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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 (USD) 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: $0.57 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 $0.57 $0.52 $0.481 $0.433 View Reel $0.266 $0.395 $0.358 $0.33 $0.305 $0.266 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 PRF18BA471QB5RB Murata Electronics 1: $0.18 64,028In 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	64,028In Stock	Cut Tape $0.18 $0.154 $0.14 $0.12 View Reel $0.097 $0.107 $0.104 $0.097 MouseReel Available	Min.: 1 Mult.: 1 Max.: 4,000 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 0.2 OHM 20% SMD 0805 PRG21BC0R2MM1RA Murata Electronics 1: $0.75 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 $0.75 $0.686 $0.57 $0.547 View Reel $0.313 $0.526 $0.473 $0.448 $0.355 $0.313 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 6.8 OHM 20% SMD 0603 PRG18BC6R8MM1RB Murata Electronics 1: $0.411 11,888In 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	11,888In Stock	Cut Tape $0.411 $0.297 $0.261 $0.224 Reel $0.167 View $0.207 $0.183 $0.15 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors PRF15BA102RB6RC Murata Electronics 1: $0.18 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 $0.18 $0.149 $0.131 $0.105 View Reel $0.066 $0.092 $0.088 $0.079 $0.066 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0805 PRF21BE471QB5RA Murata Electronics 1: $0.38 6,426In 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	6,426In Stock	Cut Tape $0.38 $0.356 $0.315 $0.279 Reel $0.191 View $0.247 $0.207 $0.19 $0.186 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 0.6 OHM 20% SMD 0805 PRG21BC0R6MM1RA Murata Electronics 1: $0.65 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 $0.65 $0.60 $0.568 $0.498 View Reel $0.336 $0.461 $0.413 $0.381 $0.352 $0.336 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 PRF18BG471RB5RB Murata Electronics 1: $0.411 3,912In 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	3,912In Stock	$0.411 $0.376 $0.337 $0.293 View $0.262 $0.238 $0.224 $0.219 $0.215	Min.: 1 Mult.: 1
PTC (Positive Temperature Coefficient) Thermistors PRF18BE471RB5RB Murata Electronics 1: $0.411 3,710In 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	3,710In Stock	Cut Tape $0.411 $0.381 $0.337 $0.321 Reel $0.233 View $0.288 $0.241 $0.226 $0.22 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC PRF03BA102QB7RL Murata Electronics 1: $0.13 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 $0.13 $0.11 $0.097 $0.081 View Reel $0.051 $0.071 $0.067 $0.06 $0.058 $0.051	Min.: 1 Mult.: 1 : 15,000
PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 125+/-5degC Curie Point 110degC PRF03BA102QS7RL Murata Electronics 1: $0.16 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 $0.16 $0.133 $0.117 $0.094 View Reel $0.06 $0.083 $0.079 $0.071 $0.067 $0.06	Min.: 1 Mult.: 1 : 15,000
PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC PRF03BD102QB7RL Murata Electronics 1: $0.13 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 $0.13 $0.11 $0.097 $0.081 View Reel $0.051 $0.071 $0.067 $0.06 $0.058 $0.051	Min.: 1 Mult.: 1 : 15,000
PTC (Positive Temperature Coefficient) Thermistors 0603 1kohm 95+/-5degC Curie Point 80degC PRF03BD102QS7RL Murata Electronics 1: $0.16 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 $0.16 $0.133 $0.117 $0.094 View Reel $0.06 $0.083 $0.079 $0.071 $0.067 $0.06	Min.: 1 Mult.: 1 : 15,000
PTC (Positive Temperature Coefficient) Thermistors 0.6x0.3mm 1kohm 115+/-5degC PRF03BB102QB7RL Murata Electronics 1: $0.11 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 $0.11 $0.099 $0.086 $0.083 View Reel $0.053 $0.072 $0.067 $0.06 $0.056 $0.053	Min.: 1 Mult.: 1 : 15,000
