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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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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (EUR) Filter the results in the table by unit price based on your quantity.	Qty.
PTC (Positive Temperature Coefficient) Thermistors 6.8 OHM 20% SMD 0805 PRG21BC6R8MM1RA Murata Electronics 1: €0.43 18,755In Stock 16,000Expected 23/11/2026	Mfr. Part No. PRG21BC6R8MM1RA Mouser Part No 81-PRG21BC6R8MM1RA	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 6.8 OHM 20% SMD 0805 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	18,755In Stock 16,000Expected 23/11/2026	Cut Tape €0.43 €0.403 €0.376 €0.358 View Reel €0.241 €0.341 €0.307 €0.289 €0.241 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 1 OHM 20% SMD 0603 PRG18BC1R0MM1RB Murata Electronics 1: €0.344 1,790In 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 about Murata Electronics murata prg ptc thermistors	Datasheet	1,790In Stock	Cut Tape €0.344 €0.31 €0.258 €0.214 Reel €0.169 View €0.198 €0.177 €0.162 €0.152 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 6.8 OHM 20% SMD 0603 PRG18BC6R8MM1RB Murata Electronics 1: €0.353 12,000In Stock NRND	Mfr. Part No. PRG18BC6R8MM1RB Mouser Part No 81-PRG18BC6R8MM1RB NRND	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 6.8 OHM 20% SMD 0603 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	12,000In Stock	Cut Tape €0.353 €0.296 €0.27 €0.224 Reel €0.144 View €0.203 €0.157 €0.13 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors PRF15BC102RB6RC Murata Electronics 1: €0.155 2,269In Stock 10,000Expected 12/11/2026	Mfr. Part No. PRF15BC102RB6RC Mouser Part No 81-PRF15BC102RB6RC	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	2,269In Stock 10,000Expected 12/11/2026	Cut Tape €0.155 €0.137 €0.12 €0.104 Reel €0.061 View €0.091 €0.087 €0.077 €0.06 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
PTC (Positive Temperature Coefficient) Thermistors PRF18AS471QB5RB Murata Electronics 1: €0.172 2,680In Stock	Mfr. Part No. PRF18AS471QB5RB Mouser Part No 81-PRF18AS471QB5RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	2,680In Stock	Cut Tape €0.172 €0.156 €0.137 €0.129 Reel €0.093 View €0.114 €0.099 €0.089 €0.088 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 PRF18BC471RB5RB Murata Electronics 1: €0.353 3,481In Stock	Mfr. Part No. PRF18BC471RB5RB Mouser Part No 81-PRF18BC471RB5RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	3,481In Stock	Cut Tape €0.353 €0.328 €0.29 €0.276 Reel €0.206 View €0.248 €0.215 €0.192 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 PRF18BE471QB5RB Murata Electronics 1: €0.146 17,230In Stock	Mfr. Part No. PRF18BE471QB5RB Mouser Part No 81-PRF18BE471QB5RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	17,230In Stock	Cut Tape €0.146 €0.132 €0.116 €0.11 View Reel €0.073 €0.095 €0.078 €0.073 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 PRF18BF471QB5RB Murata Electronics 1: €0.172 4,383In Stock 4,000Expected 29/10/2026	Mfr. Part No. PRF18BF471QB5RB Mouser Part No 81-PRF18BF471QB5RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	4,383In Stock 4,000Expected 29/10/2026	Cut Tape €0.172 €0.16 €0.141 €0.114 View Reel €0.076 €0.101 €0.091 €0.076 MouseReel Available	Min.: 1 Mult.: 1 Max.: 4,000 : 4,000
