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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 2.2 OHM 20% SMD 0805

PRG21BC2R2MM1RA
Murata Electronics
1: $0.48
3,723In Stock

Mfr. Part No.
PRG21BC2R2MM1RA

Mouser Part No
81-PRG21BC2R2MM1RA

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors 2.2 OHM 20% SMD 0805

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Datasheet

3,723In Stock

Cut Tape

$0.48

$0.452

$0.422

$0.402

View

Reel

$0.298

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

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

PRG21BC4R7MM1RA
Murata Electronics
1: $0.48
3,985In Stock
4,000Expected 18/02/2026

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

3,985In Stock

4,000Expected 18/02/2026

Cut Tape

$0.48

$0.452

$0.422

$0.401

View

Reel

$0.277

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRF15BA102RB6RC
Murata Electronics
1: $0.18
9,889Expected 10/04/2026

Mfr. Part No.
PRF15BA102RB6RC

Mouser Part No
81-PRF15BA102RB6RC

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

9,889Expected 10/04/2026

Cut Tape

$0.18

$0.149

$0.131

$0.105

Reel

$0.065

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 10,000

PTC (Positive Temperature Coefficient) Thermistors

PRF18BE471RB5RB
Murata Electronics
1: $0.39
3,986Expected 26/02/2026

Mfr. Part No.
PRF18BE471RB5RB

Mouser Part No
81-PRF18BE471RB5RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

3,986Expected 26/02/2026

Cut Tape

$0.39

$0.366

$0.324

$0.308

Reel

$0.234

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRF03BB541NB7RL
Murata Electronics
1: $0.18
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
PRF03BB541NB7RL

Mouser Part No
81-PRF03BB541NB7RL

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Cut Tape

$0.18

$0.149

$0.131

$0.105

Reel

$0.069

View

Min.: 1
Mult.: 1

Reel: 4,000

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

PRF21AR471QB5RA
Murata Electronics
1: $0.34
Lead-Time 12 Weeks

Mfr. Part No.
PRF21AR471QB5RA

Mouser Part No
81-PRF21AR471QB5RA

Murata Electronics

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

Learn More

Datasheet

Lead-Time 12 Weeks

Cut Tape

$0.34

$0.318

$0.281

$0.266

Reel

$0.199

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRF21AS471QB5RA
Murata Electronics
4,000: $0.19
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
PRF21AS471QB5RA

Mouser Part No
81-PRF21AS471QB5RA

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

$0.19

$0.186

$0.184

Min.: 4,000
Mult.: 4,000

Reel: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRG18BB221MS1RB
Murata Electronics
4,000: $0.229
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
PRG18BB221MS1RB

Mouser Part No
81-PRG18BB221MS1RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

$0.229

Min.: 4,000
Mult.: 4,000

Reel: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRG18BB470MS1RB
Murata Electronics
4,000: $0.229
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
PRG18BB470MS1RB

Mouser Part No
81-PRG18BB470MS1RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

$0.229

Min.: 4,000
Mult.: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRG18BB471MS1RB
Murata Electronics
4,000: $0.227
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
PRG18BB471MS1RB

Mouser Part No
81-PRG18BB471MS1RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

$0.227

Min.: 4,000
Mult.: 4,000

Reel: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRG21AR220MB1RK
Murata Electronics
1: $0.65
Lead-Time 12 Weeks

Mfr. Part No.
PRG21AR220MB1RK

Mouser Part No
81-PRG21AR220MB1RK

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

Lead-Time 12 Weeks

Cut Tape

$0.65

$0.493

$0.424

$0.41

View

Reel

$0.234

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

PTC (Positive Temperature Coefficient) Thermistors

PRF18BC471MB7RB
Murata Electronics
4,000: $0.222
Non-Stocked

Mfr. Part No.
PRF18BC471MB7RB

Mouser Part No
81-PRF18BC471MB7RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

Non-Stocked

Reel

$0.222

$0.218

Min.: 4,000
Mult.: 4,000

Reel: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRF18BD471MB7RB
Murata Electronics
4,000: $0.222
Non-Stocked

Mfr. Part No.
PRF18BD471MB7RB

Mouser Part No
81-PRF18BD471MB7RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

Non-Stocked

Reel

$0.222

$0.218

Min.: 4,000
Mult.: 4,000

Reel: 4,000

PTC (Positive Temperature Coefficient) Thermistors

PRF18BE471MB7RB
Murata Electronics
4,000: $0.222
Non-Stocked

Mfr. Part No.
PRF18BE471MB7RB

Mouser Part No
81-PRF18BE471MB7RB

Murata Electronics

PTC (Positive Temperature Coefficient) Thermistors

Learn More

Datasheet

Non-Stocked

Reel

$0.222

$0.218

Min.: 4,000
Mult.: 4,000

Reel: 4,000

POSISTOR® PTC Thermistors

All Results (64)

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POSISTOR® PTC Thermistors

All Results (64)

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