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 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
1,544In 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
Murata Electronics PTC Thermistors 470 OHM 50% SMD 0805
Datasheet
1,880In 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
1,210In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRF 470 Ohms 50 % PCB Mount SMD/SMT - 20 C + 110 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 100 OHM 20% SMD 0603
Datasheet
2,883In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG18-MS1RB 100 Ohms 20 % PCB Mount SMD/SMT - 40 C + 75 C AEC-Q100 Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 470 OHM 20% SMD 0603
Datasheet
92In Stock
16,000On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG18-MB1RB 470 Ohms 20 % PCB Mount SMD/SMT - 20 C + 75 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 42 OHM 20% SMD 0805
Datasheet
1,584In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG21-MS1RA 42 Ohms 20 % PCB Mount SMD/SMT - 40 C + 105 C AEC-Q100 Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors
Datasheet
2,808In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG21-MM1RA 3.3 Ohms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 6.8 OHM 20% SMD 0603
Datasheet
3,934In Stock
8,000Expected 2026-05-04
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG18-MM1RB 6.8 Ohms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors
Datasheet
7,781In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 10,000

PRF 1 kOhms 50 % PCB Mount SMD/SMT - 40 C + 130 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 470 OHM 50% SMD 0603
Datasheet
5,170In 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 470 OHM 50% SMD 0603
Datasheet
16,056In Stock
8,000Expected 2026-04-14
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRF 470 Ohms 50 % PCB Mount SMD/SMT - 20 C + 110 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 470 OHM 50% SMD 0603
Datasheet
7,560In Stock
8,000Expected 2026-04-14
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
Murata Electronics PTC Thermistors 470 OHM 50% SMD 0603
Datasheet
2,300In Stock
12,000Expected 2026-04-16
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRF 470 Ohms 50 % PCB Mount SMD/SMT - 20 C + 90 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 470 OHM 50% SMD 0603
Datasheet
4,077In Stock
Min.: 1
Mult.: 1

PRF 470 Ohms 50 % PCB Mount SMD/SMT - 20 C + 90 C Bulk
Murata Electronics PTC Thermistors 470 OHM 50% SMD 0805
Datasheet
2,421In Stock
4,000Expected 2026-03-06
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 0805
Datasheet
3,850In Stock
4,000Expected 2026-06-01
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 470 OHM 50% SMD 0805
Datasheet
3,392In Stock
4,000Expected 2026-04-14
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
Murata Electronics PTC Thermistors 100 OHM 20% SMD 0603
Datasheet
12,320In Stock
8,000Expected 2026-05-01
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG18-MB1RB 100 Ohms 20 % PCB Mount SMD/SMT - 20 C + 75 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 33 OHM 20% SMD 0603
Datasheet
131In Stock
55,700On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG18-MB1RB 33 Ohms 20 % PCB Mount SMD/SMT - 20 C + 75 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 42 OHM 20% SMD 0805
Datasheet
3,930In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG21-MB1RA 42 Ohms 20 % PCB Mount SMD/SMT - 10 C + 60 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 0.2 OHM 20% SMD 0805
Datasheet
2,491In Stock
4,000Expected 2026-04-13
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG21-MM1RA 200 mOhms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 0.6 OHM 20% SMD 0805
Datasheet
475In Stock
4,000Expected 2026-03-12
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG21-MM1RA 600 mOhms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel
Murata Electronics PTC Thermistors 2.2 OHM 20% SMD 0805
Datasheet
3,723In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG21-MM1RA 2.2 Ohms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel