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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 (GBP) Filter the results in the table by unit price based on your quantity.	Qty.
PTC (Positive Temperature Coefficient) Thermistors 0.2 OHM 20% SMD 0805 PRG21BC0R2MM1RA Murata Electronics 1: £0.563 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 £0.563 £0.515 £0.428 £0.41 View Reel £0.235 £0.395 £0.355 £0.336 £0.266 £0.235 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 PRF18BA471QB5RB Murata Electronics 1: £0.113 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 £0.113 £0.101 £0.093 £0.09 View Reel £0.074 £0.083 £0.08 £0.074 MouseReel Available	Min.: 1 Mult.: 1 Max.: 4,000 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 15 OHM 20% SMD 0805 PRG21BB150MB1RK Murata Electronics 1: £0.428 9,044In 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	9,044In Stock	Cut Tape £0.428 £0.39 £0.325 £0.313 View Reel £0.195 £0.297 £0.269 £0.255 £0.239 £0.195 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
PTC (Positive Temperature Coefficient) Thermistors 6.8 OHM 20% SMD 0603 PRG18BC6R8MM1RB Murata Electronics 1: £0.308 11,889In 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	11,889In Stock	Cut Tape £0.308 £0.258 £0.236 £0.196 Reel £0.126 View £0.177 £0.137 £0.113 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors PRF15BA102RB6RC Murata Electronics 1: £0.135 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 £0.135 £0.112 £0.099 £0.079 View Reel £0.05 £0.069 £0.066 £0.059 £0.05 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 PRF18BG471RB5RB Murata Electronics 1: £0.308 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	£0.308 £0.258 £0.237 £0.21 View £0.19 £0.175 £0.165 £0.161 £0.159	Min.: 1 Mult.: 1
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0805 PRF21BE471QB5RA Murata Electronics 1: £0.285 6,486In 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	6,486In Stock	Cut Tape £0.285 £0.267 £0.237 £0.21 Reel £0.139 View £0.185 £0.155 £0.138 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 0.6 OHM 20% SMD 0805 PRG21BC0R6MM1RA Murata Electronics 1: £0.488 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 £0.488 £0.45 £0.426 £0.374 View Reel £0.252 £0.346 £0.31 £0.286 £0.265 £0.252 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors PRF18BE471RB5RB Murata Electronics 1: £0.308 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 £0.308 £0.286 £0.253 £0.241 Reel £0.175 View £0.217 £0.181 £0.164 £0.162 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC PRF03BA102QB7RL Murata Electronics 1: £0.098 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 £0.098 £0.083 £0.072 £0.061 View Reel £0.038 £0.053 £0.051 £0.045 £0.044 £0.038	Min.: 1 Mult.: 1 : 15,000
PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC PRF03BA102QS7RL Murata Electronics 1: £0.12 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 £0.12 £0.10 £0.088 £0.071 View Reel £0.045 £0.062 £0.059 £0.053 £0.051 £0.045	Min.: 1 Mult.: 1 : 15,000
PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC PRF03BD102QB7RL Murata Electronics 1: £0.098 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 £0.098 £0.083 £0.072 £0.061 View Reel £0.038 £0.053 £0.051 £0.045 £0.044 £0.038	Min.: 1 Mult.: 1 : 15,000
PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC PRF03BD102QS7RL Murata Electronics 1: £0.12 11,818In 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	11,818In Stock	Cut Tape £0.12 £0.10 £0.088 £0.071 View Reel £0.045 £0.062 £0.059 £0.053 £0.051 £0.045	Min.: 1 Mult.: 1 : 15,000
PTC (Positive Temperature Coefficient) Thermistors 0.6x0.3mm 1kohm 115+/-5degC PRF03BB102QB7RL Murata Electronics 1: £0.083 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 £0.083 £0.074 £0.065 £0.062 View Reel £0.04 £0.054 £0.051 £0.045 £0.042 £0.04	Min.: 1 Mult.: 1 : 15,000
