PTC (Positive Temperature Coefficient) Thermistors

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PRG Series PTC Thermistors

Murata Electronics PRG Series PTC Thermistors are posistors for overcurrent protection that offer a voltage rating up to 32V and a current range of 10mA to 75mA. These thermistors feature a compact design, low profile, and a wide operating temperature range of -20°C to +85°C. PRG thermistors automatically return to their initial state when the overcurrent is eliminated and can be used repeatedly. Murata Electronics PRG Series PTC Thermistors are suitable for various types of equipment, including aircraft, aerospace, disaster, medical, crime prevention, and transportation.

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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.	Series	Resistance	Tolerance	Mounting Style	Termination Style	Minimum Operating Temperature	Maximum Operating Temperature	Qualification	Packaging
PTC (Positive Temperature Coefficient) Thermistors PRG21BC1R0MM1RK Murata Electronics 1: € 0,447 25 041In Stock	Mfr. Part No. PRG21BC1R0MM1RK Mouser Part No 81-PRG21BC1R0MM1RK	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	25 041In Stock	Cut Tape € 0,447 € 0,42 € 0,391 € 0,372 View Reel € 0,239 € 0,355 € 0,315 € 0,285 € 0,239 MouseReel Available	Min.: 1 Mult.: 1 : 3 000	PRG21-MM1RK	1 Ohms	20 %	PCB Mount	SMD/SMT	- 20 C	+ 85 C		Reel, Cut Tape, MouseReel
PTC (Positive Temperature Coefficient) Thermistors 15 OHM 20% SMD 0805 PRG21BB150MB1RK Murata Electronics 1: € 0,49 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 € 0,49 € 0,447 € 0,372 € 0,359 View Reel € 0,223 € 0,34 € 0,308 € 0,292 € 0,274 € 0,223 MouseReel Available	Min.: 1 Mult.: 1 : 3 000	PRG21-MB1RK	15 Ohms	20 %	PCB Mount	SMD/SMT	- 10 C	+ 60 C		Reel, Cut Tape, MouseReel
PTC (Positive Temperature Coefficient) Thermistors 0.2 OHM 20% SMD 0805 PRG21BC0R2MM1RA Murata Electronics 1: € 0,645 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 € 0,645 € 0,574 € 0,49 € 0,47 View Reel € 0,265 € 0,452 € 0,407 € 0,385 € 0,287 € 0,265 MouseReel Available	Min.: 1 Mult.: 1 : 4 000	PRG21-MM1RA	200 mOhms	20 %	PCB Mount	SMD/SMT	- 20 C	+ 85 C		Reel, Cut Tape, MouseReel
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 € 0,21 € 0,31 € 0,30 € 0,261 € 0,242 € 0,21 MouseReel Available	Min.: 1 Mult.: 1 : 3 000	PRG21-MS1RK	22 Ohms	20 %	PCB Mount	SMD/SMT	- 40 C	+ 105 C	AEC-Q100	Reel, Cut Tape, MouseReel
PTC (Positive Temperature Coefficient) Thermistors 0.6 OHM 20% SMD 0805 PRG21BC0R6MM1RA Murata Electronics 1: € 0,559 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 € 0,559 € 0,516 € 0,488 € 0,428 View Reel € 0,289 € 0,396 € 0,355 € 0,328 € 0,303 € 0,289 MouseReel Available	Min.: 1 Mult.: 1 : 4 000	PRG21-MM1RA	600 mOhms	20 %	PCB Mount	SMD/SMT	- 20 C	+ 85 C		Reel, Cut Tape, MouseReel
