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Home » NEWEST Products » New by Manufacturer » Semitec USA » Semitec AT & ET Thermistors
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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

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

Semitec AT Thermistor


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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

Semitec ET Thermistors

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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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