Semitec AT & ET Thermistors
Semitec
introduced the
AT Thermistors
as high-precision thermal sensing devices featuring extremely small B-value tolerance and resistance. To meet the requirements of compact applications requiring high reliability and fast response times such as medical equipment and thermometers,
Semitec
developed the
ET Thermistors
as a smaller version of the
AT Thermistors.
Semitec AT
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Semitec designed the AT Thermistors as high-precision thermal sensing devices featuring extremely small B-value tolerance and resistance. The Semitec AT Thermistors
ensure accurate temperature detection within ±0.3⁰, and require no
adjustment between the control circuit and the sensor when used as a
temperature gauge. Operating in a temperature range of -50⁰C to 110⁰C,
these devices offer a resistance of 1.0kΩ±1% to 100.0kΩ±1% at 25⁰C, B
value of 3100K±1% to 4665K±1%, and an approximate response time of 10 to
75 seconds in the air.
AT
Part Number Description
|
View Products List
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AT Specifications
|
Part Number
|
R
25
*1
|
B value
*2
|
Dissipation factor
(mW/ºC)
Approx.
|
Thermal time
constant(s)
*3
Approx.
|
Rated maximum
power dissipation
(at 25ºC) (mW)
|
Category temp.
range (ºC)
|
102AT-2
|
1.00kΩ±1%
|
3100K±1%
|
2
|
15
|
10
|
-50 to 90
|
202AT-2
|
2.00kΩ±1%
|
3182K±1%
|
2
|
15
|
10
|
-50 to 90
|
502AT-2
|
5.00kΩ±1%
|
3324K±1%
|
2
|
15
|
10
|
-50 to 110
|
103AT-2
|
10.00kΩ±1%
|
3435K±1%
|
2
|
15
|
10
|
-50 to 110
|
203AT-2
|
20.00kΩ±1%
|
4013K±1%
|
2
|
15
|
10
|
-50 to 110
|
104AT-2
|
100.00kΩ±1%
|
4665K±1%
|
2
|
15
|
10
|
-50 to 110
|
|
103AT-11
|
10.00kΩ±1%
|
3435K±1%
|
3
|
75
|
13
|
-50 to 110
|
103AT-4-10228
|
10.00kΩ±1%
|
3435K±1%
|
2
|
10
|
10
|
-50 to 110
|
103AT-4-70261
|
10.00kΩ±1%
|
3435K±1%
|
2
|
10
|
10
|
-50 to 110
|
103AT-4-70316
|
10.00kΩ±1%
|
3435K±1%
|
2
|
10
|
10
|
-50 to 110
|
103AT-4-70374
|
10.00kΩ±1%
|
3435K±1%
|
2
|
10
|
10
|
-50 to 110
|
103AT-4-70378
|
10.00kΩ±1%
|
3435K±1%
|
2
|
10
|
10
|
-50 to 110
|
103AT-4-80025
|
10.00kΩ±1%
|
3435K±1%
|
2
|
10
|
10
|
-50 to 110
|
*1 R
25
: Rated zero-power resistance value at 25ºC.
*2 B value: Determined by rated zero-power resistance at 25ºC and 85ºC.
*3 Time when thermistor temperature reaches 63.2% of the temperature difference.
Semitec ET
Semitec introduced the
ET Thermistors
as a smaller version of the
AT Thermistors
operating in the temperature range of -40⁰C to +110⁰C. The
ET Thermistors
offer a resistance of 4.0kΩ±3% to 232.0kΩ±3% at 25⁰C, B value of 3100K±1% to 4274K±1%, and an approximate response time of 3.2 seconds in the air. Featuring fast response times and high reliability, the
Semitec ET Thermistors
are ideally suited for medical equipment and thermometers.
ET Part Number Description 
|
View Products List
|
ET Specifications
|
Part Number
|
R
25
*1
|
B value
*2
|
Dissipation factor
(mW/ºC)
Approx.
|
Thermal time
constant(s)
*3
Approx.
|
Rated maximum
power dissipation
(at 25ºC) (mW)
|
Category temp.
range (ºC)
|
402ET-1
|
4.00kΩ±3%
|
3100K±1%
|
0.7
|
3.2
(3.4)
|
3.5
|
-40 to 90
|
103ET-1
|
10.00kΩ±3%
|
3250K±1%
|
303ET-1
|
30.00kΩ±3%
|
3760K±1%
|
-40 to 100
|
503ET-1
|
50.00kΩ±3%
|
4055K±1%
|
833ET-1
|
83.00kΩ±3%
|
4013K±1%
|
104ET-1
|
100.00kΩ±3%
|
4132K±1%
|
-40 to 90
|
224ET-1
|
226.00kΩ±3%
|
4021K±1%
|
-40 to 100
|
402ET-2
|
4.00kΩ±3%
|
3100K±1%
|
103ET-2
|
10.00kΩ±3%
|
3250K±1%
|
-40 to 90
|
303ET-2
|
30.00kΩ±3%
|
3760K±1%
|
-40 to 100
|
403ET-2
|
40.00kΩ±3%
|
3525K±1%
|
413ET-2
|
41.00kΩ±3%
|
3435K±1%
|
503ET-2
|
50.00kΩ±3%
|
4055K±1%
|
833ET-2
|
83.00kΩ±3%
|
4013K±1%
|
104ET-2
|
100.00kΩ±3%
|
4132K±1%
|
-40 to 90
|
|
224ET-2
|
226.00kΩ±3%
|
4021K±1%
|
-40 to 100
|
|
103ETB
|
10.00kΩ±1%±2%
|
3435K±1%
|
-40 to 90
|
*1 R
25
: Rated zero-power resistance value at 25ºC.
*2 B value: Determined by rated zero-power resistance at 25ºC and 85ºC.
*3 Time when thermistor temperature reaches 63.2% of the temperature difference.
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