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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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Part #

PTC Thermistors 470 OHM 50% SMD 0603

PRF18BE471QB5RB
Murata Electronics
1: ¥28.2
23,251In Stock

Mfr. Part #
PRF18BE471QB5RB

Mouser Part #
81-PRF18BE471QB5RB

Murata Electronics

PTC Thermistors 470 OHM 50% SMD 0603

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Datasheet

23,251In Stock

Cut Tape

¥28.2

¥25.6

¥22.4

¥21.3

Reel

¥14

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Mult.: 1

: 4,000

PTC Thermistors 4.7 OHM 20% SMD 0805

PRG18BC4R7MM1RB
Murata Electronics
1: ¥56.5
11,569In Stock
NRND

Mfr. Part #
PRG18BC4R7MM1RB

Mouser Part #
81-PRG18BC4R7MM1RB

NRND

Murata Electronics

PTC Thermistors 4.7 OHM 20% SMD 0805

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Datasheet

11,569In Stock

Cut Tape

¥56.5

¥52.2

¥46

¥43.7

Reel

¥28.2

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Mult.: 1

: 4,000

PTC Thermistors 470 OHM 50% SMD 0805

PRF21BC471QB5RA
Murata Electronics
1: ¥76.4
7,670In Stock

Mfr. Part #
PRF21BC471QB5RA

Mouser Part #
81-PRF21BC471QB5RA

Murata Electronics

PTC Thermistors 470 OHM 50% SMD 0805

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Datasheet

7,670In Stock

Cut Tape

¥76.4

¥65.4

¥56.5

¥46.3

Reel

¥31.1

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: 4,000

PTC Thermistors 470 OHM 50% SMD 0805

PRF21BE471QB5RA
Murata Electronics
1: ¥63.1
6,937In Stock

Mfr. Part #
PRF21BE471QB5RA

Mouser Part #
81-PRF21BE471QB5RA

Murata Electronics

PTC Thermistors 470 OHM 50% SMD 0805

Learn More

Datasheet

6,937In Stock

Cut Tape

¥63.1

¥59.1

¥52.3

¥46.3

Reel

¥32.9

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: 4,000

PTC Thermistors 470 OHM 50% SMD 0805

PRF21BA471QB5RA
Murata Electronics
1: ¥58.1
6,271In Stock

Mfr. Part #
PRF21BA471QB5RA

Mouser Part #
81-PRF21BA471QB5RA

Murata Electronics

PTC Thermistors 470 OHM 50% SMD 0805

Learn More

Datasheet

6,271In Stock

Cut Tape

¥58.1

¥54.6

¥48.2

¥45.8

Reel

¥32.6

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Mult.: 1

: 4,000

PTC Thermistors

PRF18BE471RB5RB
Murata Electronics
1: ¥68.1
3,860In Stock

Mfr. Part #
PRF18BE471RB5RB

Mouser Part #
81-PRF18BE471RB5RB

Murata Electronics

PTC Thermistors

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Datasheet

3,860In Stock

Cut Tape

¥68.1

¥63.3

¥56

¥53.3

Reel

¥38.4

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Min.: 1
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: 4,000