PTC (Positive Temperature Coefficient) Thermistors PRF18BF471RB5RB Murata Electronics 1: €0.353 3,192In Stock	Mfr. Part No. PRF18BF471RB5RB Mouser Part No 81-PRF18BF471RB5RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	3,192In Stock	Cut Tape €0.353 €0.328 €0.29 €0.276 View Reel €0.199 €0.248 €0.215 €0.199 MouseReel Available	Min.: 1 Mult.: 1 Max.: 4,000 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0805 PRF21BA471QB5RA Murata Electronics 1: €0.301 1,271In Stock 4,000Expected 15/12/2026	Mfr. Part No. PRF21BA471QB5RA Mouser Part No 81-PRF21BA471QB5RA	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0805 Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	1,271In Stock 4,000Expected 15/12/2026	Cut Tape €0.301 €0.283 €0.249 €0.237 Reel €0.166 View €0.212 €0.177 €0.165 €0.157 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors PRF21BD471QB5RA Murata Electronics 1: €0.387 318In Stock	Mfr. Part No. PRF21BD471QB5RA Mouser Part No 81-PRF21BD471QB5RA	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	318In Stock	Cut Tape €0.387 €0.346 €0.302 €0.267 Reel €0.172 View €0.237 €0.184 €0.166 €0.163 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 100 OHM 20% SMD 0603 PRG18BB101MS1RB Murata Electronics 1: €0.43 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 about Murata Electronics murata prg ptc thermistors	Datasheet	2,638In Stock	Cut Tape €0.43 €0.396 €0.379 €0.329 View Reel €0.208 €0.30 €0.273 €0.252 €0.242 €0.208 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 33 OHM 20% SMD 0603 PRG18BB330MS1RB Murata Electronics 1: €0.43 1,345In Stock 4,000Expected 04/12/2026	Mfr. Part No. PRG18BB330MS1RB Mouser Part No 81-PRG18BB330MS1RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 33 OHM 20% SMD 0603 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	1,345In Stock 4,000Expected 04/12/2026	Cut Tape €0.43 €0.396 €0.376 €0.329 View Reel €0.22 €0.30 €0.273 €0.252 €0.232 €0.22 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 20% SMD 0603 PRG18BB471MB1RB Murata Electronics 1: €0.215 11,868In Stock 52,000On Order	Mfr. Part No. PRG18BB471MB1RB Mouser Part No 81-PRG18BB471MB1RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 470 OHM 20% SMD 0603 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	11,868In Stock 52,000On Order On Order Ship Dates Mfr. No: PRG18BB471MB1RB Stock: 11,868 Can Dispatch Immediately On Order: 28,000 Expected 01/10/2026 24,000 Expected 16/11/2026 Factory Lead Time: 12 Weeks	Cut Tape €0.215 €0.198 €0.164 €0.137 Reel €0.093 View €0.131 €0.102 €0.084 €0.081 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 22 OHM 20% SMD 0805 PRG21AR220MS1RK Murata Electronics 1: €0.516 2,632In Stock 12,000Expected 11/12/2026	Mfr. Part No. PRG21AR220MS1RK Mouser Part No 81-PRG21AR220MS1RK	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 22 OHM 20% SMD 0805 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	2,632In Stock 12,000Expected 11/12/2026	Cut Tape €0.516 €0.424 €0.405 €0.353 View Reel €0.234 €0.31 €0.30 €0.261 €0.242 €0.234 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
PTC (Positive Temperature Coefficient) Thermistors 42 OHM 20% SMD 0805 PRG21AR420MS1RA Murata Electronics 1: €0.43 1,142In Stock	Mfr. Part No. PRG21AR420MS1RA Mouser Part No 81-PRG21AR420MS1RA	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 42 OHM 20% SMD 0805 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	1,142In Stock	Cut Tape €0.43 €0.396 €0.379 €0.329 View Reel €0.209 €0.30 €0.273 €0.252 €0.232 €0.209 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 0.6 OHM 20% SMD 0805 PRG21BC0R6MM1RA Murata Electronics 1: €0.559 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 about Murata Electronics murata prg ptc thermistors	Datasheet	3,870In Stock	Cut Tape €0.559 €0.516 €0.501 €0.428 View Reel €0.289 €0.396 €0.355 €0.328 €0.303 €0.289 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 2.2 OHM 20% SMD 0805 PRG21BC2R2MM1RA Murata Electronics 1: €0.516 4,908In Stock 8,000Expected 05/11/2026	Mfr. Part No. PRG21BC2R2MM1RA Mouser Part No 81-PRG21BC2R2MM1RA	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 2.2 OHM 20% SMD 0805 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	4,908In Stock 8,000Expected 05/11/2026	Cut Tape €0.516 €0.47 €0.441 €0.391 View Reel €0.261 €0.361 €0.324 €0.299 €0.276 €0.261 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors PRG21BC3R3MM1RA Murata Electronics 1: €0.542 4,438In Stock	Mfr. Part No. PRG21BC3R3MM1RA Mouser Part No 81-PRG21BC3R3MM1RA	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	4,438In Stock	Cut Tape €0.542 €0.499 €0.482 €0.414 View Reel €0.279 €0.382 €0.343 €0.316 €0.292 €0.279 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors PTC 0402, 10kOhms, 50%, 32VDC PRF15BB103RB6RC Murata Electronics 1: €0.129 19,975In Stock	Mfr. Part No. PRF15BB103RB6RC Mouser Part No 81-PRF15BB103RB6RC	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors PTC 0402, 10kOhms, 50%, 32VDC Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	19,975In Stock	Cut Tape €0.129 €0.116 €0.109 €0.099 Reel €0.065 View €0.088 €0.084 €0.077 €0.056 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
PTC (Positive Temperature Coefficient) Thermistors 1 OHM 50% SMD 0402 PRF15BD102RB6RC Murata Electronics 1: €0.129 9,650In Stock	Mfr. Part No. PRF15BD102RB6RC Mouser Part No 81-PRF15BD102RB6RC	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 1 OHM 50% SMD 0402 Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	9,650In Stock	Cut Tape €0.129 €0.116 €0.101 €0.093 Reel €0.061 View €0.079 €0.076 €0.068 €0.059 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 PRF18AR471QB5RB Murata Electronics 1: €0.189 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 about Murata Electronics murata prf ptc thermistors	Datasheet	132In Stock 16,000On Order On Order Ship Dates Mfr. No: PRF18AR471QB5RB Stock: 132 Can Dispatch Immediately On Order: 8,000 Expected 12/10/2026 8,000 Expected 22/10/2026 Factory Lead Time: 13 Weeks	Cut Tape €0.189 €0.165 €0.148 €0.123 Reel €0.089 View €0.103 €0.099 €0.086 MouseReel Available	Min.: 1 Mult.: 1 Max.: 12,000 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 PRF18BB471QB5RB Murata Electronics 1: €0.31 58In Stock 4,000Expected 18/11/2026	Mfr. Part No. PRF18BB471QB5RB Mouser Part No 81-PRF18BB471QB5RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	58In Stock 4,000Expected 18/11/2026	Cut Tape €0.31 €0.288 €0.255 €0.235 Reel €0.163 View €0.208 €0.181 €0.157 €0.155 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 PRF18BC471QB5RB Murata Electronics 1: €0.172 1,525In Stock 4,000Expected 01/10/2026	Mfr. Part No. PRF18BC471QB5RB Mouser Part No 81-PRF18BC471QB5RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	1,525In Stock 4,000Expected 01/10/2026	Cut Tape €0.172 €0.156 €0.137 €0.129 Reel €0.091 View €0.114 €0.099 €0.086 €0.083 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 PRF18BD471QB5RB Murata Electronics 1: €0.172 6,963In Stock 16,000Expected 26/11/2026	Mfr. Part No. PRF18BD471QB5RB Mouser Part No 81-PRF18BD471QB5RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	6,963In Stock 16,000Expected 26/11/2026	Cut Tape €0.172 €0.156 €0.137 €0.129 View Reel €0.094 €0.114 €0.099 €0.094 MouseReel Available	Min.: 1 Mult.: 1 Max.: 4,000 : 4,000

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