.hide-partial { max-height: none; } .show-more { display: none; }

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.

All Results (65)

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

Select a category below to see filtering options and narrow down your search.

Part #

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

PRG18BB330MS1RB
Murata Electronics
1: $0.36
10,695In 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

10,695In Stock

Cut Tape

$0.36

$0.33

$0.311

$0.302

View

Reel

$0.235

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRG21AR220MS5RA
Murata Electronics
1: $0.99
2,564In Stock

Mfr. Part No.
PRG21AR220MS5RA

Mouser Part No
81-PRG21AR220MS5RA

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

2,564In Stock

Cut Tape

$0.99

$0.752

$0.648

$0.626

View

Reel

$0.346

Min.: 1
Mult.: 1

: 4,000

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

PRF18BC471RB5RB
Murata Electronics
1: $0.41
3,845In 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

3,845In Stock

Cut Tape

$0.41

$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

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

$0.192

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRF18BB471QB5RB
Murata Electronics
1: $0.33
5,546In Stock

Mfr. Part No.
PRF18BB471QB5RB

Mouser Part No
81-PRF18BB471QB5RB

Murata Electronics

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

Learn More

Datasheet

5,546In Stock

Cut Tape

$0.33

$0.31

$0.274

$0.26

Reel

$0.176

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRF21BC471QB5RA
Murata Electronics
1: $0.45
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

$0.45

$0.422

$0.374

$0.355

Reel

$0.177

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRF18BG471RB5RB
Murata Electronics
1: $0.41
4,057In 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

4,057In Stock

$0.41

$0.381

$0.337

$0.318

View

Min.: 1
Mult.: 1

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

PRF03BB102QB7RL
Murata Electronics
1: $0.13
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

$0.13

$0.119

Reel

$0.119

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

$0.082

View

Reel

$0.053

Min.: 1
Mult.: 1

: 15,000

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

PRG18BC4R7MM1RB
Murata Electronics
1: $0.32
12,730In 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

Learn More

Datasheet

12,730In Stock

Cut Tape

$0.32

$0.302

$0.266

$0.253

Reel

$0.193

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors 1 OHM 20% SMD 0603

PRG18BC1R0MM1RB
Murata Electronics
1: $0.34
3,073In Stock
NRND

Mfr. Part No.
PRG18BC1R0MM1RB

Mouser Part No
81-PRG18BC1R0MM1RB

NRND

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 1 OHM 20% SMD 0603

Learn More

Datasheet

3,073In Stock

Cut Tape

$0.34

$0.316

$0.279

$0.266

Reel

$0.197

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors 2.2 OHM 20% SMD 0603

PRG18BC2R2MM1RB
Murata Electronics
1: $0.32
Non-Stocked Lead-Time 12 Weeks
NRND

Mfr. Part No.
PRG18BC2R2MM1RB

Mouser Part No
81-PRG18BC2R2MM1RB

NRND

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 2.2 OHM 20% SMD 0603

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Cut Tape

$0.32

$0.301

$0.266

$0.253

Reel

$0.188

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRF18BE471QB5RB
Murata Electronics
1: $0.17
23,376In 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

23,376In Stock

Cut Tape

$0.17

$0.154

$0.135

$0.128

Reel

$0.093

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors 220 OHM 20% SMD 0603

PRG18BB221MB1RB
Murata Electronics
1: $0.22
37,810In Stock

Mfr. Part No.
PRG18BB221MB1RB

Mouser Part No
81-PRG18BB221MB1RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 220 OHM 20% SMD 0603

Learn More

Datasheet

37,810In Stock

Cut Tape

$0.22

$0.206

$0.181

$0.172

Reel

$0.13

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
19,853In Stock
164,000On Order

Mfr. Part No.
PRG18BB330MB1RB

Mouser Part No
81-PRG18BB330MB1RB

Murata Electronics

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

Learn More

Datasheet

19,853In Stock

164,000On Order

Cut Tape

$0.22

$0.206

$0.181

$0.172

Reel

$0.117

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRG18BB470MB1RB
Murata Electronics
1: $0.33
13,580In Stock
88,000On Order

