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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 (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603

PRF18BE471QB5RB
Murata Electronics
1: $0.17
23,251In Stock

Mfr. Part No.
PRF18BE471QB5RB

Mouser Part No
81-PRF18BE471QB5RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603

Learn More

Datasheet

23,251In Stock

Cut Tape

$0.17

$0.154

$0.135

$0.128

Reel

$0.084

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors 4.7 OHM 20% SMD 0805

PRG18BC4R7MM1RB
Murata Electronics
1: $0.34
11,599In Stock
NRND

Mfr. Part No.
PRG18BC4R7MM1RB

Mouser Part No
81-PRG18BC4R7MM1RB

NRND

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 4.7 OHM 20% SMD 0805

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Datasheet

11,599In Stock

Cut Tape

$0.34

$0.314

$0.277

$0.243

Reel

$0.159

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRG21AR220MS5RA
Murata Electronics
1: $0.99
1,054In Stock
4,000Expected 2026/09/30

Mfr. Part No.
PRG21AR220MS5RA

Mouser Part No
81-PRG21AR220MS5RA

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

1,054In Stock

4,000Expected 2026/09/30

Cut Tape

$0.99

$0.752

$0.648

$0.626

View

Reel

$0.347

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603

PRF18BG471RB5RB
Murata Electronics
1: $0.411
4,047In Stock

Mfr. Part No.
PRF18BG471RB5RB

Mouser Part No
81-PRF18BG471RB5RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603

Learn More

Datasheet

4,047In Stock

$0.411

$0.381

$0.337

$0.321

View

Min.: 1
Mult.: 1

PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0805

PRF21BA471QB5RA
Murata Electronics
1: $0.35
6,271In Stock

Mfr. Part No.
PRF21BA471QB5RA

Mouser Part No
81-PRF21BA471QB5RA

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0805

Learn More

Datasheet

6,271In Stock

Cut Tape

$0.35

$0.329

$0.29

$0.276

Reel

$0.197

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603

PRF18BC471RB5RB
Murata Electronics
1: $0.411
3,705In Stock

Mfr. Part No.
PRF18BC471RB5RB

Mouser Part No
81-PRF18BC471RB5RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603

Learn More

Datasheet

3,705In Stock

Cut Tape

$0.411

$0.381

$0.337

$0.321

Reel

$0.24

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0805

PRF21BC471QB5RA
Murata Electronics
1: $0.461
7,670In Stock

Mfr. Part No.
PRF21BC471QB5RA

Mouser Part No
81-PRF21BC471QB5RA

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0805

Learn More

Datasheet

7,670In Stock

Cut Tape

$0.461

$0.394

$0.34

$0.279

View

Reel

$0.176

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0805

PRF21BE471QB5RA
Murata Electronics
1: $0.38
6,937In Stock

Mfr. Part No.
PRF21BE471QB5RA

Mouser Part No
81-PRF21BE471QB5RA

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0805

Learn More

Datasheet

6,937In Stock

Cut Tape

$0.38

$0.356

$0.315

$0.279

Reel

$0.198

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRF18BE471RB5RB
Murata Electronics
1: $0.411
3,860In Stock

Mfr. Part No.
PRF18BE471RB5RB

Mouser Part No
81-PRF18BE471RB5RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

3,860In Stock

Cut Tape

$0.411

$0.381

$0.337

$0.321

Reel

$0.231

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC

PRF03BA102QB7RL
Murata Electronics
1: $0.12
10,500In Stock
New Product

Mfr. Part No.
PRF03BA102QB7RL

Mouser Part No
81-PRF03BA102QB7RL

New Product

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC

Learn More

Datasheet

10,500In Stock

Cut Tape

$0.12

$0.109

$0.097

$0.08

View

Reel

$0.055

Min.: 1
Mult.: 1

: 15,000

PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC

PRF03BA102QS7RL
Murata Electronics
1: $0.15
9,100In Stock
New Product

Mfr. Part No.
PRF03BA102QS7RL

Mouser Part No
81-PRF03BA102QS7RL

New Product

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC

Learn More

Datasheet

9,100In Stock

Cut Tape

$0.15

$0.133

$0.116

$0.093

View

Reel

$0.064

Min.: 1
Mult.: 1

: 15,000

PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC

PRF03BD102QB7RL
Murata Electronics
1: $0.12
10,500In Stock
New Product

Mfr. Part No.
PRF03BD102QB7RL

Mouser Part No
81-PRF03BD102QB7RL

New Product

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC

Learn More

Datasheet

10,500In Stock

Cut Tape

$0.12

$0.109

$0.097

$0.08

View

Reel

$0.055

Min.: 1
Mult.: 1

: 15,000

PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC

PRF03BD102QS7RL
Murata Electronics
1: $0.15
10,472In Stock
New Product

Mfr. Part No.
PRF03BD102QS7RL

Mouser Part No
81-PRF03BD102QS7RL

New Product

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC

Learn More

Datasheet

10,472In Stock

Cut Tape

$0.15

$0.133

$0.116

$0.093

View

Reel

$0.064

Min.: 1
Mult.: 1

: 15,000

PTC (Positive Temperature Coefficient) Thermistors 0.6x0.3mm 1kohm 115+/-5degC

PRF03BB102QB7RL
Murata Electronics
1: $0.11
13,599In Stock
New Product

Mfr. Part No.
PRF03BB102QB7RL

Mouser Part No
81-PRF03BB102QB7RL

New Product

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 0.6x0.3mm 1kohm 115+/-5degC

