NTC (Negative Temperature Coefficient) Thermistors

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Thermistor Probes & Assemblies

Littelfuse Thermistor Probes and Assemblies offer various housings, including stainless steel, vinyl, plastic, and polyimide tubing. The Littelfuse portfolio features different types of probes and assemblies: straight/cylindrical, flanged, plastic, microprobes, laboratory-grade, surface temperature sensing, and threaded.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (USD) 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	Package/Case	Diameter	Length	Width	Height	Packaging
NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE ASSEMBLY USP10975 Littelfuse 1: $9.40 3,210In Stock	Mfr. Part No. USP10975 Mouser Part No 803-USP10975	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE ASSEMBLY Learn More about Littelfuse thermistor probes assemblies	Datasheet	3,210In Stock	$9.40 $8.79 $8.40 $8.23 View $8.16 $7.93	Min.: 1 Mult.: 1	USP	3892 K	10 kOhms		1 %	Off-Board	Wire Lead	- 55 C	+ 125 C		0.1 in	6 in	0.1 in	0.215 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors 2.2K OHM .1% DEG C PROBE ASMB USP11493 Littelfuse 1: $11.39 1,745In Stock	Mfr. Part No. USP11493 Mouser Part No 803-USP11493	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors 2.2K OHM .1% DEG C PROBE ASMB Learn More about Littelfuse thermistor probes assemblies	Datasheet	1,745In Stock	$11.39 $10.25 $9.67 $9.20 View $7.49 $7.18 $7.17 $6.90 $6.83	Min.: 1 Mult.: 1	USP	3892 K	2.252 kOhms		0.1 C	Off-Board	Wire Lead	- 55 C	+ 105 C		0.225 in	12.58 in	0.225 in	0.58 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 20K OHM 2% LUG USUR1000-203G-06 Littelfuse 1: $13.33 33In Stock	Mfr. Part No. USUR1000-203G-06 Mouser Part No 576-USUR1000-203G-06	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 20K OHM 2% LUG Learn More about Littelfuse thermistor probes assemblies	Datasheet	33In Stock	$13.33 $11.78 $10.56 $10.00 View $8.70 $8.56 $8.40	Min.: 1 Mult.: 1	USUR	3892 K	20 kOhms	20 mW	2 %	Ring Lug	Wire Lead	- 40 C	+ 125 C		0.28 in	6 in	0.28 in	0.615 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 30K OHM 2% LUG USUR1000-303G-06 Littelfuse 1: $9.99 1In Stock 50Expected 14/10/2026	Mfr. Part No. USUR1000-303G-06 Mouser Part No 576-USUR1000-303G-06	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 30K OHM 2% LUG Learn More about Littelfuse thermistor probes assemblies	Datasheet	1In Stock 50Expected 14/10/2026	$9.99	Min.: 1 Mult.: 1	USUR	3892 K	30 kOhms	20 mW	2 %	Ring Lug	Wire Lead	- 40 C	+ 125 C		0.28 in	0.615 in			Bulk
NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE ASSEMBLY USP10973 Littelfuse 1: $4.56 2,002In Stock 50Expected 14/10/2026	Mfr. Part No. USP10973 Mouser Part No 803-USP10973	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE ASSEMBLY Learn More about Littelfuse thermistor probes assemblies	Datasheet	2,002In Stock 50Expected 14/10/2026	$4.56 $4.09 $3.91 $3.70 View $3.55 $3.43 $3.17 $3.16	Min.: 1 Mult.: 1	USP	3892 K	10 kOhms		1 %	Off-Board	Wire Lead	- 55 C	+ 105 C		0.164 in	50.75 in	0.164 in	0.787 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE ASSEMBLY USP10976 Littelfuse 1: $5.11 1,189In Stock	Mfr. Part No. USP10976 Mouser Part No 803-USP10976	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE ASSEMBLY Learn More about Littelfuse thermistor probes assemblies	Datasheet	1,189In Stock	$5.11 $4.59 $4.40 $4.17 View $4.01 $3.86 $3.56 $3.46	Min.: 1 Mult.: 1	USP	3892 K	10 kOhms		1 %	Off-Board	Wire Lead	- 55 C	+ 150 C		0.145 in	6 in	0.281 in	0.62 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, US SENSOR USP12836 Littelfuse 1: $16.10 86In Stock 200Expected 09/12/2026	Mfr. Part No. USP12836 Mouser Part No 803-USP12836	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, US SENSOR Learn More about Littelfuse thermistor probes assemblies	Datasheet	86In Stock 200Expected 09/12/2026	$16.10 $14.65 $14.11 $13.46 View $13.02 $12.59 $12.58 $11.52	Min.: 1 Mult.: 1	USP	3977 K	10 kOhms		1 %	Off-Board	Wire Lead	- 55 C	+ 105 C		0.1772 in	9.1811 in	0.1772 in	1.1811 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE ASSEMBLY USP7766 Littelfuse 1: $12.03 227In Stock 550Expected 30/11/2026	Mfr. Part No. USP7766 Mouser Part No 803-USP7766	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE ASSEMBLY Learn More about Littelfuse thermistor probes assemblies	Datasheet	227In Stock 550Expected 30/11/2026	$12.03 $11.03 $10.61 $10.10 View $9.63 $9.12 $9.11 $8.83	Min.: 1 Mult.: 1	USP	3892 K	10 kOhms		1 %	Clip Mount	Wire Lead	- 55 C	+ 105 C		0.164 in	36.787 in	0.787 in	0.787 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10K OHM 5% PROBE TO220 TO103J2K Littelfuse 1: $1.38 4,005In Stock	Mfr. Part No. TO103J2K Mouser Part No 803-TO103J2K	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors 10K OHM 5% PROBE TO220 Learn More about Littelfuse thermistor probes assemblies	Datasheet	4,005In Stock	$1.38 $1.32 $1.24 $1.18 View $1.13 $1.00 $0.971 $0.918	Min.: 1 Mult.: 1	TO	3892 K	10 kOhms		10 %	PCB Mount	Radial	- 55 C	+ 150 C	TO-220-2		0.595 in	0.4 in	0.165 in	Tube
NTC (Negative Temperature Coefficient) Thermistors NTC Thermistor Probe USP10979 Littelfuse 1: $11.92 188In Stock	Mfr. Part No. USP10979 Mouser Part No 803-USP10979	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors NTC Thermistor Probe Learn More about Littelfuse thermistor probes assemblies	Datasheet	188In Stock	$11.92 $10.82 $10.19 $9.91 View $9.56 $9.44 $8.81 $8.38 $8.35	Min.: 1 Mult.: 1	USP	3892 K	10 kOhms		1 %	Off-Board	Wire Lead	- 55 C	+ 105 C		0.25 in	14.25 in	0.314 in	2.25 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, US SENSOR USP12837 Littelfuse 1: $20.30 193In Stock 10Expected 22/10/2026	Mfr. Part No. USP12837 Mouser Part No 803-USP12837	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, US SENSOR Learn More about Littelfuse thermistor probes assemblies	Datasheet	193In Stock 10Expected 22/10/2026	$20.30 $18.52 $17.86 $16.77 View $16.37 $16.35 $16.02 $15.09	Min.: 1 Mult.: 1	USP	3892 K	10 kOhms		1 %	Off-Board	Wire Lead	- 55 C	+ 125 C		0.02 in	12.15 in	0.02 in	0.15 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, US SENSOR USP12840 Littelfuse 1: $31.39 290In Stock	Mfr. Part No. USP12840 Mouser Part No 803-USP12840	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, US SENSOR Learn More about Littelfuse thermistor probes assemblies	Datasheet	290In Stock	$31.39 $28.79 $27.82 $26.65 View $25.85 $24.68 $24.63 Quote	Min.: 1 Mult.: 1	USP	3892 K	10 kOhms		1 %	Threaded	Wire Lead	- 55 C	+ 125 C		0.3125 in	3.25 in	0.3125 in	0.25 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE ASSEMBLY USP7765 Littelfuse 1: $7.79 1,599In Stock 674On Order	Mfr. Part No. USP7765 Mouser Part No 803-USP7765	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE ASSEMBLY Learn More about Littelfuse thermistor probes assemblies	Datasheet	1,599In Stock 674On Order