NTC Thermistor：TCF Type
Lead Frame for Temperature Sensing/Compensation
ꢀ Electrical Characteristics
Max.
Zero Power
Resistance
at 25°C
Tolerance
Tolerance
of
B value
Thermal
Time
Constant
Operating
Temperature
Range
B25/85
Value
Power
Rating
at 25°C
Dissipation
Factor
Safety
Approvals
of
R25
Part No.
R25 (Kꢁ)
2
( ±%)
(K)
(±%)
Pmax(mW)
δ(mW/°C)
τ(Sec.)
TL~TU(°C)
UL cUL
TCF3A202□318*
TCF3A502□33C*
TCF3A103□34D*
TCF3A123□347*
TCF3A203□40B*
TCF3A303□409*
TCF3A333□409*
TCF3A473□409*
TCF3A503□406*
TCF3A104□419*
3180
3325
3435
3470
4015
4090
4090
4090
4060
4190
√
5
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
10
12
20
1、2、3、
5、10
Approx.
2
Approx.
12
1、2、3
150
-40~+100
30
33
47
50
100
Note 1: □ = Tolerance of R25
,
* = Tolerance of B value
Note 2: UL/cUL File No E138827
ꢀ Power Derating Curve
TU：Maximum operating temperature (℃)
TL：Minimum operating temperature (℃)
100
For example：Ambient temperature(Ta)=55℃
Maximum operating temperature(TU)＝100℃
PTa=(TU-Ta)/(TU-25)×Pmax＝60% Pmax
0
TU
TL
0
25
Ambient temperature (℃)
THINKING ELECTRONIC INDUSTRIAL Co., LTD.
2
www.thinking.com.tw
2008.03
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