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 (SGD) 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: $2.41 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	$2.41 $2.30 $1.94 $1.90 View $1.73 $1.54 $1.36	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: $2.22 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	$2.22 $1.94 $1.71 $1.66 View $1.58 $1.50 $1.37 $1.31 $1.21	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: $7.72 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	$7.72 $6.87 $6.19 $5.74 View $5.49 $5.24 $4.79 $4.64	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 1K OHM +/-10% SM102B1K Littelfuse 1: $2.19 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	$2.19 $2.08 $1.74 $1.70 View $1.55 $1.39 $1.30 $1.20	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 2K OHM 10% MELF SM202F1K Littelfuse 1: $2.69 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	$2.69 $2.08 $1.74 $1.70 View $1.55 $1.35 $1.29 $1.22	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 THERMISTOR, US SENSO KR104R0J Littelfuse 1: $1.58 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	$1.58 $1.18 $0.942 $0.887 View $0.865 $0.728 $0.684 $0.627	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 C THERMISTOR 10K OHM 5% 0603 SMT RB103J0J Littelfuse 1: $0.626 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	$0.626 $0.581 $0.539 $0.513 View $0.505 $0.458 $0.435 $0.393 $0.364	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 NTC THERMISTOR 5K OHM 5% 0805 SMT KR502F0J Littelfuse 1: $1.01 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	$1.01 $0.953 $0.892 $0.85 View $0.812 $0.728 $0.684 $0.597	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: $1.82 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	$1.82 $1.73 $1.63 $1.55 View $1.50 $1.35 $1.28 $1.24	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: $1.82 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	$1.82 $1.73 $1.63 $1.55 View $1.50 $1.35 $1.29 $1.20	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: $1.56 1,916In Stock 4,250Expected 5/1/2027	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	1,916In Stock 4,250Expected 5/1/2027	$1.56 $1.50 $1.40 $1.33 View $1.20 $1.16 $1.11 $1.02	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: $1.56 1,010In Stock 1,000Expected 4/11/2026	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 4/11/2026	$1.56 $1.50 $1.40 $1.33 View $1.27 $1.16 $1.11 $1.02	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: $1.66 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	$1.66 $1.58 $1.48 $1.41 View $1.28 $1.15 $1.11 $1.05	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: $0.694 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 $0.694 $0.654 $0.612 $0.581 View Reel $0.409 $0.554 $0.499 $0.476 $0.409 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: $1.82 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	$1.82 $1.73 $1.63 $1.55 View $1.50 $1.35 $1.29 $1.20	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: $0.612 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 $0.612 $0.575 $0.536 $0.51 View Reel $0.381 $0.486 $0.437 $0.413 $0.381 MouseReel Available	Min.: 1 Mult.: 1 : 3,500															Reel, Cut Tape, MouseReel
NTC (Negative Temperature Coefficient) Thermistors THERMISTOR US SENSOR BC103J1K Littelfuse 1: $4.53 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	$4.53 $3.39 $3.02 $2.87 View $2.79 $2.42 $2.34 $2.18	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: $0.612 240Expected 7/12/2026	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 7/12/2026	$0.612 $0.573 $0.533 $0.507 View $0.505 $0.453 $0.434 $0.415 $0.379	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: $2.37 250Expected 3/2/2027	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 3/2/2027	$2.37 $1.77 $1.41 $1.33 View $1.30 $1.09 $1.00 $0.925	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: $1.23 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	$1.23	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: $1.31 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	$1.31 $1.24 $1.16 $1.11 View $1.06 $0.96 $0.923 $0.85	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: $0.707 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 $0.707 $0.54 $0.465 $0.384 Reel $0.273 View $0.337 $0.324 $0.294 $0.272	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: $0.362 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	$0.362	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: $2.49 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	$2.49 $1.92 $1.60 $1.56 View $1.43 $1.28 $1.26 $1.14	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: $3.02 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	$3.02 $2.33 $1.94 $1.90 View $1.73 $1.60 $1.51 $1.48 $1.36	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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