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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Qty. RoHS ECAD Model Series
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Tolerance
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Termination Style
Minimum Operating Temperature
Maximum Operating Temperature
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Murata Electronics PTC (Positive Temperature Coefficient) 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 (Positive Temperature Coefficient) 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 (Positive Temperature Coefficient) 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 (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603
Datasheet
7 021In 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 (Positive Temperature Coefficient) 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 (Positive Temperature Coefficient) 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 (Positive Temperature Coefficient) Thermistors 33 OHM 20% SMD 0603
Datasheet
7 475In Stock
4 000Expected 14/04/2026
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 (Positive Temperature Coefficient) 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 (Positive Temperature Coefficient) 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 (Positive Temperature Coefficient) Thermistors 1 OHM 20% SMD 0603
Datasheet
4 356In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4 000

PRG18-MM1RB 1 Ohms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) 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 (Positive Temperature Coefficient) 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 (Positive Temperature Coefficient) 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 (Positive Temperature Coefficient) Thermistors
Datasheet
57 224In Stock
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 (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603
Datasheet
18 458In Stock
12 000Expected 23/04/2026
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 (Positive Temperature Coefficient) Thermistors 220 OHM 20% SMD 0603
Datasheet
29 772In Stock
16 000Expected 05/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4 000

PRG18-MB1RB 220 Ohms 20 % PCB Mount SMD/SMT - 20 C + 75 C Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 470 OHM 20% SMD 0603
Datasheet
10 674In 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 (Positive Temperature Coefficient) 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 (Positive Temperature Coefficient) Thermistors 4.7 OHM 20% SMD 0805
Datasheet
7 959In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4 000

PRG21-MM1RA 4.7 Ohms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 6.8 OHM 20% SMD 0805
Datasheet
9 847In Stock
12 000Expected 25/02/2026
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 (Positive Temperature Coefficient) 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 (Positive Temperature Coefficient) 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 (Positive Temperature Coefficient) 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 (Positive Temperature Coefficient) 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 (Positive Temperature Coefficient) 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