Type TH
Specifications
Glass encapsulated radial lead thermistor
Part
Number
Resistance
(25
W
)
β Constant
(25/50)
Recommended
Maximum
Operating Current
at 77°F (25ºC)
0.22 mA
0.22 mA
0.20 mA
0.16 mA
0.13 mA
0.14 mA
0.14 mA
0.12 mA
0.10 mA
0.06 mA
0.06 mA
0.045 mA
0.045 mA
0.015 mA
0.015 mA
0.007 mA
0.005 mA
Maximum
Permissible
Current at 77°F
(25ºC)
30.0 mA
30.0 mA
26.5 mA
24.0 mA
20.0 mA
20.0 mA
20.0 mA
17.0 mA
15.0 mA
10.0 mA
10.0 mA
5.0 mA
5.0 mA
3.5 mA
3.5 mA
1.5 mA
1.0 mA
1.02 in (26 mm)
minimum
0.17 in (4.2 mm)
maximum
1.02 in (26 mm)
minimum
Ø 0.08 in (2 mm)
maximum
Ø 0.02in (0.5 mm) maximum
NTC Type TH dimensions
TH220J33G
TH225J13G
TH238J34G
TH253J34G
TH310J34G
TH310J36G
TH310J39G
TH315J39G
TH320J39G
TH349J39G
TH350J39G
TH398J40G
TH410J40G
TH420J34G
TH423J41G
TH510J44G
TH513J44G
2.0 K
2.545 K
3.896 K
5.369 K
10.74 K
10.0 K
10.0 K
15.0 K
20.0 K
49.12 K
50.0 K
98.63 K
100.0 K
200.0 K
231.4 K
1,000 K
1,388 K
3375 K
3745 K
3434 K
3434 K
3434 K
3684 K
3933 K
3933 K
3952 K
3952 K
3952 K
4014 K
4014 K
3450 K
4176 K
4491 K
4491 K
• The tolerance of resistance is ±5% for standard device.
• The tolerance of B constant is ±2% for standard device.
The constant is determined by the equation:
B = 3853.9 In (R25/R50)
R25 and R50 represent the thermistor resistance
at 77°F and 122°F (25°C and 50°C) respectively.
• Others: For non-standard devices, consult GE.
Dissipation Factor
(in still air)
2.0 (mW/ºC)
Time Constant
(in still air)
25 (seconds)
Operating
Temperature Range
-40°F to 482°F
(-40°C to 250ºC)
Rated Power
at 77°F (25ºC)
25 mW
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