NTC (Negative Temperature Coefficient) Thermistors

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AT & ET Thermistors

Semitec USA AT and ET Thermistors are available in a variety of resistance values, sizes, and termination styles. These high-precision thermal sensing devices have a maximum operating temperature of 90°C, 105°C, or 110°C. The AT series feature extremely small B-value tolerance and resistance while ensuring accurate temperature detection within ±0.3°C. They require no adjustment between the control circuit and the sensor when used as a temperature gauge. The ET thermistors are a smaller version of the AT series. The ET series is highly reliable and offers a fast response time. These thermistors are ideally suited for medical equipment and thermometers.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (EUR) Filter the results in the table by unit price based on your quantity.	Qty.	Series	B Parameter	Resistance	Power Rating	Tolerance	Mounting Style	Termination Style	Minimum Operating Temperature	Maximum Operating Temperature	Diameter	Length	Width	Height	Packaging
NTC (Negative Temperature Coefficient) Thermistors 232kohm 3% 234ET-2 Semitec 1: 0,755 € 9In Stock	Mfr. Part No. 234ET-2 Mouser Part No 954-234ET-2	Semitec	NTC (Negative Temperature Coefficient) Thermistors 232kohm 3% Learn More about Semitec atet	Datasheet	9In Stock	0,755 € 0,573 € 0,494 € 0,477 € View 0,406 € 0,405 € 0,352 € 0,327 € 0,298 €	Min.: 1 Mult.: 1	ET	4274 K	232 kOhms	3.5 mW	3 %	PCB Mount	Radial	- 40 C	+ 100 C	1.6 mm	45 mm	1.6 mm	4 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 100kohm 3% 104ET-1 Semitec 1: 1,22 € 170In Stock	Mfr. Part No. 104ET-1 Mouser Part No 954-104ET-1	Semitec	NTC (Negative Temperature Coefficient) Thermistors 100kohm 3% Learn More about Semitec atet	Datasheet	170In Stock	1,22 € 0,917 € 0,733 € 0,69 € View 0,673 € 0,565 € 0,525 € 0,483 €	Min.: 1 Mult.: 1	ET	4132 K	100 kOhms		3 %	PCB Mount	Radial	- 40 C	+ 90 C	1.5 mm	87 mm	1.5 mm	4 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 20kohm 1% 203AT-2 Semitec 1: 0,513 € 3.866In Stock	Mfr. Part No. 203AT-2 Mouser Part No 954-203AT-2	Semitec	NTC (Negative Temperature Coefficient) Thermistors 20kohm 1% Learn More about Semitec atet	Datasheet	3.866In Stock	0,513 € 0,456 € 0,455 € 0,395 € View 0,364 € 0,331 €	Min.: 1 Mult.: 1	AT	4013 K	20 kOhms	10 mW	1 %	PCB Mount	Radial	- 50 C	+ 110 C		17 mm	3.7 mm	2.4 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 41kohm 3% 413ET-2 Semitec 1: 0,976 € 200In Stock	Mfr. Part No. 413ET-2 Mouser Part No 954-413ET-2	Semitec	NTC (Negative Temperature Coefficient) Thermistors 41kohm 3% Learn More about Semitec atet	Datasheet	200In Stock	0,976 € 0,745 € 0,643 € 0,62 € View 0,528 € 0,527 € 0,459 € 0,404 € 0,37 €	Min.: 1 Mult.: 1	ET		41 kOhms		3 %	PCB Mount	Radial	- 40 C	+ 100 C	1.6 mm	4 mm			Bulk