On Order Ship Dates Mfr. No: USP7765 Stock: 1,599 Can Dispatch Immediately On Order: 636 Expected 25/01/2027 38 TBD Factory Lead Time: 21 Weeks	$7.79 $7.03 $6.75 $6.41 View $6.04 $5.97 $5.54 $5.53	Min.: 1 Mult.: 1	USP	3892 K	10 kOhms		1 %	Ring Lug	Wire Lead	- 55 C	+ 105 C		0.16 in	13.3 in	0.4 in	1.3 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10K OHM 2% RING LUG ASMBLY USUR1000-103G-06 Littelfuse 1: $10.56 208In Stock	Mfr. Part No. USUR1000-103G-06 Mouser Part No 803-USUR1000-103G-06	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors 10K OHM 2% RING LUG ASMBLY Learn More about Littelfuse thermistor probes assemblies	Datasheet	208In Stock	$10.56 $9.47 $9.11 $8.67 View $8.26 $8.15 $7.59 $7.41	Min.: 1 Mult.: 1	USUR1000	3892 K	10 kOhms	20 mW	2 %	Ring Lug	Wire Lead	- 40 C	+ 125 C		0.215 in	6 in	0.28 in	0.615 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE ASSEMBLY USP10982 Littelfuse 1: $2.87 821In Stock	Mfr. Part No. USP10982 Mouser Part No 803-USP10982	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE ASSEMBLY Learn More about Littelfuse thermistor probes assemblies	Datasheet	821In Stock	$2.87 $2.62 $2.38 $2.32 View $2.19 $1.87 $1.83 $1.79	Min.: 1 Mult.: 1	USP	3892 K	10 kOhms		1 %	Off-Board	Wire Lead	- 55 C	+ 80 C		0.23 in	37.35 in	0.23 in	1.35 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR USP16673 Littelfuse 1: $1.76 389In Stock 500Expected 19/10/2026	Mfr. Part No. USP16673 Mouser Part No 803-USP16673	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR Learn More about Littelfuse thermistor probes assemblies	Datasheet	389In Stock 500Expected 19/10/2026	$1.76 $1.67 $1.56 $1.47 View $1.43 $1.36 $1.28 $1.26 $1.17	Min.: 1 Mult.: 1	USP	3435 K	10 kOhms		1 %	PCB Mount	Radial	- 30 C	+ 90 C			1.26 in	0.197 in	0.04 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors 100K OHM 2% RING LUG ASMBLY USUR1000-104G-06 Littelfuse 1: $13.33 20In Stock	Mfr. Part No. USUR1000-104G-06 Mouser Part No 576-USUR1000-104G-06	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors 100K OHM 2% RING LUG ASMBLY Learn More about Littelfuse thermistor probes assemblies	Datasheet	20In Stock	$13.33 $11.78 $10.56 $9.38 View $8.85 $8.54 $8.50 $8.16 $7.93	Min.: 1 Mult.: 1	USUR1000	3892 K	100 kOhms	20 mW	2 %	Ring Lug	Wire Lead	- 40 C	+ 125 C			15.621 mm		7.112 mm	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE TO220 TO103J2F Littelfuse 1: $4.68 220In Stock 500Expected 24/02/2027	Mfr. Part No. TO103J2F Mouser Part No 803-TO103J2F	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE TO220 Learn More about Littelfuse thermistor probes assemblies	Datasheet	220In Stock 500Expected 24/02/2027	$4.68 $4.20 $4.02 $3.80 View $3.66 $3.52 $3.11 $3.02	Min.: 1 Mult.: 1	TO	3892 K	10 kOhms		1 %	PCB Mount	Radial	- 55 C	+ 150 C	TO-220-2		0.595 in	0.4 in	0.165 in	Tube
NTC (Negative Temperature Coefficient) Thermistors 10K OHM 10% PROBE TO220 TO103J2J Littelfuse 1: $1.99 635In Stock 11,000On Order	Mfr. Part No. TO103J2J Mouser Part No 803-TO103J2J	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors 10K OHM 10% PROBE TO220 Learn More about Littelfuse thermistor probes assemblies	Datasheet	635In Stock 11,000On Order On Order Ship Dates Mfr. No: TO103J2J Stock: 635 Can Dispatch Immediately On Order: 5,000 Expected 08/12/2026 6,000 Expected 11/03/2027 Factory Lead Time: 20 Weeks	$1.99 $1.90 $1.79 $1.69 View $1.55 $1.42 $1.33 $1.27	Min.: 1 Mult.: 1	TO	3892 K	10 kOhms		5 %	PCB Mount	Radial	- 55 C	+ 150 C	TO-220-2		0.595 in	0.4 in	0.165 in	Tube
NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, US SENSOR TO502J2J Littelfuse 1: $1.88 541In Stock	Mfr. Part No. TO502J2J Mouser Part No 803-TO502J2J	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, US SENSOR Learn More about Littelfuse thermistor probes assemblies	Datasheet	541In Stock	$1.88 $1.79 $1.69 $1.64 View $1.59 $1.43 $1.36 $1.26	Min.: 1 Mult.: 1	TO	3892 K	5 kOhms		5 %	PCB Mount	Radial	- 55 C	+ 150 C	TO-220-2		0.595 in	0.4 in	0.165 in	Tube
NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE ASSEMBLY USP10972 Littelfuse 1: $6.31 171In Stock 650On Order	Mfr. Part No. USP10972 Mouser Part No 803-USP10972	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE ASSEMBLY Learn More about Littelfuse thermistor probes assemblies	Datasheet	171In Stock 650On Order On Order Ship Dates Mfr. No: USP10972 Stock: 171 Can Dispatch Immediately On Order: 150 Expected 14/10/2026 500 Expected 22/12/2026 Factory Lead Time: 14 Weeks	$6.31 $5.68 $5.45 $5.17 View $4.98 $4.79 $4.45 $4.32	Min.: 1 Mult.: 1	USP	3892 K	10 kOhms		1 %	Off-Board	Wire Lead	- 55 C	+ 105 C		0.25 in	51.5 in	0.25 in	2 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10K OHM 5% PROBE ASSEMBLY USP10997 Littelfuse 1: $13.01 25In Stock	Mfr. Part No. USP10997 Mouser Part No 803-USP10997	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors 10K OHM 5% PROBE ASSEMBLY Learn More about Littelfuse thermistor probes assemblies	Datasheet	25In Stock	$13.01 $11.81 $11.36 $10.83 View $10.45 $10.12 $9.44 $9.20	Min.: 1 Mult.: 1	USP	3892 K	10 kOhms		5 %	Off-Board	Wire Lead	- 55 C	+ 105 C		0.4375 in	6.56 in	0.4375 in	0.56 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, U.S. SENS USP11491 Littelfuse 1: $16.77 37In Stock 50Expected 14/10/2026	Mfr. Part No. USP11491 Mouser Part No 803-USP11491	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, U.S. SENS Learn More about Littelfuse thermistor probes assemblies	Datasheet	37In Stock 50Expected 14/10/2026	$16.77 $15.26 $14.70 $14.03 View $13.51 $12.80 $11.63	Min.: 1 Mult.: 1	USP	3892 K	10 kOhms		0.2 C	Off-Board	Wire Lead	- 55 C	+ 150 C		0.125 in	26.5 in	0.125 in	2.5 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE ASSEMBLY USP10981 Littelfuse 1: $25.10 550On Order	Mfr. Part No. USP10981 Mouser Part No 803-USP10981	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE ASSEMBLY Learn More about Littelfuse thermistor probes assemblies	Datasheet	550On Order On Order Ship Dates Mfr. No: USP10981 Stock: 0 On Order: 100 Expected 01/12/2026 350 Expected 07/12/2026 100 Expected 09/12/2026 Factory Lead Time: 13 Weeks	$25.10 $23.15 $22.06 $21.37 View $20.71 $20.10 $18.87	Min.: 1 Mult.: 1	USP	3892 K	10 kOhms		1 %	Off-Board	Wire Lead	- 55 C	+ 105 C		0.25 in	25.25 in	0.25 in	1.25 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE ASSEMBLY USP10978 Littelfuse 1: $25.79 146On Order	Mfr. Part No. USP10978 Mouser Part No 803-USP10978	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors 10K OHM 1% PROBE ASSEMBLY Learn More about Littelfuse thermistor probes assemblies	Datasheet	146On Order On Order Ship Dates Mfr. No: USP10978 Stock: 0 On Order: 46 Expected 04/01/2027 50 Expected 15/02/2027 50 Expected 01/03/2027 Factory Lead Time: 23 Weeks	$25.79 $23.60 $22.10 $20.25 View $20.04 $19.69 $19.68 $18.37 Quote	Min.: 1 Mult.: 1	USP	3892 K	10 kOhms		1 %	Off-Board	Wire Lead	- 55 C	+ 105 C		0.25 in	24 in	0.562 in	0.88 in	Bulk