Passive Components – Mouser Singapore

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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

PRG21BC3R3MM1RA
Murata Electronics
1: $0.721
5,605In Stock

Mfr. Part No.
PRG21BC3R3MM1RA

Mouser Part No
81-PRG21BC3R3MM1RA

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

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Datasheet

5,605In Stock

Cut Tape

$0.721

$0.676

$0.631

$0.601

View

Reel

$0.441

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRG18BC1R0MM1RB
Murata Electronics
1: $0.462
3,055In Stock
NRND

Mfr. Part No.
PRG18BC1R0MM1RB

Mouser Part No
81-PRG18BC1R0MM1RB

NRND

Murata Electronics

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

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Datasheet

3,055In Stock

Cut Tape

$0.462

$0.43

$0.379

$0.362

Reel

$0.268

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRG18BC2R2MM1RB
Murata Electronics
1: $0.462
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

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Datasheet

Non-Stocked Lead-Time 12 Weeks

Cut Tape

$0.462

$0.426

$0.377

$0.358

Reel

$0.261

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRG21BC6R8MM1RA
Murata Electronics
1: $0.68
19,080In Stock
16,000Expected 8/10/2026

Mfr. Part No.
PRG21BC6R8MM1RA

Mouser Part No
81-PRG21BC6R8MM1RA

Murata Electronics

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

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Datasheet

19,080In Stock

16,000Expected 8/10/2026

Cut Tape

$0.68

$0.638

$0.594

$0.566

View

Reel

$0.381

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRF15BA102RB6RC
Murata Electronics
1: $0.245
9,889In Stock

Mfr. Part No.
PRF15BA102RB6RC

Mouser Part No
81-PRF15BA102RB6RC

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

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Datasheet

9,889In Stock

Cut Tape

$0.245

$0.203

$0.178

$0.143

Reel

$0.088

View

MouseReel Available

Min.: 1
Mult.: 1

: 10,000

PTC (Positive Temperature Coefficient) Thermistors

PRF15BC102RB6RC
Murata Electronics
1: $0.245
12,269In Stock

Mfr. Part No.
PRF15BC102RB6RC

Mouser Part No
81-PRF15BC102RB6RC

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

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Datasheet

12,269In Stock

Cut Tape

$0.245

$0.218

$0.192

$0.165

Reel

$0.097

View

MouseReel Available

Min.: 1
Mult.: 1

: 10,000

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

PRF18AR471QB5RB
Murata Electronics
1: $0.299
132In Stock
16,000On Order

Mfr. Part No.
PRF18AR471QB5RB

Mouser Part No
81-PRF18AR471QB5RB

Murata Electronics

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

Learn More

Datasheet

132In Stock

16,000On Order

Cut Tape

$0.299

$0.261

$0.234

$0.192

Reel

$0.143

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRF18AS471QB5RB
Murata Electronics
1: $0.272
2,690In Stock

Mfr. Part No.
PRF18AS471QB5RB

Mouser Part No
81-PRF18AS471QB5RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

2,690In Stock

Cut Tape

$0.272

$0.246

$0.216

$0.204

Reel

$0.147

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRF18BB471QB5RB
Murata Electronics
1: $0.462
96In Stock
4,000Expected 8/9/2026

Mfr. Part No.
PRF18BB471QB5RB

Mouser Part No
81-PRF18BB471QB5RB

Murata Electronics

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

Learn More

Datasheet

96In Stock

4,000Expected 8/9/2026

Cut Tape

$0.462

$0.43

$0.379

$0.36

Reel

$0.254

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRF18BB471RB5RB
Murata Electronics
1: $0.299
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

$0.299

$0.28

$0.246

$0.234

Reel

$0.16

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRF18BC471QB5RB
Murata Electronics
1: $0.272
5,550In Stock
4,000Expected 22/9/2026

Mfr. Part No.
PRF18BC471QB5RB

Mouser Part No
81-PRF18BC471QB5RB

Murata Electronics

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

Learn More

Datasheet

5,550In Stock

4,000Expected 22/9/2026

Cut Tape

$0.272

$0.246

$0.216

$0.204

Reel

$0.144

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRF18BD471QB5RB
Murata Electronics
1: $0.272
11,973In Stock

Mfr. Part No.
PRF18BD471QB5RB

Mouser Part No
81-PRF18BD471QB5RB

Murata Electronics

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

Learn More

Datasheet

11,973In Stock

Cut Tape

$0.272

$0.246

$0.216

$0.204

Reel

$0.148

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRF18BD471RB5RB
Murata Electronics
1: $0.558
4,451In Stock

Mfr. Part No.
PRF18BD471RB5RB

Mouser Part No
81-PRF18BD471RB5RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

4,451In Stock

Cut Tape

$0.558

$0.518

$0.458

$0.437

Reel

$0.32

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRF18BF471QB5RB
Murata Electronics
1: $0.272
4,948In Stock

