T
L
0
25
T
U
Ambient temperature (
℃
)
THINKING ELECTRONIC INDUSTRIAL Co., LTD.
2
www.thinking.com.tw
2008.03
THINKING [ Thinking Electronic Industrial Co.,Ltd ]
