NTC (Negative Temperature Coefficient) Thermistors

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Surface-Mount Thermistors

Littelfuse Surface-Mount Thermistors offer a 0.7Ω to 500,000Ω resistance range and a maximum operating range of -55°C to +220°C. This Littelfuse portfolio includes end-banded chip thermistors, leadless top- and bottom-terminated chip thermistors, inrush current limiters (power thermistors), and more. These surface-mount modules are ideal for a wide variety of applications.

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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	Package/Case	Diameter	Length	Width	Height	Packaging
NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, U.S. SENSOR SM103J1F Littelfuse 1: €1.52 2,500In Stock	Mfr. Part No. SM103J1F Mouser Part No 576-SM103J1F	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, U.S. SENSOR Learn More about Littelfuse surface mount thermistors	Datasheet	2,500In Stock	€1.52 €1.45 €1.23 €1.20 View €1.09 €0.972 €0.86	Min.: 1 Mult.: 1		3892 K	10 kOhms		1 %	PCB Mount	SMD/SMT	- 55 C	+ 220 C	MiniMELF-2	0.06 in	0.135 in	0.06 in	0.06 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 100K OHM 0.5C MELF HM104J1A Littelfuse 1: €1.29 5,170In Stock	Mfr. Part No. HM104J1A Mouser Part No 576-HM104J1A	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 100K OHM 0.5C MELF Learn More about Littelfuse surface mount thermistors	Datasheet	5,170In Stock	€1.29 €1.18 €1.07 €1.02 View €0.998 €0.92 €0.869 €0.831 €0.767	Min.: 1 Mult.: 1	HM	3892 K	100 kOhms		0.5 %	PCB Mount	SMD/SMT	- 55 C	+ 220 C	MiniMELF-2	0.0603 in	0.135 in	0.0603 in	0.0603 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, US SENSOR WM103J1B Littelfuse 1: €4.88 2,756In Stock	Mfr. Part No. WM103J1B Mouser Part No 803-WM103J1B	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, US SENSOR Learn More about Littelfuse surface mount thermistors	Datasheet	2,756In Stock	€4.88 €4.34 €3.91 €3.63 View €3.47 €3.31 €3.30 €3.03 €2.93	Min.: 1 Mult.: 1	WM	3892 K	10 kOhms		1 C	PCB Mount	SMD/SMT	- 55 C	+ 220 C		0.06 in	0.135 in	0.06 in	0.06 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 2K OHM 10% MELF SM202F1K Littelfuse 1: €1.70 459In Stock	Mfr. Part No. SM202F1K Mouser Part No 576-SM202F1K	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 2K OHM 10% MELF Learn More about Littelfuse surface mount thermistors	Datasheet	459In Stock	€1.70 €1.32 €1.10 €1.08 View €0.98 €0.852 €0.815 €0.772	Min.: 1 Mult.: 1	SM	3419 K	2 kOhms		10 %	PCB Mount	SMD/SMT	- 55 C	+ 220 C	MiniMELF-2	0.06 in	0.135 in	0.06 in	0.06 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors 1K OHM +/-10% SM102B1K Littelfuse 1: €1.38 691In Stock	Mfr. Part No. SM102B1K Mouser Part No 803-SM102B1K	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors 1K OHM +/-10% Learn More about Littelfuse surface mount thermistors	Datasheet	691In Stock	€1.38 €1.32 €1.10 €1.08 View €0.98 €0.877 €0.824 €0.761	Min.: 1 Mult.: 1	SM	2941 K	1 kOhms		10 %	PCB Mount	SMD/SMT	- 55 C	+ 220 C		0.06 in	0.135 in	0.06 in	0.06 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors C THERMISTOR 10K OHM 5% 0603 SMT RB103J0J Littelfuse 1: €0.396 2,709In Stock	Mfr. Part No. RB103J0J Mouser Part No 576-RB103J0J	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors C THERMISTOR 10K OHM 5% 0603 SMT Learn More about Littelfuse surface