Mfr. Part No.
PRG18BB470MB1RB

Mouser Part No
81-PRG18BB470MB1RB

Murata Electronics

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

Learn More

Datasheet

13,580In Stock

88,000On Order

Cut Tape

$0.33

$0.309

$0.273

$0.248

Reel

$0.189

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRG21AR220MS1RK
Murata Electronics
1: $0.43
7,279In 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

7,279In Stock

Cut Tape

$0.43

$0.399

$0.372

$0.353

View

Reel

$0.26

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

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

PRG21BB150MB1RK
Murata Electronics
1: $0.47
11,106In 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

11,106In Stock

Cut Tape

$0.47

$0.443

$0.409

$0.389

View

Reel

$0.29

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

PTC (Positive Temperature Coefficient) Thermistors 1 OHM 20% SMD 0805

PRG21BC1R0MM1RA
Murata Electronics
1: $0.51
5,999In Stock

Mfr. Part No.
PRG21BC1R0MM1RA

Mouser Part No
81-PRG21BC1R0MM1RA

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 1 OHM 20% SMD 0805

Learn More

Datasheet

5,999In Stock

Cut Tape

$0.51

$0.479

$0.447

$0.425

View

Reel

$0.31

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRG21BC4R7MM1RA
Murata Electronics
1: $0.50
6,076In Stock

Mfr. Part No.
PRG21BC4R7MM1RA

Mouser Part No
81-PRG21BC4R7MM1RA

Murata Electronics

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

Learn More

Datasheet

6,076In Stock

Cut Tape

$0.50

$0.47

$0.438

$0.417

View

Reel

$0.303

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors 6.8 OHM 20% SMD 0805

PRG21BC6R8MM1RA
Murata Electronics
1: $0.49
16,713In Stock
12,000Expected 12/05/2026

Mfr. Part No.
PRG21BC6R8MM1RA

Mouser Part No
81-PRG21BC6R8MM1RA

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 6.8 OHM 20% SMD 0805

Learn More

Datasheet

16,713In Stock

12,000Expected 12/05/2026

Cut Tape

$0.49

$0.434

$0.428

$0.407

View

Reel

$0.287

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

Aluminium Organic Polymer Capacitors

ECASD40E337M006KA0
Murata Electronics
1: $1.88
419In Stock
3,000Expected 22/07/2026

Mfr. Part No.
ECASD40E337M006KA0

Mouser Part No
81-ECASD40E337M006KA

Murata Electronics

Aluminium Organic Polymer Capacitors

Learn More

Datasheet

419In Stock

3,000Expected 22/07/2026

Cut Tape

$1.88

$1.23

$0.962

$0.876

Reel

$0.594

View

Min.: 1
Mult.: 1

: 3,000

PTC (Positive Temperature Coefficient) Thermistors

PRF18AS471QB5RB
Murata Electronics
1: $0.20
2,710In Stock

Mfr. Part No.
PRF18AS471QB5RB

Mouser Part No
81-PRF18AS471QB5RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

2,710In Stock

Cut Tape

$0.20

$0.181

$0.159

$0.15

Reel

$0.105

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRF18BB471RB5RB
Murata Electronics
1: $0.22
3,034In Stock

Mfr. Part No.
PRF18BB471RB5RB

Mouser Part No
81-PRF18BB471RB5RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

3,034In Stock

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

PRF21BD471QB5RA
Murata Electronics
1: $0.44
1,200In Stock

Mfr. Part No.
PRF21BD471QB5RA

Mouser Part No
81-PRF21BD471QB5RA

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

1,200In Stock

Cut Tape

$0.44

$0.373

$0.326

$0.287

Reel

$0.19

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

POSISTOR® PTC Thermistors

All Results (65)

Customer Service Office

Company

Resources

Support

POSISTOR® PTC Thermistors

All Results (65)

Circuit Protection

Passive Components