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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 (CAD) Filter the results in the table by unit price based on your quantity.	Qty.
PTC Thermistors 15 OHM 20% SMD 0805 PRG21BB150MB1RK Murata Electronics 1: $0.821 9,754In Stock	Mfr. Part # PRG21BB150MB1RK Mouser Part # 81-PRG21BB150MB1RK	Murata Electronics	PTC Thermistors 15 OHM 20% SMD 0805 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	9,754In Stock	Cut Tape $0.821 $0.749 $0.622 $0.602 View Reel $0.373 $0.569 $0.516 $0.49 $0.459 $0.373 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
PTC Thermistors 0.2 OHM 20% SMD 0805 PRG21BC0R2MM1RA Murata Electronics 1: $1.08 8,126In Stock	Mfr. Part # PRG21BC0R2MM1RA Mouser Part # 81-PRG21BC0R2MM1RA	Murata Electronics	PTC Thermistors 0.2 OHM 20% SMD 0805 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	8,126In Stock	Cut Tape $1.08 $0.988 $0.821 $0.786 View Reel $0.451 $0.757 $0.681 $0.645 $0.511 $0.451 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC Thermistors 470 OHM 50% SMD 0805 PRF21BC471QB5RA Murata Electronics 1: $0.662 6,120In Stock	Mfr. Part # PRF21BC471QB5RA Mouser Part # 81-PRF21BC471QB5RA	Murata Electronics	PTC Thermistors 470 OHM 50% SMD 0805 Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	6,120In Stock	Cut Tape $0.662 $0.567 $0.49 $0.402 Reel $0.268 View $0.354 $0.292 $0.266 $0.264 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC Thermistors 470 OHM 50% SMD 0805 PRF21BE471QB5RA Murata Electronics 1: $0.547 6,665In Stock	Mfr. Part # PRF21BE471QB5RA Mouser Part # 81-PRF21BE471QB5RA	Murata Electronics	PTC Thermistors 470 OHM 50% SMD 0805 Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	6,665In Stock	Cut Tape $0.547 $0.513 $0.454 $0.402 Reel $0.275 View $0.354 $0.298 $0.271 $0.266 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC Thermistors 470 OHM 50% SMD 0603 PRF18BG471RB5RB Murata Electronics 1: $0.59 4,032In Stock	Mfr. Part # PRF18BG471RB5RB Mouser Part # 81-PRF18BG471RB5RB	Murata Electronics	PTC Thermistors 470 OHM 50% SMD 0603 Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	4,032In Stock	$0.59 $0.54 $0.485 $0.422 View $0.377 $0.347 $0.346 $0.321 $0.317	Min.: 1 Mult.: 1
PTC Thermistors PRF15BA102RB6RC Murata Electronics 1: $0.259 9,809In Stock	Mfr. Part # PRF15BA102RB6RC Mouser Part # 81-PRF15BA102RB6RC	Murata Electronics	PTC Thermistors Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	9,809In Stock	Cut Tape $0.259 $0.215 $0.189 $0.151 View Reel $0.095 $0.132 $0.127 $0.114 $0.095 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
PTC Thermistors PRF18BE471RB5RB Murata Electronics 1: $0.59 3,860In Stock	Mfr. Part # PRF18BE471RB5RB Mouser Part # 81-PRF18BE471RB5RB	Murata Electronics	PTC Thermistors Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	3,860In Stock	Cut Tape $0.59 $0.549 $0.485 $0.462 Reel $0.336 View $0.415 $0.347 $0.324 $0.318 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC PRF03BA102QB7RL Murata Electronics 1: $0.187 12,000In Stock New Product	Mfr. Part # PRF03BA102QB7RL Mouser Part # 81-PRF03BA102QB7RL New Product	Murata Electronics	PTC Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC Learn More about Murata Electronics murata auto prf ptc thermistors	Datasheet	12,000In Stock	Cut Tape $0.187 $0.158 $0.14 $0.117 View Reel $0.073 $0.102 $0.098 $0.088 $0.084 $0.073	Min.: 1 Mult.: 1 : 15,000
PTC Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC PRF03BA102QS7RL Murata Electronics 1: $0.23 10,400In Stock New Product	Mfr. Part # PRF03BA102QS7RL Mouser Part # 81-PRF03BA102QS7RL New Product	Murata Electronics	PTC Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC Learn More about Murata Electronics murata auto prf ptc thermistors	Datasheet	10,400In Stock	Cut Tape $0.23 $0.192 $0.168 $0.135 View Reel $0.088 $0.12 $0.114 $0.102 $0.098 $0.088	Min.: 1 Mult.: 1 : 15,000
