1.02 in (26 mm)
minimum
Ø 0.08 in (2 mm)
maximum
0.17 in (4.2 mm)
maximum
1.02 in (26 mm)
minimum
Type TH
Specifications
Glass encapsulated radial lead thermistor
Ø 0.02in (0.5 mm) maximum
Part
Number
Resistance
(25 W )
β Constant Recommended
Maximum
Permissible
Current at 77°F
(25ºC)
(25/50)
Maximum
NTC Type TH dimensions
Operating Current
at 77°F (25ºC)
TH220J33G
TH225J13G
TH238J34G
TH253J34G
TH310J34G
TH310J36G
TH310J39G
TH315J39G
TH320J39G
TH349J39G
TH350J39G
TH398J40G
TH410J40G
TH420J34G
TH423J41G
TH510J44G
TH513J44G
2.0 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
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
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
• 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.
2.545 K
3.896 K
5.369 K
10.74 K
10.0 K
10.0 K
15.0 K
Dissipation Factor
(in still air)
Time Constant
(in still air)
Operating
Temperature Range
Rated Power
at 77°F (25ºC)
20.0 K
49.12 K
50.0 K
2.0 (mW/ºC)
25 (seconds)
-40°F to 482°F
25 mW
(-40°C to 250ºC)
98.63 K
100.0 K
200.0 K
231.4 K
1,000 K
1,388 K
5.0 mA
3.5 mA
3.5 mA
1.5 mA
1.0 mA