mount thermistors	Datasheet	2,709In Stock	€0.396 €0.367 €0.341 €0.324 View €0.319 €0.29 €0.275 €0.249 €0.23	Min.: 1 Mult.: 1		3976 K	10 kOhms		5 %	PCB Mount	SMD/SMT	- 40 C	+ 125 C	0603 (1608 metric)		0.063 in	0.0315 in	0.0395 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, US SENSO KR104R0J Littelfuse 1: €0.998 3,493In Stock	Mfr. Part No. KR104R0J Mouser Part No 576-KR104R0J	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, US SENSO Learn More about Littelfuse surface mount thermistors	Datasheet	3,493In Stock	€0.998 €0.746 €0.596 €0.561 View €0.547 €0.46 €0.433 €0.396	Min.: 1 Mult.: 1	KR	4250 K	100 kOhms	300 mW	5 %	PCB Mount	SMD/SMT	- 40 C	+ 125 C	0805 (2012 metric)		0.0787 in	0.0492 in	0.05 in
NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 5K OHM 5% 0805 SMT KR502F0J Littelfuse 1: €0.636 3,391In Stock	Mfr. Part No. KR502F0J Mouser Part No 576-KR502F0J	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 5K OHM 5% 0805 SMT Learn More about Littelfuse surface mount thermistors	Datasheet	3,391In Stock	€0.636 €0.603 €0.564 €0.538 View €0.513 €0.46 €0.433 €0.371	Min.: 1 Mult.: 1	KR	3550 K	5 kOhms	300 mW	5 %	PCB Mount	SMD/SMT	- 40 C	+ 125 C	0805 (2012 metric)		0.0787 in	0.0492 in	0.05 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 1M OHM 10% MELF SM105R1K Littelfuse 1: €1.15 118In Stock	Mfr. Part No. SM105R1K Mouser Part No 576-SM105R1K	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 1M OHM 10% MELF Learn More about Littelfuse surface mount thermistors	Datasheet	118In Stock	€1.15 €1.09 €1.03 €0.98 View €0.946 €0.852 €0.807 €0.787	Min.: 1 Mult.: 1	SM	4140 K	1 mOhms		10 %	PCB Mount	SMD/SMT	- 55 C	+ 220 C	MiniMELF-2	0.06 in	0.135 in	0.06 in	0.06 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, U.S. SENSOR SM303J1K Littelfuse 1: €1.15 349In Stock	Mfr. Part No. SM303J1K Mouser Part No 576-SM303J1K	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, U.S. SENSOR Learn More about Littelfuse surface mount thermistors	Datasheet	349In Stock	€1.15 €1.09 €1.03 €0.98 View €0.946 €0.852 €0.815 €0.761	Min.: 1 Mult.: 1	SM	3892 K	30 kOhms		10 %	PCB Mount	SMD/SMT	- 55 C	+ 220 C	MiniMELF-2	0.06 in	0.135 in	0.06 in	0.06 in
NTC (Negative Temperature Coefficient) Thermistors NTC 10K OHM +/-1% MM103J1F Littelfuse 1: €0.989 1,916In Stock 4,250On Order	Mfr. Part No. MM103J1F Mouser Part No 803-MM103J1F	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors NTC 10K OHM +/-1% Learn More about Littelfuse surface mount thermistors	Datasheet	1,916In Stock 4,250On Order On Order Ship Dates Mfr. No: MM103J1F Stock: 1,916 Can Dispatch Immediately On Order: 250 Expected 06/11/2026 4,000 Expected 05/01/2027 Factory Lead Time: 12 Weeks	€0.989 €0.946 €0.886 €0.842 View €0.761 €0.732 €0.699 €0.645	Min.: 1 Mult.: 1	MM	3892 K	10 kOhms		1 %	PCB Mount	SMD/SMT	- 55 C	+ 220 C		0.053 in	0.075 in	0.053 in	0.049 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors NTC 100K OHM +/-1% MM104J1F Littelfuse 1: €0.989 1,010In Stock 1,000Expected 04/11/2026	Mfr. Part No. MM104J1F Mouser Part No 803-MM104J1F	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors NTC 100K OHM +/-1% Learn More about Littelfuse surface mount thermistors	Datasheet	1,010In Stock 1,000Expected 04/11/2026	€0.989 €0.946 €0.886 €0.842 View €0.806 €0.732 €0.699 €0.645	Min.: 1 Mult.: 1	MM	3892 K	100 kOhms		1 %	PCB Mount	SMD/SMT	- 55 C	+ 220 C		