PTC Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC PRF03BD102QB7RL Murata Electronics 1: $0.187 12,000In Stock New Product	Mfr. Part # PRF03BD102QB7RL Mouser Part # 81-PRF03BD102QB7RL New Product	Murata Electronics	PTC Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC Learn More about Murata Electronics murata auto prf ptc thermistors	Datasheet	12,000In Stock	Cut Tape $0.187 $0.158 $0.14 $0.117 View Reel $0.073 $0.102 $0.098 $0.088 $0.084 $0.073	Min.: 1 Mult.: 1 : 15,000
PTC Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC PRF03BD102QS7RL Murata Electronics 1: $0.23 11,968In Stock New Product	Mfr. Part # PRF03BD102QS7RL Mouser Part # 81-PRF03BD102QS7RL New Product	Murata Electronics	PTC Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC Learn More about Murata Electronics murata auto prf ptc thermistors	Datasheet	11,968In Stock	Cut Tape $0.23 $0.192 $0.168 $0.135 View Reel $0.088 $0.12 $0.114 $0.102 $0.098 $0.088	Min.: 1 Mult.: 1 : 15,000
PTC Thermistors 0.6x0.3mm 1kohm 115+/-5degC PRF03BB102QB7RL Murata Electronics 1: $0.158 13,539In Stock New Product	Mfr. Part # PRF03BB102QB7RL Mouser Part # 81-PRF03BB102QB7RL New Product	Murata Electronics	PTC Thermistors 0.6x0.3mm 1kohm 115+/-5degC Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	13,539In Stock	Cut Tape $0.158 $0.143 $0.124 $0.118 View Reel $0.076 $0.104 $0.098 $0.088 $0.081 $0.076	Min.: 1 Mult.: 1 : 15,000
PTC Thermistors 0.6x0.3mm 1kohm 105+/-5degC PRF03BC102QB7RL Murata Electronics 1: $0.158 14,465In Stock New Product	Mfr. Part # PRF03BC102QB7RL Mouser Part # 81-PRF03BC102QB7RL New Product	Murata Electronics	PTC Thermistors 0.6x0.3mm 1kohm 105+/-5degC Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	14,465In Stock	Cut Tape $0.158 $0.143 $0.124 $0.118 View Reel $0.076 $0.104 $0.098 $0.088 $0.081 $0.076	Min.: 1 Mult.: 1 : 15,000
PTC Thermistors 33 OHM 20% SMD 0603 PRG18BB330MB1RB Murata Electronics 1: $0.36 145,329In Stock	Mfr. Part # PRG18BB330MB1RB Mouser Part # 81-PRG18BB330MB1RB	Murata Electronics	PTC Thermistors 33 OHM 20% SMD 0603 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	145,329In Stock	Cut Tape $0.36 $0.331 $0.275 $0.229 Reel $0.148 View $0.215 $0.161 $0.132 $0.128 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC Thermistors 4.7 OHM 20% SMD 0805 PRG18BC4R7MM1RB Murata Electronics 1: $0.562 10,689In Stock NRND	Mfr. Part # PRG18BC4R7MM1RB Mouser Part # 81-PRG18BC4R7MM1RB NRND	Murata Electronics	PTC Thermistors 4.7 OHM 20% SMD 0805 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	10,689In Stock	Cut Tape $0.562 $0.516 $0.429 $0.356 Reel $0.258 View $0.328 $0.281 $0.249 $0.242 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC Thermistors PRF15BB102RB6RC Murata Electronics 1: $0.216 56,825In Stock	Mfr. Part # PRF15BB102RB6RC Mouser Part # 81-PRF15BB102RB6RC	Murata Electronics	PTC Thermistors Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	56,825In Stock	Cut Tape $0.216 $0.194 $0.17 $0.156 Reel $0.108 View $0.132 $0.127 $0.114 $0.104 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
PTC Thermistors 470 OHM 50% SMD 0603 PRF18BA471QB5RB Murata Electronics 1: $0.288 64,034In Stock	Mfr. Part # PRF18BA471QB5RB Mouser Part # 81-PRF18BA471QB5RB	Murata Electronics	PTC Thermistors 470 OHM 50% SMD 0603 Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	64,034In Stock	Cut Tape $0.288 $0.261 $0.245 $0.228 View Reel $0.163 $0.199 $0.179 $0.163 MouseReel Available	Min.: 1 Mult.: 1 Max.: 4,000 : 4,000