PTC (Positive Temperature Coefficient) Thermistors 0.6x0.3mm 1kohm 105+/-5degC PRF03BC102QB7RL Murata Electronics 1: $0.11 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 $0.11 $0.099 $0.086 $0.083 View Reel $0.053 $0.072 $0.067 $0.06 $0.056 $0.053	Min.: 1 Mult.: 1 : 15,000
PTC (Positive Temperature Coefficient) Thermistors PRF15BB102RB6RC Murata Electronics 1: $0.15 46,774In 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	46,774In Stock	Cut Tape $0.15 $0.135 $0.117 $0.108 Reel $0.076 View $0.092 $0.088 $0.079 $0.072 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 50% SMD 0603 PRF18BG471QB5RB Murata Electronics 1: $0.17 38,542In Stock 32,000Expected 2026/12/31	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	38,542In Stock 32,000Expected 2026/12/31	Cut Tape $0.17 $0.154 $0.135 $0.128 Reel $0.093 View $0.112 $0.097 $0.088 $0.086 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 100 OHM 20% SMD 0603 PRG18BB101MB1RB Murata Electronics 1: $0.261 33,183In Stock 32,000Expected 2026/12/03	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	33,183In Stock 32,000Expected 2026/12/03	Cut Tape $0.261 $0.23 $0.192 $0.162 Reel $0.109 View $0.152 $0.126 $0.095 $0.094 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 33 OHM 20% SMD 0603 PRG18BB330MB1RB Murata Electronics 1: $0.25 142,091In 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	142,091In Stock	Cut Tape $0.25 $0.23 $0.191 $0.159 Reel $0.102 View $0.151 $0.112 $0.092 $0.091 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 0603 47ohm 20% SMD PRG18BB470MB1RB Murata Electronics 1: $0.361 52,311In Stock 44,000Expected 2026/11/26	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 2026/11/26	Cut Tape $0.361 $0.322 $0.27 $0.223 Reel $0.16 View $0.213 $0.197 $0.145 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 20% SMD 0603 PRG18BB471MB1RB Murata Electronics 1: $0.25 37,251In Stock 24,000Expected 2026/11/19	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 2026/11/19	Cut Tape $0.25 $0.23 $0.191 $0.159 Reel $0.11 View $0.152 $0.131 $0.097 $0.095 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 22 OHM 20% SMD 0805 PRG21BB220MB1RK Murata Electronics 1: $0.60 5,999In 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	5,999In Stock 15,000On Order On Order Ship Dates Mfr. No: PRG21BB220MB1RK Stock: 5,999 Can Dispatch Immediately On Order: 6,000 Expected 2026/12/08 9,000 Expected 2026/12/11 Factory Lead Time: 12 Weeks	Cut Tape $0.60 $0.548 $0.495 $0.455 View Reel $0.274 $0.406 $0.377 $0.344 $0.319 $0.274 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
PTC (Positive Temperature Coefficient) Thermistors 2.2 OHM 20% SMD 0805 PRG21BC2R2MM1RA Murata Electronics 1: $0.60 10,795In Stock	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	10,795In Stock	Cut Tape $0.60 $0.547 $0.513 $0.455 View Reel $0.313 $0.42 $0.377 $0.348 $0.321 $0.313 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 4.7 OHM 20% SMD 0805 PRG21BC4R7MM1RA Murata Electronics 1: $0.50 7,809In 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	7,809In Stock	Cut Tape $0.50 $0.47 $0.438 $0.418 View Reel $0.304 $0.397 $0.358 $0.337 $0.304 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
PTC (Positive Temperature Coefficient) Thermistors 2.2 OHM 20% SMD 0603 PRG18BC2R2MM1RB Murata Electronics 1: $0.411 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 $0.411 $0.373 $0.292 $0.261 Reel $0.167 View $0.237 $0.184 $0.151 $0.15 MouseReel Available	Min.: 1 Mult.: 1 : 4,000

POSISTOR® PTC Thermistors

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POSISTOR® PTC Thermistors

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