Mfr. Part No.
PRF18BF471QB5RB

Mouser Part No
81-PRF18BF471QB5RB

Murata Electronics

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

Learn More

Datasheet

4,948In Stock

Cut Tape

$0.272

$0.253

$0.223

$0.18

Reel

$0.131

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRF18BF471RB5RB
Murata Electronics
1: $0.558
4,132In Stock

Mfr. Part No.
PRF18BF471RB5RB

Mouser Part No
81-PRF18BF471RB5RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

4,132In Stock

Cut Tape

$0.558

$0.518

$0.458

$0.437

Reel

$0.314

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRF18BG471QB5RB
Murata Electronics
1: $0.231
6,493In Stock
56,000On Order

Mfr. Part No.
PRF18BG471QB5RB

Mouser Part No
81-PRF18BG471QB5RB

Murata Electronics

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

Learn More

Datasheet

6,493In Stock

56,000On Order

Cut Tape

$0.231

$0.209

$0.184

$0.174

Reel

$0.129

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRF21BB471QB5RA
Murata Electronics
1: $0.476
1,430In Stock

Mfr. Part No.
PRF21BB471QB5RA

Mouser Part No
81-PRF21BB471QB5RA

Murata Electronics

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

Learn More

Datasheet

1,430In Stock

Cut Tape

$0.476

$0.447

$0.394

$0.375

Reel

$0.256

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRF21BD471QB5RA
Murata Electronics
1: $0.612
1,018In Stock

Mfr. Part No.
PRF21BD471QB5RA

Mouser Part No
81-PRF21BD471QB5RA

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

1,018In Stock

Cut Tape

$0.612

$0.51

$0.449

$0.392

Reel

$0.267

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRG18BB101MS1RB
Murata Electronics
1: $0.585
2,638In Stock

Mfr. Part No.
PRG18BB101MS1RB

Mouser Part No
81-PRG18BB101MS1RB

Murata Electronics

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

Learn More

Datasheet

2,638In Stock

Cut Tape

$0.585

$0.543

$0.506

$0.48

View

Reel

$0.339

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRG18BB221MB1RB
Murata Electronics
1: $0.299
5,739In Stock
56,000Expected 8/10/2026

Mfr. Part No.
PRG18BB221MB1RB

Mouser Part No
81-PRG18BB221MB1RB

Murata Electronics

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

Learn More

Datasheet

5,739In Stock

56,000Expected 8/10/2026

Cut Tape

$0.299

$0.28

$0.246

$0.234

Reel

$0.174

View

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors 42 OHM 20% SMD 0805

PRG21AR420MB1RA
Murata Electronics
1: $0.639
2,096In Stock
4,000Expected 10/8/2026

Mfr. Part No.
PRG21AR420MB1RA

Mouser Part No
81-PRG21AR420MB1RA

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 42 OHM 20% SMD 0805

Learn More

Datasheet

2,096In Stock

4,000Expected 10/8/2026

Cut Tape

$0.639

$0.605

$0.564

$0.537

View

Reel

$0.377

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

PTC (Positive Temperature Coefficient) Thermistors 42 OHM 20% SMD 0805

PRG21AR420MS1RA
Murata Electronics
1: $0.585
1,242In Stock

Mfr. Part No.
PRG21AR420MS1RA

Mouser Part No
81-PRG21AR420MS1RA

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 42 OHM 20% SMD 0805

Learn More

Datasheet

1,242In Stock

Cut Tape

$0.585

$0.543

$0.506

$0.48

View

Reel

$0.333

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRG21BB220MB1RK
Murata Electronics
1: $0.653
912In Stock
12,000On Order

Mfr. Part No.
PRG21BB220MB1RK

Mouser Part No
81-PRG21BB220MB1RK

Murata Electronics

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

Learn More

Datasheet

912In Stock

12,000On Order

Cut Tape

$0.653

$0.608

$0.568

$0.54

View

Reel

$0.394

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

PTC (Positive Temperature Coefficient) Thermistors 0.6 OHM 20% SMD 0805

PRG21BC0R6MM1RA
Murata Electronics
1: $1.16
3,870In Stock

Mfr. Part No.
PRG21BC0R6MM1RA

Mouser Part No
81-PRG21BC0R6MM1RA

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 0.6 OHM 20% SMD 0805

Learn More

Datasheet

3,870In Stock

Cut Tape

$1.16

$0.894

$0.77

$0.743

View

Reel

$0.457

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

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

PRG21BC1R0MM1RA
Murata Electronics
1: $0.694
4,959In 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

4,959In Stock

Cut Tape

$0.694

$0.651

$0.608

$0.578

View

Reel

$0.422

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

POSISTOR® PTC Thermistors

Types of Passive Components

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