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 NTC THERMISTOR 100K OHM 0.5C MELF HM104J1A Littelfuse 1: 1,29 € 5.199In 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	5.199In Stock	1,29 € 1,18 € 1,07 € 1,02 € View 0,998 € 0,903 € 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 € 3,03 € 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 NTC THERMISTOR 5K OHM 5% 0805 SMT KR502F0J Littelfuse 1: 0,636 € 3.475In 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	3.475In 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 C THERMISTOR 10K OHM 5% 0603 SMT RB103J0J Littelfuse 1: 0,396 € 3.845In 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	3.845In 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 THERMISTOR, U.S. SENSOR SM103J1F Littelfuse 1: 1,52 € 2.450In Stock 2.500Expected 10/5/2026	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	2.450In Stock 2.500Expected 10/5/2026	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 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 € 1.992In Stock 4.250Expected 1/5/2027	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	1.992In Stock 4.250Expected 1/5/2027	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 € 10In Stock 2.000On Order	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	10In Stock 2.000On Order On Order Ship Dates Mfr. No: MM104J1F Stock: 10 Can Dispatch Immediately On Order: 700 Expected 10/8/2026 300 Expected 10/23/2026 1.000 Expected 12/22/2026 Factory Lead Time: 12 Weeks	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: 0,989 € 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	0,989 € 0,946 € 0,886 € 0,842 € View 0,761 € 0,716 € 0,686 € 0,645 €	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 € 2.578In 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	2.578In Stock	Cut Tape 0,439 € 0,414 € 0,387 € 0,367 € View Reel 0,26 € 0,35 € 0,316 € 0,301 € 0,26 € 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 € 3.219In 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	3.219In 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: 0,593 € 240Expected 12/7/2026	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 12/7/2026	0,593 € 0,451 € 0,388 € 0,374 € View 0,319 € 0,305 € 0,277 € 0,264 € 0,23 €	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 1/27/2027	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 1/27/2027	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: 0,767 € 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	0,767 €	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 10.000: 0,173 € 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	Reel 0,173 € 0,172 €	Min.: 10.000 Mult.: 10.000 : 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
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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