0.053 in	0.075 in	0.053 in	0.049 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors NTC 20K OHM +/-1% MM203J1F Littelfuse 1: €1.05 55In Stock	Mfr. Part No. MM203J1F Mouser Part No 803-MM203J1F	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors NTC 20K OHM +/-1% Learn More about Littelfuse surface mount thermistors	Datasheet	55In Stock	€1.05 €0.998 €0.937 €0.894 View €0.808 €0.725 €0.699 €0.663	Min.: 1 Mult.: 1	MM	3892 K	20 kOhms		1 %	PCB Mount	SMD/SMT	- 55 C	+ 220 C	MicroMELF-2	0.053 in	0.075 in			Bulk
NTC (Negative Temperature Coefficient) Thermistors NTC 10K OHM +/-10% SM103J1K-TR Littelfuse 1: €0.439 2,566In Stock	Mfr. Part No. SM103J1K-TR Mouser Part No 803-SM103J1K-TR	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors NTC 10K OHM +/-10% Learn More about Littelfuse industrial portfolio	Datasheet	2,566In Stock	Cut Tape €0.439 €0.414 €0.387 €0.367 View Reel €0.259 €0.35 €0.316 €0.301 €0.259 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	SM	3892 K	10 kOhms		10 %	PCB Mount	SMD/SMT	- 55 C	+ 220 C		0.06 in	0.135 in	0.06 in	0.06 in	Reel, Cut Tape, MouseReel
NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, U.S. SENSOR SM502F1K Littelfuse 1: €1.15 103In Stock	Mfr. Part No. SM502F1K Mouser Part No 803-SM502F1K	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, U.S. SENSOR Learn More about Littelfuse surface mount thermistors	Datasheet	103In Stock	€1.15 €1.09 €1.03 €0.98 View €0.946 €0.852 €0.815 €0.761	Min.: 1 Mult.: 1	SM	3419 K	5 kOhms		10 %	PCB Mount	SMD/SMT	- 55 C	+ 220 C		0.06 in	0.135 in	0.06 in	0.06 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors NTC THRM CHIP 3750 10K 5% TR KR103G0J-TR Littelfuse 1: €0.387 2,671In Stock	Mfr. Part No. KR103G0J-TR Mouser Part No 576-KR103G0J-TR	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors NTC THRM CHIP 3750 10K 5% TR Learn More about Littelfuse surface mount thermistors	Datasheet	2,671In Stock	Cut Tape €0.387 €0.364 €0.339 €0.323 View Reel €0.241 €0.307 €0.276 €0.261 €0.241 MouseReel Available	Min.: 1 Mult.: 1 : 3,500															Reel, Cut Tape, MouseReel
NTC (Negative Temperature Coefficient) Thermistors THERMISTOR US SENSOR BC103J1K Littelfuse 1: €2.86 172In Stock	Mfr. Part No. BC103J1K Mouser Part No 803-BC103J1K	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors THERMISTOR US SENSOR Learn More about Littelfuse surface mount thermistors	Datasheet	172In Stock	€2.86 €2.14 €1.91 €1.81 View €1.76 €1.53 €1.48 €1.38	Min.: 1 Mult.: 1	BC	3892 K	10 kOhms		10 %	PCB Mount	SMD/SMT	- 55 C	+ 150 C			0.04 in	0.04 in	0.015 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 10K OHM 5% 0603 SMT RB103E0J Littelfuse 1: €0.387 240Expected 07/12/2026	Mfr. Part No. RB103E0J Mouser Part No 576-RB103E0J	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 10K OHM 5% 0603 SMT Learn More about Littelfuse rb thermistors	Datasheet	240Expected 07/12/2026	€0.387 €0.362 €0.337 €0.321 View €0.319 €0.286 €0.274 €0.262 €0.24	Min.: 1 Mult.: 1	RB	3435 K	10 kOhms	150 mW	5 %	PCB Mount	SMD/SMT	- 40 C	+ 125 C	0603 (1608 metric)		0.063 in	0.0315 in	0.0395 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 1K OHM 5% 1206 SMT LR102D0J Littelfuse 1: €1.50 250Expected 03/02/2027	Mfr. Part No. LR102D0J Mouser Part No 576-LR102D0J	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 1K OHM 5% 1206 SMT Learn More about Littelfuse surface mount