PTC (Positive Temperature Coefficient) Thermistors 33 OHM 20% SMD 0603 PRG18BB330MB1RB Murata Electronics 1: € 0,215 144 059In 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	144 059In Stock	Cut Tape € 0,215 € 0,198 € 0,164 € 0,137 Reel € 0,089 View € 0,13 € 0,096 € 0,079 € 0,078 MouseReel Available	Min.: 1 Mult.: 1 : 4 000	PRG18-MB1RB	33 Ohms	20 %	PCB Mount	SMD/SMT	- 20 C	+ 75 C		Reel, Cut Tape, MouseReel
PTC (Positive Temperature Coefficient) Thermistors 100 OHM 20% SMD 0603 PRG18BB101MB1RB Murata Electronics 1: € 0,224 37 161In 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	37 161In Stock 32 000Expected 03/12/2026	Cut Tape € 0,224 € 0,201 € 0,167 € 0,139 Reel € 0,09 View € 0,131 € 0,098 € 0,081 € 0,079 MouseReel Available	Min.: 1 Mult.: 1 : 4 000	PRG18-MB1RB	100 Ohms	20 %	PCB Mount	SMD/SMT	- 20 C	+ 75 C		Reel, Cut Tape, MouseReel
PTC (Positive Temperature Coefficient) Thermistors 220 OHM 20% SMD 0603 PRG18BB221MB1RB Murata Electronics 1: € 0,241 28 080In 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	28 080In Stock 96 000On Order On Order Ship Dates Mfr. No: PRG18BB221MB1RB Stock: 28 080 Can Dispatch Immediately On Order: 36 000 Expected 03/12/2026 60 000 Expected 24/12/2026 Factory Lead Time: 12 Weeks	Cut Tape € 0,241 € 0,212 € 0,171 € 0,158 Reel € 0,106 View € 0,131 € 0,115 € 0,095 € 0,09 MouseReel Available	Min.: 1 Mult.: 1 : 4 000	PRG18-MB1RB	220 Ohms	20 %	PCB Mount	SMD/SMT	- 20 C	+ 75 C		Reel, Cut Tape, MouseReel
PTC (Positive Temperature Coefficient) Thermistors 0603 47ohm 20% SMD PRG18BB470MB1RB Murata Electronics 1: € 0,318 53 406In 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	53 406In Stock 44 000Expected 26/11/2026	Cut Tape € 0,318 € 0,282 € 0,237 € 0,196 Reel € 0,137 View € 0,185 € 0,162 € 0,125 MouseReel Available	Min.: 1 Mult.: 1 : 4 000	PRG18-MB1RB	47 Ohms	20 %	PCB Mount	SMD/SMT	- 20 C	+ 75 C		Reel, Cut Tape, MouseReel
PTC (Positive Temperature Coefficient) Thermistors 470 OHM 20% SMD 0603 PRG18BB471MB1RB Murata Electronics 1: € 0,215 38 208In Stock 24 000Expected 16/11/2026	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	38 208In Stock 24 000Expected 16/11/2026	Cut Tape € 0,215 € 0,198 € 0,164 € 0,137 Reel € 0,093 View € 0,131 € 0,102 € 0,083 € 0,08 MouseReel Available	Min.: 1 Mult.: 1 : 4 000	PRG18-MB1RB	470 Ohms	20 %	PCB Mount	SMD/SMT	- 20 C	+ 75 C		Reel, Cut Tape, MouseReel
PTC (Positive Temperature Coefficient) Thermistors PRG18BC220MM1RB Murata Electronics 1: € 0,292 11 419In Stock	Mfr. Part No. PRG18BC220MM1RB Mouser Part No 81-PRG18BC220MM1RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	11 419In Stock	Cut Tape € 0,292 € 0,271 € 0,24 € 0,228 View Reel € 0,169 € 0,202 € 0,176 € 0,169 MouseReel Available	Min.: 1 Mult.: 1 Max.: 4 000 : 4 000	PRG18-MM1RB	22 Ohms	20 %	PCB Mount	SMD/SMT	- 20 C	+ 85 C		Reel, Cut Tape, MouseReel
