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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

PRF18BD471RB5RB
Murata Electronics
1: $0.605
2,171In Stock

Mfr. Part #
PRF18BD471RB5RB

Mouser Part #
81-PRF18BD471RB5RB

Murata Electronics

PTC Thermistors

Learn More

Datasheet

2,171In Stock

Cut Tape

$0.605

$0.567

$0.502

$0.477

Reel

$0.363

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors

PRF18BF471RB5RB
Murata Electronics
1: $0.62
1,694In Stock

Mfr. Part #
PRF18BF471RB5RB

Mouser Part #
81-PRF18BF471RB5RB

Murata Electronics

PTC Thermistors

Learn More

Datasheet

1,694In Stock

Cut Tape

$0.62

$0.578

$0.513

$0.488

Reel

$0.367

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors 470 OHM 50% SMD 0805

PRF21BB471QB5RA
Murata Electronics
1: $0.45
1,880In Stock

Mfr. Part #
PRF21BB471QB5RA

Mouser Part #
81-PRF21BB471QB5RA

Murata Electronics

PTC Thermistors 470 OHM 50% SMD 0805

Learn More

Datasheet

1,880In Stock

Cut Tape

$0.45

$0.403

$0.381

$0.372

Reel

$0.256

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors

PRF21BD471QB5RA
Murata Electronics
1: $0.682
1,710In Stock

Mfr. Part #
PRF21BD471QB5RA

Mouser Part #
81-PRF21BD471QB5RA

Murata Electronics

PTC Thermistors

Learn More

Datasheet

1,710In Stock

Cut Tape

$0.682

$0.626

$0.547

$0.487

Reel

$0.315

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors 100 OHM 20% SMD 0603

PRG18BB101MS1RB
Murata Electronics
1: $0.651
2,883In Stock

Mfr. Part #
PRG18BB101MS1RB

Mouser Part #
81-PRG18BB101MS1RB

Murata Electronics

PTC Thermistors 100 OHM 20% SMD 0603

Learn More

Datasheet

2,883In Stock

Cut Tape

$0.651

$0.606

$0.566

$0.538

View

Reel

$0.394

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors 470 OHM 20% SMD 0603

PRG18BB471MB1RB
Murata Electronics
1: $0.326
129In Stock
16,000On Order

Mfr. Part #
PRG18BB471MB1RB

Mouser Part #
81-PRG18BB471MB1RB

Murata Electronics

PTC Thermistors 470 OHM 20% SMD 0603

Learn More

Datasheet

129In Stock

16,000On Order

Cut Tape

$0.326

$0.307

$0.27

$0.256

Reel

$0.163

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors 42 OHM 20% SMD 0805

PRG21AR420MS1RA
Murata Electronics
1: $0.636
1,584In Stock

Mfr. Part #
PRG21AR420MS1RA

Mouser Part #
81-PRG21AR420MS1RA

Murata Electronics

PTC Thermistors 42 OHM 20% SMD 0805

Learn More

Datasheet

1,584In Stock

Cut Tape

$0.636

$0.595

$0.555

$0.527

View

Reel

$0.383

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors

PRG21BC3R3MM1RA
Murata Electronics
1: $0.791
2,808In Stock

Mfr. Part #
PRG21BC3R3MM1RA

Mouser Part #
81-PRG21BC3R3MM1RA

Murata Electronics

PTC Thermistors

Learn More

Datasheet

2,808In Stock

Cut Tape

$0.791

$0.741

$0.691

$0.659

View

Reel

$0.502

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors 1 OHM 20% SMD 0603

PRG18BC1R0MM1RB
Murata Electronics
1: $0.512
356In Stock
4,000Expected 2026-02-18
NRND

Mfr. Part #
PRG18BC1R0MM1RB

Mouser Part #
81-PRG18BC1R0MM1RB

NRND

Murata Electronics

PTC Thermistors 1 OHM 20% SMD 0603

Learn More

Datasheet

356In Stock

4,000Expected 2026-02-18

Cut Tape

$0.512

$0.471

$0.415

$0.395

Reel

$0.305

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors 6.8 OHM 20% SMD 0603

PRG18BC6R8MM1RB
Murata Electronics
1: $0.403
3,934In Stock
8,000Expected 2026-04-29
NRND