NTC (Negative Temperature Coefficient) Thermistors 83kohm 3% 833ET-2 Semitec 1: 0,755 € 317In Stock	Mfr. Part No. 833ET-2 Mouser Part No 954-833ET-2	Semitec	NTC (Negative Temperature Coefficient) Thermistors 83kohm 3% Learn More about Semitec atet	Datasheet	317In Stock	0,755 € 0,573 € 0,494 € 0,477 € View 0,406 € 0,405 € 0,352 € 0,327 € 0,298 €	Min.: 1 Mult.: 1	ET	4013 K	83 kOhms		3 %	PCB Mount	Radial	- 40 C	+ 100 C	1.6 mm	45 mm	1.6 mm	4 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10kohm 1% 103AT-2 Semitec 1: 0,583 € 134.997In Stock 128.200Expected 12/11/2026	Mfr. Part No. 103AT-2 Mouser Part No 954-103AT-2	Semitec	NTC (Negative Temperature Coefficient) Thermistors 10kohm 1% Learn More about Semitec atet	Datasheet	134.997In Stock 128.200Expected 12/11/2026	0,583 € 0,548 € 0,512 € 0,488 € View 0,465 € 0,418 € 0,402 € 0,368 €	Min.: 1 Mult.: 1	AT	3435 K	10 kOhms		1 %	PCB Mount	Radial	- 50 C	+ 110 C		17 mm	3.7 mm	2.4 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10kohm 1% 103AT-11 Semitec 1: 2,31 € 5.119In Stock 8.000Expected 1/8/2027	Mfr. Part No. 103AT-11 Mouser Part No 954-103AT-11	Semitec	NTC (Negative Temperature Coefficient) Thermistors 10kohm 1% Learn More about Semitec atet	Datasheet	5.119In Stock 8.000Expected 1/8/2027	2,31 € 2,21 € 2,08 € 2,00 € View 1,91 € 1,72 € 1,66 € 1,62 €	Min.: 1 Mult.: 1	AT	3435 K	10 kOhms		1 %	Off-Board	Wire Lead	- 50 C	+ 105 C		600 mm	6 mm	5 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10kohm 1% Shape 1 30 AWG 150mm 103AT-4-10228 Semitec 1: 0,55 € 12.307In Stock	Mfr. Part No. 103AT-4-10228 Mouser Part No 954-103AT-4-10228	Semitec	NTC (Negative Temperature Coefficient) Thermistors 10kohm 1% Shape 1 30 AWG 150mm Learn More about Semitec atet	Datasheet	12.307In Stock	0,55 € 0,527 € 0,492 € 0,468 € View 0,446 € 0,403 € 0,387 € 0,354 €	Min.: 1 Mult.: 1	AT	3435 K	10 kOhms		1 %	Off-Board	Wire Lead	- 50 C	+ 90 C	2.5 mm	150 mm	2.5 mm	8 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10kohm 1% Shape 1 30 AWG 100mm 103AT-4-70261 Semitec 1: 0,704 € 32.348In Stock	Mfr. Part No. 103AT-4-70261 Mouser Part No 954-103AT-4-70261	Semitec	NTC (Negative Temperature Coefficient) Thermistors 10kohm 1% Shape 1 30 AWG 100mm Learn More about Semitec atet	Datasheet	32.348In Stock	0,704 € 0,665 € 0,622 € 0,593 € View 0,565 € 0,511 € 0,491 € 0,461 €	Min.: 1 Mult.: 1	AT	3435 K	10 kOhms		1 %	Off-Board	Wire Lead	- 50 C	+ 90 C	2.5 mm	100 mm	2.5 mm	8 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10kohm 1% Shape 1 30 AWG 175mm 103AT-4-70316 Semitec 1: 0,765 € 7.501In Stock 27.000On Order	Mfr. Part No. 