PTC (Positive Temperature Coefficient) Thermistors 0.6x0.3mm 1kohm 105+/-5degC PRF03BC102QB7RL Murata Electronics 1: £0.083 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 £0.083 £0.074 £0.065 £0.062 View Reel £0.04 £0.054 £0.051 £0.045 £0.042 £0.04	Min.: 1 Mult.: 1 : 15,000
PTC (Positive Temperature Coefficient) Thermistors PRF15BB102RB6RC Murata Electronics 1: £0.113 46,274In 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	46,274In Stock	Cut Tape £0.113 £0.101 £0.088 £0.081 Reel £0.057 View £0.069 £0.066 £0.059 £0.054 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 PRF18BG471QB5RB Murata Electronics 1: £0.127 50,048In Stock 32,000Expected 31/12/2026	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	50,048In Stock 32,000Expected 31/12/2026	Cut Tape £0.127 £0.115 £0.101 £0.096 Reel £0.07 View £0.084 £0.072 £0.066 £0.065 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 100 OHM 20% SMD 0603 PRG18BB101MB1RB Murata Electronics 1: £0.196 35,313In Stock 32,000Expected 03/12/2026	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	35,313In Stock 32,000Expected 03/12/2026	Cut Tape £0.196 £0.173 £0.144 £0.121 Reel £0.081 View £0.114 £0.094 £0.071 £0.07 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 220 OHM 20% SMD 0603 PRG18BB221MB1RB Murata Electronics 1: £0.21 24,679In 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	24,679In Stock 96,000On Order On Order Ship Dates Mfr. No: PRG18BB221MB1RB Stock: 24,679 Can Dispatch Immediately On Order: 36,000 Expected 03/12/2026 60,000 Expected 24/12/2026 Factory Lead Time: 12 Weeks	Cut Tape £0.21 £0.185 £0.149 £0.138 Reel £0.093 View £0.114 £0.10 £0.083 £0.079 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 33 OHM 20% SMD 0603 PRG18BB330MB1RB Murata Electronics 1: £0.188 142,163In 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	142,163In Stock	Cut Tape £0.188 £0.173 £0.143 £0.12 Reel £0.077 View £0.113 £0.084 £0.069 £0.068 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 0603 47ohm 20% SMD PRG18BB470MB1RB Murata Electronics 1: £0.271 52,311In Stock 44,000Expected 26/11/2026	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	52,311In Stock 44,000Expected 26/11/2026	Cut Tape £0.271 £0.242 £0.203 £0.168 Reel £0.12 View £0.16 £0.148 £0.109 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 20% SMD 0603 PRG18BB471MB1RB Murata Electronics 1: £0.188 37,251In Stock 24,000Expected 20/11/2026	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	37,251In Stock 24,000Expected 20/11/2026	Cut Tape £0.188 £0.173 £0.143 £0.12 Reel £0.083 View £0.114 £0.099 £0.072 £0.071 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 22 OHM 20% SMD 0805 PRG21BB220MB1RK Murata Electronics 1: £0.45 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 08/12/2026 9,000 Expected 11/12/2026 Factory Lead Time: 12 Weeks	Cut Tape £0.45 £0.411 £0.372 £0.341 View Reel £0.206 £0.305 £0.283 £0.258 £0.239 £0.206 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
PTC (Positive Temperature Coefficient) Thermistors 4.7 OHM 20% SMD 0805 PRG21BC4R7MM1RA Murata Electronics 1: £0.375 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 £0.375 £0.353 £0.329 £0.313 View Reel £0.228 £0.298 £0.269 £0.253 £0.228 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 2.2 OHM 20% SMD 0603 PRG18BC2R2MM1RB Murata Electronics 1: £0.308 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 £0.308 £0.28 £0.219 £0.196 Reel £0.126 View £0.178 £0.138 £0.113 MouseReel Available	Min.: 1 Mult.: 1 : 4,000

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POSISTOR® PTC Thermistors

Types of Passive Components