PTC Thermistors 100 OHM 20% SMD 0603 PRG18BB101MB1RB Murata Electronics 1: $0.374 37,701In Stock 32,000Expected 2026-12-03	Mfr. Part # PRG18BB101MB1RB Mouser Part # 81-PRG18BB101MB1RB	Murata Electronics	PTC Thermistors 100 OHM 20% SMD 0603 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	37,701In Stock 32,000Expected 2026-12-03	Cut Tape $0.374 $0.337 $0.279 $0.233 Reel $0.15 View $0.219 $0.164 $0.135 $0.13 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC Thermistors 0603 47ohm 20% SMD PRG18BB470MB1RB Murata Electronics 1: $0.562 54,756In Stock 44,000Expected 2026-11-26	Mfr. Part # PRG18BB470MB1RB Mouser Part # 81-PRG18BB470MB1RB	Murata Electronics	PTC Thermistors 0603 47ohm 20% SMD Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	54,756In Stock 44,000Expected 2026-11-26	Cut Tape $0.562 $0.49 $0.413 $0.343 Reel $0.225 View $0.315 $0.246 $0.203 $0.202 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC Thermistors 470 OHM 20% SMD 0603 PRG18BB471MB1RB Murata Electronics 1: $0.36 38,558In Stock 24,000Expected 2026-11-16	Mfr. Part # PRG18BB471MB1RB Mouser Part # 81-PRG18BB471MB1RB	Murata Electronics	PTC Thermistors 470 OHM 20% SMD 0603 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	38,558In Stock 24,000Expected 2026-11-16	Cut Tape $0.36 $0.331 $0.275 $0.229 Reel $0.156 View $0.219 $0.171 $0.141 $0.135 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC Thermistors 2.2 OHM 20% SMD 0603 PRG18BC2R2MM1RB Murata Electronics 1: $0.59 Non-Stocked Lead-Time 10 Weeks NRND	Mfr. Part # PRG18BC2R2MM1RB Mouser Part # 81-PRG18BC2R2MM1RB NRND	Murata Electronics	PTC Thermistors 2.2 OHM 20% SMD 0603 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	Non-Stocked Lead-Time 10 Weeks	Cut Tape $0.59 $0.537 $0.42 $0.376 Reel $0.242 View $0.341 $0.265 $0.217 $0.216 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC Thermistors 3.3 OHM 20% SMD 0603 PRG18BC3R3MM1RB Murata Electronics 1: $0.562 3,344In Stock NRND	Mfr. Part # PRG18BC3R3MM1RB Mouser Part # 81-PRG18BC3R3MM1RB NRND	Murata Electronics	PTC Thermistors 3.3 OHM 20% SMD 0603 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	3,344In Stock	Cut Tape $0.562 $0.514 $0.428 $0.354 Reel $0.281 View $0.327 $0.292 $0.255 $0.251 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
Aluminum Organic Polymer Capacitors ECASD40E337M006KA0 Murata Electronics 1: $2.68 2,718In Stock	Mfr. Part # ECASD40E337M006KA0 Mouser Part # 81-ECASD40E337M006KA	Murata Electronics	Aluminum Organic Polymer Capacitors Learn More about Murata Electronics murataecaspolymer	Datasheet	2,718In Stock	Cut Tape $2.68 $1.81 $1.45 $1.31 Reel $0.949 View $1.03 $0.904 MouseReel Available	Min.: 1 Mult.: 1 Max.: 9,000 : 3,000
PTC Thermistors 470 OHM 50% SMD 0603 PRF18BG471QB5RB Murata Electronics 1: $0.245 24,053In Stock 60,000On Order	Mfr. Part # PRF18BG471QB5RB Mouser Part # 81-PRF18BG471QB5RB	Murata Electronics	PTC Thermistors 470 OHM 50% SMD 0603 Learn More about Murata Electronics murata prf ptc thermistors	Datasheet	24,053In Stock 60,000On Order On Order Ship Dates Mfr. #: PRF18BG471QB5RB Stock: 24,053 Can Ship Immediately On Order: 28,000 Expected 2026-10-23 32,000 Expected 2026-12-31 Factory Lead-Time: 13 Weeks	Cut Tape $0.245 $0.222 $0.194 $0.184 Reel $0.134 View $0.161 $0.14 $0.127 $0.124 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC Thermistors 4.7 OHM 20% SMD 0805 PRG21BC4R7MM1RA Murata Electronics 1: $0.72 8,226In Stock	Mfr. Part # PRG21BC4R7MM1RA Mouser Part # 81-PRG21BC4R7MM1RA	Murata Electronics	PTC Thermistors 4.7 OHM 20% SMD 0805 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	8,226In Stock	Cut Tape $0.72 $0.677 $0.631 $0.60 View Reel $0.436 $0.572 $0.516 $0.485 $0.436 MouseReel Available	Min.: 1 Mult.: 1 : 4,000

POSISTOR® PTC Thermistors

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POSISTOR® PTC Thermistors

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