103AT-4-70316 Mouser Part No 954-103AT-4-70316	Semitec	NTC (Negative Temperature Coefficient) Thermistors 10kohm 1% Shape 1 30 AWG 175mm Learn More about Semitec atet	Datasheet	7.501In Stock 27.000On Order On Order Ship Dates Mfr. No: 103AT-4-70316 Stock: 7.501 Can Dispatch Immediately On Order: 8.200 Expected 11/13/2026 18.800 Expected 12/11/2026 Factory Lead Time: 17 Weeks	0,765 € 0,724 € 0,678 € 0,646 € View 0,617 € 0,557 € 0,536 € 0,493 €	Min.: 1 Mult.: 1	AT	3435 K	10 kOhms		1 %	Off-Board	Wire Lead	- 50 C	+ 90 C	2.5 mm	175 mm	2.5 mm	8 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10kohm 1% Shape 1 30 AWG 50mm 103AT-4-70374 Semitec 1: 0,724 € 31.770In Stock	Mfr. Part No. 103AT-4-70374 Mouser Part No 954-103AT-4-70374	Semitec	NTC (Negative Temperature Coefficient) Thermistors 10kohm 1% Shape 1 30 AWG 50mm Learn More about Semitec atet	Datasheet	31.770In Stock	0,724 € 0,681 € 0,638 € 0,607 € View 0,579 € 0,578 € 0,516 € 0,493 € 0,452 €	Min.: 1 Mult.: 1	AT	3435 K	10 kOhms		1 %	Off-Board	Wire Lead	- 50 C	+ 90 C	2.5 mm	50 mm	2.5 mm	8 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10kohm 1% Shape 1 30 AWG 120mm 103AT-4-70378 Semitec 1: 0,684 € 5.062In Stock	Mfr. Part No. 103AT-4-70378 Mouser Part No 954-103AT-4-70378	Semitec	NTC (Negative Temperature Coefficient) Thermistors 10kohm 1% Shape 1 30 AWG 120mm Learn More about Semitec atet	Datasheet	5.062In Stock	0,684 € 0,648 € 0,606 € 0,577 € View 0,551 € 0,517 € 0,497 € 0,477 € 0,438 €	Min.: 1 Mult.: 1	AT	3435 K	10 kOhms		1 %	Off-Board	Wire Lead	- 50 C	+ 90 C	2.5 mm	120 mm	2.5 mm	8 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 1kohm 1% 102AT-2 Semitec 1: 0,704 € 24In Stock 400On Order	Mfr. Part No. 102AT-2 Mouser Part No 954-102AT-2	Semitec	NTC (Negative Temperature Coefficient) Thermistors 1kohm 1% Learn More about Semitec atet	Datasheet	24In Stock 400On Order On Order Ship Dates Mfr. No: 102AT-2 Stock: 24 Can Dispatch Immediately On Order: 200 Expected 1/19/2027 200 Expected 1/25/2027 Factory Lead Time: 16 Weeks	0,704 € 0,664 € 0,622 € 0,592 € View 0,565 € 0,51 € 0,49 € 0,45 €	Min.: 1 Mult.: 1	AT	3100 K	1 kOhms		1 %	PCB Mount	Radial	- 50 C	+ 90 C		17 mm	3.7 mm	2.4 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10kohm 3% 103ET-1 Semitec 1: 0,905 € 215In Stock	Mfr. Part No. 103ET-1 Mouser Part No 954-103ET-1	Semitec	NTC (Negative Temperature Coefficient) Thermistors 10kohm 3% Learn More about Semitec atet	Datasheet	215In Stock	0,905 € 0,853 € 0,733 € 0,69 € View 0,673 € 0,656 € 0,546 € 0,525 € 0,483 €	Min.: 1 Mult.: 1	ET	3250 K	10 kOhms	3.5 mW	3 %	Off-Board	Wire Lead	- 40 C	+ 90 C	1.5 mm	87 mm	1.5 mm	4 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10kohm 3% 103ET-2 Semitec 1: 0,966 € 