Mfr. Part #
PRG18BC6R8MM1RB

Mouser Part #
81-PRG18BC6R8MM1RB

NRND

Murata Electronics

PTC Thermistors 6.8 OHM 20% SMD 0603

Learn More

Datasheet

3,934In Stock

8,000Expected 2026-04-29

Cut Tape

$0.403

$0.391

$0.35

$0.336

Reel

$0.264

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors

PRF15BC102RB6RC
Murata Electronics
1: $0.279
7,781In Stock

Mfr. Part #
PRF15BC102RB6RC

Mouser Part #
81-PRF15BC102RB6RC

Murata Electronics

PTC Thermistors

Learn More

Datasheet

7,781In Stock

Cut Tape

$0.279

$0.248

$0.219

$0.197

Reel

$0.122

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 10,000

PTC Thermistors 470 OHM 50% SMD 0603

PRF18AR471QB5RB
Murata Electronics
1: $0.264
5,170In Stock

Mfr. Part #
PRF18AR471QB5RB

Mouser Part #
81-PRF18AR471QB5RB

Murata Electronics

PTC Thermistors 470 OHM 50% SMD 0603

Learn More

Datasheet

5,170In Stock

Cut Tape

$0.264

$0.233

$0.206

$0.195

Reel

$0.171

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors 470 OHM 50% SMD 0603

PRF18BE471QB5RB
Murata Electronics
1: $0.248
16,056In Stock
8,000Expected 2026-04-14

Mfr. Part #
PRF18BE471QB5RB

Mouser Part #
81-PRF18BE471QB5RB

Murata Electronics

PTC Thermistors 470 OHM 50% SMD 0603

Learn More

Datasheet

16,056In Stock

8,000Expected 2026-04-14

Cut Tape

$0.248

$0.229

$0.202

$0.191

Reel

$0.132

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors 470 OHM 50% SMD 0603

PRF18BF471QB5RB
Murata Electronics
1: $0.248
7,685In Stock
8,000Expected 2026-04-14

Mfr. Part #
PRF18BF471QB5RB

Mouser Part #
81-PRF18BF471QB5RB

Murata Electronics

PTC Thermistors 470 OHM 50% SMD 0603

Learn More

Datasheet

7,685In Stock

8,000Expected 2026-04-14

Cut Tape

$0.248

$0.229

$0.202

$0.191

Reel

$0.144

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors 470 OHM 50% SMD 0603

PRF18BG471QB5RB
Murata Electronics
1: $0.248
2,300In Stock
12,000Expected 2026-04-16

Mfr. Part #
PRF18BG471QB5RB

Mouser Part #
81-PRF18BG471QB5RB

Murata Electronics

PTC Thermistors 470 OHM 50% SMD 0603

Learn More

Datasheet

2,300In Stock

12,000Expected 2026-04-16

Cut Tape

$0.248

$0.229

$0.202

$0.191

Reel

$0.15

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors 470 OHM 50% SMD 0603

PRF18BG471RB5RB
Murata Electronics
1: $0.605
4,077In Stock

Mfr. Part #
PRF18BG471RB5RB

Mouser Part #
81-PRF18BG471RB5RB

Murata Electronics

PTC Thermistors 470 OHM 50% SMD 0603

Learn More

Datasheet

4,077In Stock

$0.605

$0.567

$0.502

$0.477

View

Min.: 1
Mult.: 1

PTC Thermistors 470 OHM 50% SMD 0805

PRF21BA471QB5RA
Murata Electronics
1: $0.543
2,421In Stock
4,000Expected 2026-03-06