PTC Thermistors 470 OHM 50% SMD 0603

PRF18BC471RB5RB
Murata Electronics
1: ¥68.1
3,705In Stock

Mfr. Part #
PRF18BC471RB5RB

Mouser Part #
81-PRF18BC471RB5RB

Murata Electronics

PTC Thermistors 470 OHM 50% SMD 0603

Learn More

Datasheet

3,705In Stock

Cut Tape

¥68.1

¥63.3

¥56

¥53.3

Reel

¥39.9

View

MouseReel Available

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Mult.: 1

: 4,000

PTC Thermistors 470 OHM 50% SMD 0603

PRF18BG471RB5RB
Murata Electronics
1: ¥68.1
4,047In Stock

Mfr. Part #
PRF18BG471RB5RB

Mouser Part #
81-PRF18BG471RB5RB

Murata Electronics

PTC Thermistors 470 OHM 50% SMD 0603

Learn More

Datasheet

4,047In Stock

¥68.1

¥63.3

¥56

¥53.3

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Min.: 1
Mult.: 1

PTC Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC

PRF03BA102QB7RL
Murata Electronics
1: ¥19.9
10,500In Stock
New Product

Mfr. Part #
PRF03BA102QB7RL

Mouser Part #
81-PRF03BA102QB7RL

New Product

Murata Electronics

PTC Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC

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Datasheet

10,500In Stock

Cut Tape

¥19.9

¥18.1

¥15.9

¥13.3

View

Reel

¥9.1

Min.: 1
Mult.: 1

: 15,000

PTC Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC

PRF03BA102QS7RL
Murata Electronics
1: ¥24.9
9,100In Stock
New Product

Mfr. Part #
PRF03BA102QS7RL

Mouser Part #
81-PRF03BA102QS7RL

New Product

Murata Electronics

PTC Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC

Learn More

Datasheet

9,100In Stock

Cut Tape

¥24.9

¥21.9

¥19.3

¥15.4

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Reel

¥10.6

Min.: 1
Mult.: 1

: 15,000

PTC Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC

PRF03BD102QB7RL
Murata Electronics
1: ¥19.9
10,500In Stock
New Product

Mfr. Part #
PRF03BD102QB7RL

Mouser Part #
81-PRF03BD102QB7RL

New Product

Murata Electronics

PTC Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC

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Datasheet

10,500In Stock

Cut Tape

¥19.9

¥18.1

¥15.9

¥13.3

View

Reel

¥9.1

Min.: 1
Mult.: 1

: 15,000

PTC Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC

PRF03BD102QS7RL
Murata Electronics
1: ¥24.9
10,472In Stock
New Product

Mfr. Part #
PRF03BD102QS7RL

Mouser Part #
81-PRF03BD102QS7RL

New Product

Murata Electronics

PTC Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC

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Datasheet

10,472In Stock

Cut Tape

¥24.9

¥21.9

¥19.3

¥15.4

View

Reel

¥10.6

Min.: 1
Mult.: 1

: 15,000

PTC Thermistors 0.6x0.3mm 1kohm 115+/-5degC

PRF03BB102QB7RL
Murata Electronics
1: ¥18.3
13,599In Stock
New Product

Mfr. Part #
PRF03BB102QB7RL

Mouser Part #
81-PRF03BB102QB7RL

New Product

Murata Electronics

PTC Thermistors 0.6x0.3mm 1kohm 115+/-5degC

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Datasheet

13,599In Stock

Cut Tape

¥18.3

¥16.4

¥14.3

¥13.6

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Reel

¥8.8

Min.: 1
Mult.: 1

: 15,000

PTC Thermistors 0.6x0.3mm 1kohm 105+/-5degC

PRF03BC102QB7RL
Murata Electronics
1: ¥18.3
14,465In Stock
New Product

Mfr. Part #
PRF03BC102QB7RL

Mouser Part #
81-PRF03BC102QB7RL

New Product

Murata Electronics

PTC Thermistors 0.6x0.3mm 1kohm 105+/-5degC

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Datasheet

14,465In Stock

Cut Tape

¥18.3

¥16.4

¥14.3

¥13.6

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Reel

¥8.8

Min.: 1
Mult.: 1

: 15,000

Aluminum Organic Polymer Capacitors 15UF 25V ESR=40

ECASD31E156M040KA0
Murata Electronics
1: ¥275.7
3,464In Stock
3,000Expected 10/19/2026

Mfr. Part #
ECASD31E156M040KA0

Mouser Part #
81-ECASD31E156M040KA

Murata Electronics

Aluminum Organic Polymer Capacitors 15UF 25V ESR=40

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Datasheet

3,464In Stock

3,000Expected 10/19/2026

Cut Tape

¥275.7

¥146.5

¥133

¥112.3

¥104.8

Reel

¥99.3

Min.: 1
Mult.: 1

: 3,000

PTC Thermistors 470 OHM 50% SMD 0603

PRF18BA471QB5RB
Murata Electronics
1: ¥33.2
64,034In Stock

Mfr. Part #
PRF18BA471QB5RB

Mouser Part #
81-PRF18BA471QB5RB

Murata Electronics

PTC Thermistors 470 OHM 50% SMD 0603

Learn More

Datasheet

64,034In Stock

Cut Tape

¥33.2

¥30.1

¥22.4

¥19.3

Reel

¥14.8

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC Thermistors 100 OHM 20% SMD 0603

PRG18BB101MB1RB
Murata Electronics
1: ¥38.2
31,891In Stock
20,000Expected 8/10/2026

