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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 (CHF) Filter the results in the table by unit price based on your quantity.	Qty.
PTC (Positive Temperature Coefficient) Thermistors 15 OHM 20% SMD 0805 PRG21BB150MB1RK Murata Electronics 1: CHF 0.459 9’094In Stock	Mfr. Part No. PRG21BB150MB1RK Mouser Part No 81-PRG21BB150MB1RK	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 15 OHM 20% SMD 0805 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	9’094In Stock	Cut Tape CHF 0.459 CHF 0.418 CHF 0.348 CHF 0.336 View Reel CHF 0.209 CHF 0.318 CHF 0.288 CHF 0.273 CHF 0.256 CHF 0.209 MouseReel Available	Min.: 1 Mult.: 1 : 3’000
PTC (Positive Temperature Coefficient) Thermistors 0.2 OHM 20% SMD 0805 PRG21BC0R2MM1RA Murata Electronics 1: CHF 0.604 8’124In Stock	Mfr. Part No. PRG21BC0R2MM1RA Mouser Part No 81-PRG21BC0R2MM1RA	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 0.2 OHM 20% SMD 0805 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	8’124In Stock	Cut Tape CHF 0.604 CHF 0.552 CHF 0.459 CHF 0.44 View Reel CHF 0.252 CHF 0.423 CHF 0.381 CHF 0.36 CHF 0.285 CHF 0.252 MouseReel Available	Min.: 1 Mult.: 1 : 4’000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0805 PRF21BC471QB5RA Murata Electronics 1: CHF 0.371 5’720In Stock	Mfr. Part No. PRF21BC471QB5RA Mouser Part No 81-PRF21BC471QB5RA	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0805 Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	5’720In Stock	Cut Tape CHF 0.371 CHF 0.317 CHF 0.273 CHF 0.225 Reel CHF 0.151 View CHF 0.198 CHF 0.164 CHF 0.15 CHF 0.148 MouseReel Available	Min.: 1 Mult.: 1 : 4’000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0805 PRF21BE471QB5RA Murata Electronics 1: CHF 0.306 6’631In Stock	Mfr. Part No. PRF21BE471QB5RA Mouser Part No 81-PRF21BE471QB5RA	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0805 Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	6’631In Stock	Cut Tape CHF 0.306 CHF 0.286 CHF 0.254 CHF 0.225 Reel CHF 0.154 View CHF 0.198 CHF 0.167 CHF 0.153 CHF 0.15 MouseReel Available	Min.: 1 Mult.: 1 : 4’000
PTC (Positive Temperature Coefficient) Thermistors PRF18BE471RB5RB Murata Electronics 1: CHF 0.33 3’760In Stock	Mfr. Part No. PRF18BE471RB5RB Mouser Part No 81-PRF18BE471RB5RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	3’760In Stock	Cut Tape CHF 0.33 CHF 0.307 CHF 0.271 CHF 0.258 Reel CHF 0.187 View CHF 0.232 CHF 0.194 CHF 0.182 CHF 0.177 MouseReel Available	Min.: 1 Mult.: 1 : 4’000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 PRF18BG471RB5RB Murata Electronics 1: CHF 0.33 4’032In Stock	Mfr. Part No. PRF18BG471RB5RB Mouser Part No 81-PRF18BG471RB5RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	4’032In Stock	CHF 0.33 CHF 0.302 CHF 0.271 CHF 0.236 View CHF 0.211 CHF 0.194 CHF 0.193 CHF 0.176 CHF 0.173	Min.: 1 Mult.: 1
PTC (Positive Temperature Coefficient) Thermistors PRF15BA102RB6RC Murata Electronics 1: CHF 0.145 9’809In Stock	Mfr. Part No. PRF15BA102RB6RC Mouser Part No 81-PRF15BA102RB6RC	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	9’809In Stock	Cut Tape CHF 0.145 CHF 0.12 CHF 0.106 CHF 0.084 View Reel CHF 0.053 CHF 0.074 CHF 0.071 CHF 0.064 CHF 0.053 MouseReel Available	Min.: 1 Mult.: 1 : 10’000
PTC (Positive Temperature Coefficient) Thermistors 0.6 OHM 20% SMD 0805 PRG21BC0R6MM1RA Murata Electronics 1: CHF 0.523 3’820In 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	3’820In Stock	Cut Tape CHF 0.523 CHF 0.483 CHF 0.457 CHF 0.401 View Reel CHF 0.271 CHF 0.371 CHF 0.332 CHF 0.307 CHF 0.284 CHF 0.271 MouseReel Available	Min.: 1 Mult.: 1 : 4’000
PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC PRF03BA102QB7RL Murata Electronics 1: CHF 0.105 12’000In Stock New Product	Mfr. Part No. PRF03BA102QB7RL Mouser Part No 81-PRF03BA102QB7RL New Product	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC Learn More about Murata Electronics murata auto prf ptc thermistors	Datasheet	12’000In Stock	Cut Tape CHF 0.105 CHF 0.089 CHF 0.078 CHF 0.066 View Reel CHF 0.041 CHF 0.057 CHF 0.054 CHF 0.049 CHF 0.047 CHF 0.041	Min.: 1 Mult.: 1 : 15’000
PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC PRF03BA102QS7RL Murata Electronics 1: CHF 0.129 10’400In Stock New Product	Mfr. Part No. PRF03BA102QS7RL Mouser Part No 81-PRF03BA102QS7RL New Product	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC Learn More about Murata Electronics murata auto prf ptc thermistors	Datasheet	10’400In Stock	Cut Tape CHF 0.129 CHF 0.107 CHF 0.095 CHF 0.076 View Reel CHF 0.049 CHF 0.066 CHF 0.064 CHF 0.057 CHF 0.054 CHF 0.049	Min.: 1 Mult.: 1 : 15’000
PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC PRF03BD102QB7RL Murata Electronics 1: CHF 0.105 11’920In Stock New Product	Mfr. Part No. PRF03BD102QB7RL Mouser Part No 81-PRF03BD102QB7RL New Product	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC Learn More about Murata Electronics murata auto prf ptc thermistors	Datasheet	11’920In Stock	Cut Tape CHF 0.105 CHF 0.089 CHF 0.078 CHF 0.066 View Reel CHF 0.041 CHF 0.057 CHF 0.054 CHF 0.049 CHF 0.047 CHF 0.041	Min.: 1 Mult.: 1 : 15’000
PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC PRF03BD102QS7RL Murata Electronics 1: CHF 0.129 11’968In Stock New Product	Mfr. Part No. PRF03BD102QS7RL Mouser Part No 81-PRF03BD102QS7RL New Product	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC Learn More about Murata Electronics murata auto prf ptc thermistors	Datasheet	11’968In Stock	Cut Tape CHF 0.129 CHF 0.107 CHF 0.095 CHF 0.076 View Reel CHF 0.049 CHF 0.066 CHF 0.064 CHF 0.057 CHF 0.054 CHF 0.049	Min.: 1 Mult.: 1 : 15’000
PTC (Positive Temperature Coefficient) Thermistors 0.6x0.3mm 1kohm 115+/-5degC PRF03BB102QB7RL Murata Electronics 1: CHF 0.089 13’539In 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 about Murata Electronics murata prf ptc thermistors	Datasheet	13’539In Stock	Cut Tape CHF 0.089 CHF 0.08 CHF 0.069 CHF 0.066 View Reel CHF 0.043 CHF 0.058 CHF 0.054 CHF 0.049 CHF 0.045 CHF 0.043	Min.: 1 Mult.: 1 : 15’000
PTC (Positive Temperature Coefficient) Thermistors 0.6x0.3mm 1kohm 105+/-5degC PRF03BC102QB7RL Murata Electronics 1: CHF 0.089 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 about Murata Electronics murata prf ptc thermistors	Datasheet	14’465In Stock	Cut Tape CHF 0.089 CHF 0.08 CHF 0.069 CHF 0.066 View Reel CHF 0.043 CHF 0.058 CHF 0.054 CHF 0.049 CHF 0.045 CHF 0.043	Min.: 1 Mult.: 1 : 15’000
PTC (Positive Temperature Coefficient) Thermistors PRF15BB102RB6RC Murata Electronics 1: CHF 0.121 56’774In Stock	Mfr. Part No. PRF15BB102RB6RC Mouser Part No 81-PRF15BB102RB6RC	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	56’774In Stock	Cut Tape CHF 0.121 CHF 0.109 CHF 0.095 CHF 0.087 Reel CHF 0.061 View CHF 0.074 CHF 0.071 CHF 0.064 CHF 0.058 MouseReel Available	Min.: 1 Mult.: 1 : 10’000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 PRF18BA471QB5RB Murata Electronics 1: CHF 0.161 64’029In Stock	Mfr. Part No. PRF18BA471QB5RB Mouser Part No 81-PRF18BA471QB5RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	64’029In Stock	Cut Tape CHF 0.161 CHF 0.146 CHF 0.137 CHF 0.127 View Reel CHF 0.091 CHF 0.111 CHF 0.10 CHF 0.091 MouseReel Available	Min.: 1 Mult.: 1 Max.: 4’000 : 4’000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 PRF18BG471QB5RB Murata Electronics 1: CHF 0.137 50’053In Stock 32’000Expected 12/31/2026	Mfr. Part No. PRF18BG471QB5RB Mouser Part No 81-PRF18BG471QB5RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	50’053In Stock 32’000Expected 12/31/2026	Cut Tape CHF 0.137 CHF 0.124 CHF 0.109 CHF 0.103 Reel CHF 0.075 View CHF 0.09 CHF 0.078 CHF 0.071 CHF 0.069 MouseReel Available	Min.: 1 Mult.: 1 : 4’000
PTC (Positive Temperature Coefficient) Thermistors 100 OHM 20% SMD 0603 PRG18BB101MB1RB Murata Electronics 1: CHF 0.21 37’151In Stock 32’000Expected 12/3/2026	Mfr. Part No. PRG18BB101MB1RB Mouser Part No 81-PRG18BB101MB1RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 100 OHM 20% SMD 0603 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	37’151In Stock 32’000Expected 12/3/2026	Cut Tape CHF 0.21 CHF 0.188 CHF 0.156 CHF 0.13 Reel CHF 0.084 View CHF 0.123 CHF 0.092 CHF 0.076 CHF 0.074 MouseReel Available	Min.: 1 Mult.: 1 : 4’000