163In Stock	Mfr. Part No. 103ET-2 Mouser Part No 954-103ET-2	Semitec	NTC (Negative Temperature Coefficient) Thermistors 10kohm 3% Learn More about Semitec atet	Datasheet	163In Stock	0,966 € 0,744 € 0,642 € 0,619 € View 0,527 € 0,459 € 0,404 € 0,37 €	Min.: 1 Mult.: 1	ET	3250 K	10 kOhms	3.5 mW	3 %	Off-Board	Wire Lead	- 40 C	+ 90 C	1.6 mm	45 mm	1.6 mm	4 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10kohm 2% 103ETB Semitec 1: 0,704 € 409In Stock	Mfr. Part No. 103ETB Mouser Part No 954-103ETB	Semitec	NTC (Negative Temperature Coefficient) Thermistors 10kohm 2% Learn More about Semitec atet	Datasheet	409In Stock	0,704 € 0,667 € 0,625 € 0,596 € View 0,568 € 0,567 € 0,513 € 0,493 € 0,453 €	Min.: 1 Mult.: 1	ET	3435 K	10 kOhms	3.5 mW	2 %	PCB Mount	Wire Lead	- 40 C	+ 90 C	1.6 mm	45 mm	1.6 mm	4 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 2kohm 1% 202AT-2 Semitec 1: 0,966 € 1.470In Stock	Mfr. Part No. 202AT-2 Mouser Part No 954-202AT-2	Semitec	NTC (Negative Temperature Coefficient) Thermistors 2kohm 1% Learn More about Semitec atet	Datasheet	1.470In Stock	0,966 € 0,739 € 0,637 € 0,615 € View 0,524 € 0,456 € 0,413 € 0,378 €	Min.: 1 Mult.: 1	AT	3182 K	2 kOhms	10 mW	1 %	PCB Mount	Radial	- 50 C	+ 90 C		17 mm	3.7 mm	2.4 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 4kohm 3% 402ET-1 Semitec 1: 0,905 € 590In Stock	Mfr. Part No. 402ET-1 Mouser Part No 954-402ET-1	Semitec	NTC (Negative Temperature Coefficient) Thermistors 4kohm 3% Learn More about Semitec atet	Datasheet	590In Stock	0,905 € 0,766 € 0,678 € 0,646 € View 0,617 € 0,558 € 0,464 € 0,426 €	Min.: 1 Mult.: 1	ET	3100 K	4 kOhms	3.5 mW	3 %	PCB Mount	Radial	- 40 C	+ 90 C	1.5 mm	87 mm	1.5 mm	4 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 5kohm 1% 502AT-2 Semitec 1: 0,583 € 981In Stock	Mfr. Part No. 502AT-2 Mouser Part No 954-502AT-2	Semitec	NTC (Negative Temperature Coefficient) Thermistors 5kohm 1% Learn More about Semitec atet	Datasheet	981In Stock	0,583 € 0,548 € 0,512 € 0,488 € View 0,465 € 0,418 € 0,402 € 0,368 €	Min.: 1 Mult.: 1	AT	3324 K	5 kOhms	10 mW	1 %	PCB Mount	Radial	- 50 C	+ 110 C		17 mm	3.7 mm	2.4 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 50kohm 3% 503ET-1 Semitec 1: 1,22 € 388In Stock	Mfr. Part No. 503ET-1 Mouser Part No 954-503ET-1	Semitec	NTC (Negative Temperature Coefficient) Thermistors 50kohm 3% Learn More about Semitec atet	Datasheet	388In Stock	1,22 € 0,917 € 0,733 € 0,69 € View 0,673 € 0,565 € 0,525 € 0,483 €	Min.: 1 Mult.: 1	ET	4055 K	50 kOhms	3.5 mW	3 %	PCB Mount	Radial	- 40 C	+ 100 C	1.5 mm	87 mm	1.5 mm	4 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10kohm 1% Shape1 30 AWG 75mm 103AT-4-80025 Semitec 1: 0,835 € 8.285On Order	Mfr. Part No. 103AT-4-80025 Mouser