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 (IDR) 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: Rp32.472,42 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	Rp32.472,42 Rp31.004,74 Rp26.234,78 Rp25.684,40 View Rp23.299,42 Rp20.730,98 Rp18.346,00	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: Rp27.519,00 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	Rp27.519,00 Rp25.134,02 Rp22.749,04 Rp21.831,74 View Rp21.281,36 Rp19.630,22 Rp18.529,46 Rp17.722,24 Rp16.364,63	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: Rp104.205,28 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	Rp104.205,28 Rp92.647,30 Rp83.474,30 Rp77.420,12 View Rp74.117,84 Rp70.632,10 Rp70.448,64 Rp64.577,92 Rp62.559,86	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: Rp36.325,08 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	Rp36.325,08 Rp28.069,38 Rp23.482,88 Rp22.932,50 View Rp20.914,44 Rp18.180,89 Rp17.392,01 Rp16.474,71	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: Rp29.537,06 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	Rp29.537,06 Rp28.069,38 Rp23.482,88 Rp22.932,50 View Rp20.914,44 Rp18.712,92 Rp17.575,47 Rp16.236,21	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: Rp8.439,16 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	Rp8.439,16 Rp7.833,74 Rp7.265,02 Rp6.916,44 View Rp6.806,37 Rp6.182,60 Rp5.870,72 Rp5.301,99 Rp4.916,73	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: Rp21.281,36 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	Rp21.281,36 Rp15.905,98 Rp12.713,78 Rp11.961,59 View Rp11.668,06 Rp9.815,11 Rp9.228,04 Rp8.457,51	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: Rp13.576,04 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	Rp13.576,04 Rp12.860,55 Rp12.034,98 Rp11.466,25 View Rp10.952,56 Rp10.934,22 Rp9.815,11 Rp9.228,04 Rp7.907,13	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: Rp24.583,64 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	Rp24.583,64 Rp23.299,42 Rp22.015,20 Rp20.914,44 View Rp20.180,60 Rp18.180,89 Rp17.208,55 Rp16.786,59	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: Rp24.583,64 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	Rp24.583,64 Rp23.299,42 Rp22.015,20 Rp20.914,44 View Rp20.180,60 Rp18.180,89 Rp17.392,01 Rp16.236,21	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: Rp21.097,90 2.166In Stock 4.000Expected 05/01/2027	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	2.166In Stock 4.000Expected 05/01/2027	Rp21.097,90 Rp20.180,60 Rp18.896,38 Rp17.960,73 View Rp16.236,21 Rp15.612,45 Rp14.915,30 Rp13.759,50	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: Rp21.097,90 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	Rp21.097,90 Rp20.180,60 Rp18.896,38 Rp17.960,73 View Rp17.190,20 Rp15.612,45 Rp14.915,30 Rp13.759,50	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: Rp22.382,12 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	Rp22.382,12 Rp21.281,36 Rp19.997,14 Rp19.079,84 View Rp17.226,89 Rp15.465,68 Rp14.915,30 Rp14.144,77	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: Rp9.356,46 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 Rp9.356,46 Rp8.824,43 Rp8.255,70 Rp7.833,74 View Reel Rp5.522,15 Rp7.466,82 Rp6.732,98 Rp6.421,10 Rp5.522,15 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: Rp24.583,64 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	Rp24.583,64 Rp23.299,42 Rp22.015,20 Rp20.914,44 View Rp20.180,60 Rp18.180,89 Rp17.392,01 Rp16.236,21	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: Rp8.255,70 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 Rp8.255,70 Rp7.760,36 Rp7.228,32 Rp6.879,75 View Reel Rp5.136,88 Rp6.549,52 Rp5.889,07 Rp5.577,18 Rp5.136,88 MouseReel Available	Min.: 1 Mult.: 1 : 3.500															Reel, Cut Tape, MouseReel
NTC (Negative Temperature Coefficient) Thermistors THERMISTOR US SENSOR BC103J1K Littelfuse 1: Rp61.092,18 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	Rp61.092,18 Rp45.681,54 Rp40.728,12 Rp38.710,06 View Rp37.609,30 Rp32.655,88 Rp31.555,12 Rp29.353,60	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: Rp8.255,70 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	Rp8.255,70 Rp7.723,67 Rp7.191,63 Rp6.843,06 View Rp6.806,37 Rp6.109,22 Rp5.852,37 Rp5.595,53 Rp5.118,53	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: Rp31.922,04 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	Rp31.922,04 Rp23.849,80 Rp19.079,84 Rp17.942,39 View Rp17.502,08 Rp17.483,74 Rp14.695,15 Rp13.539,35 Rp12.475,28	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: Rp16.529,75 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	Rp16.529,75	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: Rp17.612,16 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	Rp17.612,16 Rp16.713,21 Rp15.667,48 Rp14.933,64 View Rp14.291,53 Rp12.952,28 Rp12.456,93 Rp11.466,25	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: Rp9.539,92 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 Rp9.539,92 Rp7.283,36 Rp6.274,33 Rp5.173,57 Reel Rp3.687,55 View Rp4.549,81 Rp4.366,35 Rp3.962,74 Rp3.669,20	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: Rp4.880,04 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	Rp4.880,04	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: Rp33.573,18 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	Rp33.573,18 Rp25.867,86 Rp21.648,28 Rp21.097,90 View Rp19.263,30 Rp17.263,59 Rp17.061,78 Rp15.318,91	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: Rp40.728,12 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	Rp40.728,12 Rp31.371,66 Rp26.234,78 Rp25.684,40 View Rp23.299,42 Rp21.648,28 Rp20.364,06 Rp19.997,14 Rp18.346,00	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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