Mfr. Part #
PRG18BB101MB1RB

Mouser Part #
81-PRG18BB101MB1RB

Murata Electronics

PTC Thermistors 100 OHM 20% SMD 0603

Learn More

Datasheet

31,891In Stock

20,000Expected 8/10/2026

Cut Tape

¥38.2

¥34.7

¥30.6

¥29.1

Reel

¥21.3

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC Thermistors 33 OHM 20% SMD 0603

PRG18BB330MB1RB
Murata Electronics
1: ¥36.5
69,605In Stock
100,000Expected 8/4/2026

Mfr. Part #
PRG18BB330MB1RB

Mouser Part #
81-PRG18BB330MB1RB

Murata Electronics

PTC Thermistors 33 OHM 20% SMD 0603

Learn More

Datasheet

69,605In Stock

100,000Expected 8/4/2026

Cut Tape

¥36.5

¥34.2

¥30.1

¥28.4

Reel

¥19.6

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC Thermistors 33 OHM 20% SMD 0603

PRG18BB330MS1RB
Murata Electronics
1: ¥71.4
9,425In Stock

Mfr. Part #
PRG18BB330MS1RB

Mouser Part #
81-PRG18BB330MS1RB

Murata Electronics

PTC Thermistors 33 OHM 20% SMD 0603

Learn More

Datasheet

9,425In Stock

Cut Tape

¥71.4

¥66.3

¥61.8

¥58.6

View

Reel

¥42.5

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC Thermistors 0603 47ohm 20% SMD

PRG18BB470MB1RB
Murata Electronics
1: ¥54.8
88,532In Stock

Mfr. Part #
PRG18BB470MB1RB

Mouser Part #
81-PRG18BB470MB1RB

Murata Electronics

PTC Thermistors 0603 47ohm 20% SMD

Learn More

Datasheet

88,532In Stock

Cut Tape

¥54.8

¥51.3

¥45.3

¥40.9

Reel

¥30.6

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC Thermistors 470 OHM 20% SMD 0603

PRG18BB471MB1RB
Murata Electronics
1: ¥36.5
24,501In Stock
28,000Expected 9/22/2026

Mfr. Part #
PRG18BB471MB1RB

Mouser Part #
81-PRG18BB471MB1RB

Murata Electronics

PTC Thermistors 470 OHM 20% SMD 0603

Learn More

Datasheet

24,501In Stock

28,000Expected 9/22/2026

Cut Tape

¥36.5

¥34.2

¥30.1

¥28.6

Reel

¥20.6

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC Thermistors 22 OHM 20% SMD 0805

PRG21AR220MS1RK
Murata Electronics
1: ¥84.7
6,994In Stock

Mfr. Part #
PRG21AR220MS1RK

Mouser Part #
81-PRG21AR220MS1RK

Murata Electronics

PTC Thermistors 22 OHM 20% SMD 0805

Learn More

Datasheet

6,994In Stock

Cut Tape

¥84.7

¥79.6

¥70.4

¥68.1

View

Reel

¥45.2

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

PTC Thermistors 15 OHM 20% SMD 0805

PRG21BB150MB1RK
Murata Electronics
1: ¥79.7
10,449In Stock

Mfr. Part #
PRG21BB150MB1RK

Mouser Part #
81-PRG21BB150MB1RK

Murata Electronics

PTC Thermistors 15 OHM 20% SMD 0805

Learn More

Datasheet

10,449In Stock

Cut Tape

¥79.7

¥74.4

¥69.4

¥65.9

View

Reel

¥46.3

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

PTC Thermistors 0.2 OHM 20% SMD 0805

PRG21BC0R2MM1RA
Murata Electronics
1: ¥103
8,176In Stock

Mfr. Part #
PRG21BC0R2MM1RA

Mouser Part #
81-PRG21BC0R2MM1RA

Murata Electronics

PTC Thermistors 0.2 OHM 20% SMD 0805

Learn More

Datasheet

8,176In Stock

Cut Tape

¥103

¥97.2

¥90.7

¥86.4

View

Reel

¥63.8

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC Thermistors

PRG21BC3R3MM1RA
Murata Electronics
1: ¥88
5,605In Stock

Mfr. Part #
PRG21BC3R3MM1RA

Mouser Part #
81-PRG21BC3R3MM1RA

Murata Electronics

PTC Thermistors

Learn More

Datasheet

5,605In Stock

Cut Tape

¥88

¥82.6

¥77.1

¥73.4

View

Reel

¥53.8

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

POSISTOR® PTC Thermistors

All Results (65)

Circuit Protection

Passive Components