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. The Littelfuse Surface Mount Thermistors portfolio includes surface mount end-banded chip thermistors, leadless top/bottom terminated chip thermistors, inrush current limiters (power thermistors), and more.

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Qty. RoHS ECAD Model Series
B Parameter
Resistance
Power Rating
Tolerance
Mounting Style
Termination Style
Minimum Operating Temperature
Maximum Operating Temperature
Package/Case
Diameter
Length
Width
Height
Packaging
Littelfuse NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 100K OHM 0.5C MELF
Datasheet
5,416In Stock
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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, US SENSOR
Datasheet
1,322In Stock
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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, US SENSO
Datasheet
3,656In Stock
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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR
Datasheet
7In Stock
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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 10K OHM 5% 0603 SMT
Datasheet
312In Stock
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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 2K OHM 10% MELF
Datasheet
459In Stock
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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors 1K OHM +/-10%
Datasheet
691In Stock
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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 5K OHM 5% 0805 SMT
Datasheet
1,960In Stock
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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors NTC 10K OHM +/-1%
Datasheet
7,742In Stock
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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 1M OHM 10% MELF
Datasheet
118In Stock
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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, U.S. SENSOR
Datasheet
349In Stock
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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors NTC 100K OHM +/-1%
Datasheet
1,000In Stock
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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors NTC 20K OHM +/-1%
Datasheet
255In Stock
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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors 10K OHM +/-10%
Datasheet
556In Stock
Min.: 1
Mult.: 1

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 Bulk
Littelfuse NTC (Negative Temperature Coefficient) Thermistors NTC 10K OHM +/-10%
Datasheet
2,830In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, U.S. SENSOR
Datasheet
258In Stock
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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors THERMISTOR US SENSOR
Datasheet
222In Stock
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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, U.S. SENSOR
Datasheet
2,500Expected 2026/04/22
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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors C THERMISTOR 10K OHM 5% 0603 SMT
Datasheet
3,937Expected 2026/05/21
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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 10K O HM 0.5C MELF
Datasheet
Non-Stocked Lead-Time 12 Weeks
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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors THERMISTOR, US SENSOR
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 3,500
Mult.: 3,500

KR 3435 K 10 kOhms 300 mW 5 % PCB Mount SMD/SMT - 40 C + 125 C 0805 (2012 metric) 0.0787 in 0.0492 in 0.05 in
Littelfuse NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 30K OHM 5% 1206 SMT
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 1
Mult.: 1

LR 4000 K 30 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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 50K OHM 5% 1206 SMT
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 1
Mult.: 1

LR 4000 K 50 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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 10K OHM 10% MELF
Datasheet
Non-Stocked Lead-Time 12 Weeks
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
Littelfuse NTC (Negative Temperature Coefficient) Thermistors NTC THERMISTOR 10K OHM 5% 0402 SMT
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 1
Mult.: 1

RA 3800 K 10 kOhms 40 mW 5 % PCB Mount SMD/SMT - 40 C + 125 C 0402 (1005 metric) 0.0394 in 0.0197 in 0.208 in Bulk