POSISTOR® PTC Thermistors

Murata POSISTOR® Positive Temperature Coefficient (PTC) Thermistors are ideal for circuit protection in a variety of applications, such as temperature sensor and temperature compensation. These devices are also suitable for current control in common household appliances, humidifiers, dryers of all kinds, refrigerators, freezers, and air conditioners. In a conventional NTC thermistor, the resistance decreases when the temperature increases, but for the Murata PTC thermistors, the resistance rises sharply when their temperature exceeds a specific temperature.

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Description Datasheet Availability Pricing (CAD) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Series
Resistance
Tolerance
Mounting Style
Termination Style
Minimum Operating Temperature
Maximum Operating Temperature
Qualification
Packaging
Murata Electronics PTC Thermistors 1 OHM 20% SMD 0805
Datasheet
8,231In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG21-MM1RA 1 Ohms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 470 OHM 50% SMD 0603
Datasheet
7,031In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRF 470 Ohms 50 % PCB Mount SMD/SMT - 20 C + 140 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 470 OHM 50% SMD 0603
Datasheet
7,705In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRF 470 Ohms 50 % PCB Mount SMD/SMT - 20 C + 130 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 470 OHM 50% SMD 0603
Datasheet
3,855In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRF 470 Ohms 50 % PCB Mount SMD/SMT - 20 C + 130 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors
Datasheet
4,380In Stock
Min.: 1
Mult.: 1
Reel: 4,000

PRG21-MS5RA 22 Ohms 20 % PCB Mount SMD/SMT - 40 C + 105 C Reel, Cut Tape
Murata Electronics PTC Thermistors 0.6x0.3mm 1kohm 115+/-5degC
Datasheet
13,599In Stock
Min.: 1
Mult.: 1
Reel: 15,000

PRF 1 kOhms 50 % PCB Mount SMD/SMT - 40 C + 140 C Reel, Cut Tape
Murata Electronics PTC Thermistors 0.6x0.3mm 1kohm 105+/-5degC
Datasheet
14,465In Stock
Min.: 1
Mult.: 1
Reel: 15,000

PRF 1 kOhms 50 % PCB Mount SMD/SMT - 40 C + 130 C Reel, Cut Tape
Murata Electronics PTC Thermistors 33 OHM 20% SMD 0603
Datasheet
7,485In Stock
4,000Expected 2026-04-14
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG18-MS1RB 33 Ohms 20 % PCB Mount SMD/SMT - 40 C + 75 C AEC-Q100 Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 22 OHM 20% SMD 0805
Datasheet
10,664In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

PRG21-MS1RK 22 Ohms 20 % PCB Mount SMD/SMT - 40 C + 105 C AEC-Q100 Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 22 OHM 20% SMD 0805
Datasheet
9,233In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

PRG21-MB1RK 22 Ohms 20 % PCB Mount SMD/SMT - 10 C + 60 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 2.2 OHM 20% SMD 0603
Datasheet
9In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG18-MM1RB 2.2 Ohms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 3.3 OHM 20% SMD 0603
Datasheet
1,967In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG18-MM1RB 3.3 Ohms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 4.7 OHM 20% SMD 0805
Datasheet
13,055In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG18-MM1RB 4.7 Ohms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors
Datasheet
30,224In Stock
30,000Expected 2026-02-18
MouseReel Available
Min.: 1
Mult.: 1
Reel: 10,000

PRF 1 kOhms 50 % PCB Mount SMD/SMT - 40 C + 140 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 470 OHM 50% SMD 0603
Datasheet
18,518In Stock
12,000Expected 2026-04-23
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRF 470 Ohms 50 % PCB Mount SMD/SMT - 20 C + 150 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 470 OHM 20% SMD 0603
Datasheet
11,467In Stock
32,000On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG18-MB1RB 47 Ohms 20 % PCB Mount SMD/SMT - 20 C + 75 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 15 OHM 20% SMD 0805
Datasheet
11,381In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

PRG21-MB1RK 15 Ohms 20 % PCB Mount SMD/SMT - 10 C + 60 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 6.8 OHM 20% SMD 0805
Datasheet
13,857In Stock
12,000Expected 2026-02-23
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG21-MM1RA 6.8 Ohms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors PTC 0402, 10kOhms, 50%, 32VDC
Datasheet
12,597In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 10,000

PRF 10 kOhms 50 % PCB Mount SMD/SMT - 20 C + 140 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 1 OHM 50% SMD 0402
Datasheet
8,335In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 10,000

PRF 1 kOhms 50 % PCB Mount SMD/SMT - 40 C + 120 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors
Datasheet
3,520In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRF 470 Ohms 50 % PCB Mount SMD/SMT - 20 C + 160 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors
Datasheet
3,144In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRF 470 Ohms 50 % PCB Mount SMD/SMT - 20 C + 140 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 470 OHM 50% SMD 0603
Datasheet
9,713In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRF 470 Ohms 50 % PCB Mount SMD/SMT - 20 C + 120 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors
Datasheet
2,171In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRF 470 Ohms 50 % PCB Mount SMD/SMT - 20 C + 120 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors
Datasheet
1,694In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRF 470 Ohms 50 % PCB Mount SMD/SMT - 20 C + 100 C Reel, Cut Tape, MouseReel