Mfr. Part #
PRF21BA471QB5RA

Mouser Part #
81-PRF21BA471QB5RA

Murata Electronics

PTC Thermistors 470 OHM 50% SMD 0805

Learn More

Datasheet

2,421In Stock

4,000Expected 2026-03-06

Cut Tape

$0.543

$0.499

$0.442

$0.42

Reel

$0.326

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors 470 OHM 50% SMD 0805

PRF21BC471QB5RA
Murata Electronics
1: $0.682
3,850In Stock

Mfr. Part #
PRF21BC471QB5RA

Mouser Part #
81-PRF21BC471QB5RA

Murata Electronics

PTC Thermistors 470 OHM 50% SMD 0805

Learn More

Datasheet

3,850In Stock

Cut Tape

$0.682

$0.643

$0.57

$0.539

Reel

$0.293

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors 470 OHM 50% SMD 0805

PRF21BE471QB5RA
Murata Electronics
1: $0.574
3,392In Stock
4,000Expected 2026-04-14

Mfr. Part #
PRF21BE471QB5RA

Mouser Part #
81-PRF21BE471QB5RA

Murata Electronics

PTC Thermistors 470 OHM 50% SMD 0805

Learn More

Datasheet

3,392In Stock

4,000Expected 2026-04-14

Cut Tape

$0.574

$0.541

$0.479

$0.45

Reel

$0.341

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors 100 OHM 20% SMD 0603

PRG18BB101MB1RB
Murata Electronics
1: $0.341
12,320In Stock
8,000Expected 2026-05-01

Mfr. Part #
PRG18BB101MB1RB

Mouser Part #
81-PRG18BB101MB1RB

Murata Electronics

PTC Thermistors 100 OHM 20% SMD 0603

Learn More

Datasheet

12,320In Stock

8,000Expected 2026-05-01

Cut Tape

$0.341

$0.315

$0.276

$0.262

Reel

$0.205

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors 220 OHM 20% SMD 0603

PRG18BB221MB1RB
Murata Electronics
1: $0.326
13,772In Stock
32,000On Order

Mfr. Part #
PRG18BB221MB1RB

Mouser Part #
81-PRG18BB221MB1RB

Murata Electronics

PTC Thermistors 220 OHM 20% SMD 0603

Learn More

Datasheet

13,772In Stock

32,000On Order

Cut Tape

$0.326

$0.305

$0.253

$0.245

Reel

$0.203

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors 33 OHM 20% SMD 0603

PRG18BB330MB1RB
Murata Electronics
1: $0.372
241In Stock
55,700On Order

Mfr. Part #
PRG18BB330MB1RB

Mouser Part #
81-PRG18BB330MB1RB

Murata Electronics

PTC Thermistors 33 OHM 20% SMD 0603

Learn More

Datasheet

241In Stock

55,700On Order

Cut Tape

$0.372

$0.329

$0.288

$0.262

Reel

$0.169

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors 42 OHM 20% SMD 0805

PRG21AR420MB1RA
Murata Electronics
1: $0.667
4,130In Stock

Mfr. Part #
PRG21AR420MB1RA

Mouser Part #
81-PRG21AR420MB1RA

Murata Electronics

PTC Thermistors 42 OHM 20% SMD 0805

Learn More

Datasheet

4,130In Stock

Cut Tape

$0.667

$0.626

$0.589

$0.564

View

Reel

$0.454

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors 0.2 OHM 20% SMD 0805

PRG21BC0R2MM1RA
Murata Electronics
1: $0.946
2,491In Stock
4,000Expected 2026-04-13

Mfr. Part #
PRG21BC0R2MM1RA

Mouser Part #
81-PRG21BC0R2MM1RA

Murata Electronics

PTC Thermistors 0.2 OHM 20% SMD 0805

Learn More

Datasheet

2,491In Stock

4,000Expected 2026-04-13

Cut Tape

$0.946

$0.888

$0.831

$0.791

View

Reel

$0.504

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC Thermistors 0.6 OHM 20% SMD 0805

PRG21BC0R6MM1RA
Murata Electronics
1: $0.76
475In Stock
4,000Expected 2026-03-12

Mfr. Part #
PRG21BC0R6MM1RA

Mouser Part #
81-PRG21BC0R6MM1RA

Murata Electronics

PTC Thermistors 0.6 OHM 20% SMD 0805

Learn More

Datasheet

475In Stock

4,000Expected 2026-03-12

Cut Tape

$0.76

$0.71

$0.668

$0.645

View

Reel

$0.521

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

POSISTOR® PTC Thermistors

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POSISTOR® PTC Thermistors

All Results (64)

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