PTC (Positive Temperature Coefficient) Thermistors 220 OHM 20% SMD 0603 PRG18BB221MB1RB Murata Electronics 1: CHF 0.226 26’229In Stock 96’000On Order	Mfr. Part No. PRG18BB221MB1RB Mouser Part No 81-PRG18BB221MB1RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 220 OHM 20% SMD 0603 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	26’229In Stock 96’000On Order On Order Ship Dates Mfr. No: PRG18BB221MB1RB Stock: 26’229 Can Dispatch Immediately On Order: 36’000 Expected 12/3/2026 60’000 Expected 12/24/2026 Factory Lead Time: 12 Weeks	Cut Tape CHF 0.226 CHF 0.198 CHF 0.16 CHF 0.148 Reel CHF 0.099 View CHF 0.123 CHF 0.108 CHF 0.089 CHF 0.084 MouseReel Available	Min.: 1 Mult.: 1 : 4’000
PTC (Positive Temperature Coefficient) Thermistors 33 OHM 20% SMD 0603 PRG18BB330MB1RB Murata Electronics 1: CHF 0.201 142’834In Stock	Mfr. Part No. PRG18BB330MB1RB Mouser Part No 81-PRG18BB330MB1RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 33 OHM 20% SMD 0603 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	142’834In Stock	Cut Tape CHF 0.201 CHF 0.185 CHF 0.154 CHF 0.128 Reel CHF 0.082 View CHF 0.122 CHF 0.09 CHF 0.074 CHF 0.073 MouseReel Available	Min.: 1 Mult.: 1 : 4’000
PTC (Positive Temperature Coefficient) Thermistors 0603 47ohm 20% SMD PRG18BB470MB1RB Murata Electronics 1: CHF 0.298 53’406In Stock 44’000Expected 11/26/2026	Mfr. Part No. PRG18BB470MB1RB Mouser Part No 81-PRG18BB470MB1RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 0603 47ohm 20% SMD Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	53’406In Stock 44’000Expected 11/26/2026	Cut Tape CHF 0.298 CHF 0.264 CHF 0.222 CHF 0.183 Reel CHF 0.128 View CHF 0.173 CHF 0.152 CHF 0.117 MouseReel Available	Min.: 1 Mult.: 1 : 4’000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 20% SMD 0603 PRG18BB471MB1RB Murata Electronics 1: CHF 0.201 37’698In Stock 24’000Expected 11/20/2026	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	37’698In Stock 24’000Expected 11/20/2026	Cut Tape CHF 0.201 CHF 0.185 CHF 0.154 CHF 0.128 Reel CHF 0.087 View CHF 0.123 CHF 0.095 CHF 0.078 CHF 0.075 MouseReel Available	Min.: 1 Mult.: 1 : 4’000
PTC (Positive Temperature Coefficient) Thermistors 22 OHM 20% SMD 0805 PRG21BB220MB1RK Murata Electronics 1: CHF 0.451 6’000In Stock 15’000On Order	Mfr. Part No. PRG21BB220MB1RK Mouser Part No 81-PRG21BB220MB1RK	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 22 OHM 20% SMD 0805 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	6’000In Stock 15’000On Order On Order Ship Dates Mfr. No: PRG21BB220MB1RK Stock: 6’000 Can Dispatch Immediately On Order: 6’000 Expected 12/8/2026 9’000 Expected 12/11/2026 Factory Lead Time: 12 Weeks	Cut Tape CHF 0.451 CHF 0.417 CHF 0.399 CHF 0.345 View Reel CHF 0.208 CHF 0.318 CHF 0.286 CHF 0.264 CHF 0.244 CHF 0.208 MouseReel Available	Min.: 1 Mult.: 1 : 3’000
PTC (Positive Temperature Coefficient) Thermistors 4.7 OHM 20% SMD 0805 PRG21BC4R7MM1RA Murata Electronics 1: CHF 0.402 8’226In 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 about Murata Electronics murata prg ptc thermistors	Datasheet	8’226In Stock	Cut Tape CHF 0.402 CHF 0.378 CHF 0.353 CHF 0.336 View Reel CHF 0.244 CHF 0.319 CHF 0.288 CHF 0.271 CHF 0.244 MouseReel Available	Min.: 1 Mult.: 1 : 4’000
PTC (Positive Temperature Coefficient) Thermistors 2.2 OHM 20% SMD 0603 PRG18BC2R2MM1RB Murata Electronics 1: CHF 0.33 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 about Murata Electronics murata prg ptc thermistors	Datasheet	Non-Stocked Lead-Time 12 Weeks	Cut Tape CHF 0.33 CHF 0.30 CHF 0.235 CHF 0.21 Reel CHF 0.135 View CHF 0.191 CHF 0.148 CHF 0.122 CHF 0.121 MouseReel Available	Min.: 1 Mult.: 1 : 4’000

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