Part No 954-103AT-4-80025	Semitec	NTC (Negative Temperature Coefficient) Thermistors 10kohm 1% Shape1 30 AWG 75mm Learn More about Semitec atet	Datasheet	8.285On Order On Order Ship Dates Mfr. No: 103AT-4-80025 Stock: 0 On Order: 1.285 Expected 1/21/2027 7.000 Expected 2/4/2027 Factory Lead Time: 17 Weeks	0,835 € 0,791 € 0,674 € 0,634 € View 0,618 € 0,608 € 0,519 € 0,486 € 0,446 €	Min.: 1 Mult.: 1	AT	3435 K	10 kOhms		1 %	Off-Board	Wire Lead	- 50 C	+ 90 C	2.5 mm	75 mm	2.5 mm	8 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10kohm 1% 103AT-5-1P-FT Semitec 1: 0,553 € 13.912On Order	Mfr. Part No. 103AT-5-1P-FT Mouser Part No 954-103AT-5-1P-FT	Semitec	NTC (Negative Temperature Coefficient) Thermistors 10kohm 1% Learn More about Semitec atet	Datasheet	13.912On Order On Order Ship Dates Mfr. No: 103AT-5-1P-FT Stock: 0 On Order: 3.912 Pending 10.000 Expected 11/13/2026 Factory Lead Time: 20 Weeks	Cut Tape 0,553 € 0,523 € 0,489 € 0,465 € View Reel 0,358 € 0,443 € 0,399 € 0,383 € 0,358 €	Min.: 1 Mult.: 1 : 2.500		3435 K	10 kOhms		1 %	PCB Mount	Radial	- 50 C	+ 110 C	2.5 mm	30 mm	3.5 mm	2.4 mm	Reel, Cut Tape
NTC (Negative Temperature Coefficient) Thermistors 100kohm 1% 104AT-2 Semitec 1: 0,966 € 25.097On Order	Mfr. Part No. 104AT-2 Mouser Part No 954-104AT-2	Semitec	NTC (Negative Temperature Coefficient) Thermistors 100kohm 1% Learn More about Semitec atet	Datasheet	25.097On Order On Order Ship Dates Mfr. No: 104AT-2 Stock: 0 On Order: 7.897 Expected 12/25/2026 17.200 Expected 1/8/2027 Factory Lead Time: 19 Weeks	0,966 € 0,746 € 0,643 € 0,621 € View 0,528 € 0,46 € 0,404 € 0,371 €	Min.: 1 Mult.: 1	AT	4665 K	100 kOhms	10 mW	1 %	PCB Mount	Radial	- 50 C	+ 110 C		17 mm	3.7 mm	2.4 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 4kohm 3% 402ET-2 Semitec 1: 0,865 € 399Expected 12/11/2026	Mfr. Part No. 402ET-2 Mouser Part No 954-402ET-2	Semitec	NTC (Negative Temperature Coefficient) Thermistors 4kohm 3% Learn More about Semitec atet	Datasheet	399Expected 12/11/2026	0,865 € 0,817 € 0,699 € 0,657 € View 0,641 € 0,628 € 0,523 € 0,503 € 0,462 €	Min.: 1 Mult.: 1	ET	3100 K	4 kOhms	3.5 mW	3 %	PCB Mount	Radial	- 40 C	+ 90 C	1.6 mm	45 mm	1.6 mm	4 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 40kohm 3% 403ET-2 Semitec 1: 0,966 € 197Expected 1/8/2027	Mfr. Part No. 403ET-2 Mouser Part No 954-403ET-2	Semitec	NTC (Negative Temperature Coefficient) Thermistors 40kohm 3% Learn More about Semitec atet	Datasheet	197Expected 1/8/2027	0,966 € 0,744 € 0,642 € 0,619 € View 0,527 € 0,459 € 0,404 € 0,37 €	Min.: 1 Mult.: 1	ET	3525 K	40 kOhms	3.5 mW	3 %	PCB Mount	Radial	- 40 C	+ 100 C	1.6 mm	45 mm	1.6 mm	4 mm	Bulk

AT & ET Thermistors

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