Learn More

Datasheet

13,599In Stock

Cut Tape

$0.11

$0.099

$0.086

$0.083

View

Reel

$0.053

Min.: 1
Mult.: 1

: 15,000

PTC (Positive Temperature Coefficient) Thermistors 0.6x0.3mm 1kohm 105+/-5degC

PRF03BC102QB7RL
Murata Electronics
1: $0.11
14,465In Stock
New Product

Mfr. Part No.
PRF03BC102QB7RL

Mouser Part No
81-PRF03BC102QB7RL

New Product

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 0.6x0.3mm 1kohm 105+/-5degC

Learn More

Datasheet

14,465In Stock

Cut Tape

$0.11

$0.099

$0.086

$0.083

View

Reel

$0.053

Min.: 1
Mult.: 1

: 15,000

Aluminium Organic Polymer Capacitors 15UF 25V ESR=40

ECASD31E156M040KA0
Murata Electronics
1: $1.64
3,969In Stock

Mfr. Part No.
ECASD31E156M040KA0

Mouser Part No
81-ECASD31E156M040KA

Murata Electronics

Aluminium Organic Polymer Capacitors 15UF 25V ESR=40

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Datasheet

3,969In Stock

Cut Tape

$1.64

$0.859

$0.78

$0.644

Reel

$0.536

View

Min.: 1
Mult.: 1

: 3,000

PTC (Positive Temperature Coefficient) Thermistors 100 OHM 20% SMD 0603

PRG18BB101MB1RB
Murata Electronics
1: $0.23
32,391In Stock
20,000Expected 2026/08/21

Mfr. Part No.
PRG18BB101MB1RB

Mouser Part No
81-PRG18BB101MB1RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 100 OHM 20% SMD 0603

Learn More

Datasheet

32,391In Stock

20,000Expected 2026/08/21

Cut Tape

$0.23

$0.209

$0.184

$0.176

Reel

$0.126

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors 33 OHM 20% SMD 0603

PRG18BB330MB1RB
Murata Electronics
1: $0.22
72,425In Stock
100,000Expected 2026/07/27

Mfr. Part No.
PRG18BB330MB1RB

Mouser Part No
81-PRG18BB330MB1RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 33 OHM 20% SMD 0603

Learn More

Datasheet

72,425In Stock

100,000Expected 2026/07/27

Cut Tape

$0.22

$0.206

$0.181

$0.171

Reel

$0.123

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors 33 OHM 20% SMD 0603

PRG18BB330MS1RB
Murata Electronics
1: $0.43
9,425In Stock

Mfr. Part No.
PRG18BB330MS1RB

Mouser Part No
81-PRG18BB330MS1RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 33 OHM 20% SMD 0603

Learn More

Datasheet

9,425In Stock

Cut Tape

$0.43

$0.399

$0.372

$0.354

View

Reel

$0.256

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors 0603 47ohm 20% SMD

PRG18BB470MB1RB
Murata Electronics
1: $0.33
16,782In Stock
72,000Expected 2026/07/27

Mfr. Part No.
PRG18BB470MB1RB

Mouser Part No
81-PRG18BB470MB1RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 0603 47ohm 20% SMD

Learn More

Datasheet

16,782In Stock

72,000Expected 2026/07/27

Cut Tape

$0.33

$0.309

$0.273

$0.247

Reel

$0.177

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors 470 OHM 20% SMD 0603

PRG18BB471MB1RB
Murata Electronics
1: $0.22
24,544In Stock
28,000Expected 2026/09/22

Mfr. Part No.
PRG18BB471MB1RB

Mouser Part No
81-PRG18BB471MB1RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 470 OHM 20% SMD 0603

Learn More

Datasheet

24,544In Stock

28,000Expected 2026/09/22

Cut Tape

$0.22

$0.206

$0.181

$0.172

Reel

$0.126

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors 22 OHM 20% SMD 0805

PRG21AR220MS1RK
Murata Electronics
1: $0.511
6,994In Stock

Mfr. Part No.
PRG21AR220MS1RK

Mouser Part No
81-PRG21AR220MS1RK

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 22 OHM 20% SMD 0805

Learn More

Datasheet

6,994In Stock

Cut Tape

$0.511

$0.479

$0.424

$0.411

View

Reel

$0.272

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

PTC (Positive Temperature Coefficient) Thermistors 15 OHM 20% SMD 0805

PRG21BB150MB1RK
Murata Electronics
1: $0.48
10,749In Stock

Mfr. Part No.
PRG21BB150MB1RK

Mouser Part No
81-PRG21BB150MB1RK

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 15 OHM 20% SMD 0805

Learn More

Datasheet

10,749In Stock

Cut Tape

$0.48

$0.448

$0.418

$0.397

View

Reel

$0.29

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

PTC (Positive Temperature Coefficient) Thermistors 0.2 OHM 20% SMD 0805

PRG21BC0R2MM1RA
Murata Electronics
1: $0.62
8,186In Stock

Mfr. Part No.
PRG21BC0R2MM1RA

Mouser Part No
81-PRG21BC0R2MM1RA

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 0.2 OHM 20% SMD 0805

Learn More

Datasheet

8,186In Stock

Cut Tape

$0.62

$0.585

$0.547

$0.52

View

Reel

$0.384

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRG21BC3R3MM1RA
Murata Electronics
1: $0.53
1,605In Stock
4,000Expected 2026/07/29

Mfr. Part No.
PRG21BC3R3MM1RA

Mouser Part No
81-PRG21BC3R3MM1RA

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

1,605In Stock

4,000Expected 2026/07/29

Cut Tape

$0.53

$0.497

$0.464

$0.442

View

Reel

$0.324

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

POSISTOR® PTC Thermistors

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POSISTOR® PTC Thermistors

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