thermistors	Datasheet	250Expected 03/02/2027	€1.50 €1.12 €0.894 €0.841 View €0.82 €0.689 €0.635 €0.585	Min.: 1 Mult.: 1	LR	3250 K	1 kOhms	400 mW	5 %	PCB Mount	SMD/SMT	- 40 C	+ 125 C	1206 (3216 metric)		0.126 in	0.063 in	0.05 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 10K O HM 0.5C MELF HM103J1A Littelfuse 2,500: €0.775 Non-Stocked Lead-Time 12 Weeks	Mfr. Part No. HM103J1A Mouser Part No 576-HM103J1A	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 10K O HM 0.5C MELF Learn More about Littelfuse surface mount thermistors	Datasheet	Non-Stocked Lead-Time 12 Weeks	€0.775	Min.: 2,500 Mult.: 2,500	HM	3892 K	10 kOhms		0.5 %	PCB Mount	SMD/SMT	- 55 C	+ 220 C	MiniMELF-2	0.0603 in	0.135 in			Bulk
NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 10K OHM 10% MELF MM103J1K Littelfuse 1: €0.826 Non-Stocked Lead-Time 12 Weeks	Mfr. Part No. MM103J1K Mouser Part No 576-MM103J1K	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 10K OHM 10% MELF Learn More about Littelfuse surface mount thermistors	Datasheet	Non-Stocked Lead-Time 12 Weeks	€0.826 €0.783 €0.734 €0.70 View €0.67 €0.607 €0.584 €0.538	Min.: 1 Mult.: 1	MM	3892 K	10 kOhms		10 %	PCB Mount	SMD/SMT	- 55 C	+ 220 C	MicroMELF-2	0.053 in	0.075 in	0.053 in	0.049 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors THERMISTOR RA103J0Q-TR Littelfuse 1: €0.447 Non-Stocked Lead-Time 12 Weeks	Mfr. Part No. RA103J0Q-TR Mouser Part No 576-RA103J0Q-TR	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors THERMISTOR Learn More about Littelfuse surface mount thermistors	Datasheet	Non-Stocked Lead-Time 12 Weeks	Cut Tape €0.447 €0.341 €0.294 €0.243 Reel €0.173 View €0.213 €0.205 €0.186 €0.172	Min.: 1 Mult.: 1 : 10,000	RA	3900 K	10 kOhms		1 %	PCB Mount	SMD/SMT	- 40 C	+ 125 C			0.0394 in	0.0197 in	0.028 in	Reel, Cut Tape
NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 10K OHM 5% 0603 SMT RB103K0J Littelfuse 4,000: €0.229 Non-Stocked Lead-Time 12 Weeks	Mfr. Part No. RB103K0J Mouser Part No 576-RB103K0J	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 10K OHM 5% 0603 SMT Learn More about Littelfuse rb thermistors	Datasheet	Non-Stocked Lead-Time 12 Weeks	€0.229	Min.: 4,000 Mult.: 4,000	RB	4000 K	10 kOhms	150 mW	5 %	PCB Mount	SMD/SMT	- 40 C	+ 125 C	0603 (1608 metric)		0.063 in	0.0315 in	0.0395 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR SB102F1K Littelfuse 1: €1.57 Non-Stocked Lead-Time 12 Weeks	Mfr. Part No. SB102F1K Mouser Part No 576-SB102F1K	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR Learn More about Littelfuse surface mount thermistors	Datasheet	Non-Stocked Lead-Time 12 Weeks	€1.57 €1.21 €1.01 €0.989 View €0.903 €0.809 €0.80 €0.718	Min.: 1 Mult.: 1	SB	3419 K	1 kOhms		10 %	PCB Mount	SMD/SMT	- 55 C	+ 220 C	MELF-2	0.096 in	0.135 in	0.06 in	0.096 in	Bulk
NTC (Negative Temperature Coefficient) Thermistors CUSTOM TEMPERATURE SENSOR SM104J1F Littelfuse 1: €1.91 Non-Stocked Lead-Time 12 Weeks	Mfr. Part No. SM104J1F Mouser Part No 576-SM104J1F	Littelfuse	NTC (Negative Temperature Coefficient) Thermistors CUSTOM TEMPERATURE SENSOR Learn More about Littelfuse surface mount thermistors	Datasheet	Non-Stocked Lead-Time 12 Weeks	€1.91 €1.47 €1.23 €1.20 View €1.09 €1.01 €0.955 €0.937 €0.86	Min.: 1 Mult.: 1		3892 K	100 kOhms		1 %	PCB Mount	SMD/SMT	- 55 C	+ 220 C	MiniMELF-2	0.06 in	0.135 in

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