PTC (Positive Temperature Coefficient) Thermistors 22 OHM 20% SMD 0805 PRG21BB220MB1RK Murata Electronics 1: € 0,482 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 € 0,482 € 0,445 € 0,426 € 0,369 View Reel € 0,222 € 0,34 € 0,306 € 0,282 € 0,261 € 0,222 MouseReel Available	Min.: 1 Mult.: 1 : 3 000	PRG21-MB1RK	22 Ohms	20 %	PCB Mount	SMD/SMT	- 10 C	+ 60 C		Reel, Cut Tape, MouseReel
PTC (Positive Temperature Coefficient) Thermistors 4.7 OHM 20% SMD 0805 PRG21BC4R7MM1RA Murata Electronics 1: € 0,43 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 € 0,43 € 0,404 € 0,377 € 0,359 View Reel € 0,261 € 0,341 € 0,308 € 0,29 € 0,261 MouseReel Available	Min.: 1 Mult.: 1 : 4 000	PRG21-MM1RA	4.7 Ohms	20 %	PCB Mount	SMD/SMT	- 20 C	+ 85 C		Reel, Cut Tape, MouseReel
PTC (Positive Temperature Coefficient) Thermistors 6.8 OHM 20% SMD 0805 PRG21BC6R8MM1RA Murata Electronics 1: € 0,43 18 291In 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 291In 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	PRG21-MM1RA	6.8 Ohms	20 %	PCB Mount	SMD/SMT	- 20 C	+ 85 C		Reel, Cut Tape, MouseReel
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 € 0,21 € 0,30 € 0,273 € 0,252 € 0,242 € 0,21 MouseReel Available	Min.: 1 Mult.: 1 : 4 000	PRG18-MS1RB	100 Ohms	20 %	PCB Mount	SMD/SMT	- 40 C	+ 75 C	AEC-Q100	Reel, Cut Tape, MouseReel
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 € 0,379 € 0,329 View Reel € 0,191 € 0,30 € 0,273 € 0,252 € 0,232 € 0,191 MouseReel Available	Min.: 1 Mult.: 1 : 4 000	PRG18-MS1RB	33 Ohms	20 %	PCB Mount	SMD/SMT	- 40 C	+ 75 C	AEC-Q100	Reel, Cut Tape, MouseReel
PTC (Positive Temperature Coefficient) Thermistors 42 OHM 20% SMD 0805 PRG21AR420MB1RA Murata Electronics 1: € 0,482 3 656In Stock	Mfr. Part No. PRG21AR420MB1RA Mouser Part No 81-PRG21AR420MB1RA	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 42 OHM 20% SMD 0805 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	3 656In Stock	Cut Tape € 0,482 € 0,435 € 0,402 € 0,366 View Reel € 0,258 € 0,326 € 0,306 € 0,277 € 0,261 € 0,258 MouseReel Available	Min.: 1 Mult.: 1 : 4 000	PRG21-MB1RA	42 Ohms	20 %	PCB Mount	SMD/SMT	- 10 C	+ 60 C		Reel, Cut Tape, MouseReel
PTC (Positive Temperature Coefficient) Thermistors 42 OHM 20% SMD 0805 PRG21AR420MS1RA Murata Electronics 1: € 0,43 942In 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	942In 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	PRG21-MS1RA	42 Ohms	20 %	PCB Mount	SMD/SMT	- 40 C	+ 105 C	AEC-Q100	Reel, Cut Tape, MouseReel
PTC (Positive Temperature Coefficient) Thermistors 1 OHM 20% SMD 0805 PRG21BC1R0MM1RA Murata Electronics 1: € 0,525 4 484In Stock	Mfr. Part No. PRG21BC1R0MM1RA Mouser Part No 81-PRG21BC1R0MM1RA	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors 1 OHM 20% SMD 0805 Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	4 484In Stock	Cut Tape € 0,525 € 0,48 € 0,451 € 0,398 View Reel € 0,267 € 0,355 € 0,33 € 0,304 € 0,28 € 0,267 MouseReel Available	Min.: 1 Mult.: 1 Max.: 4 000 : 4 000	PRG21-MM1RA	1 Ohms	20 %	PCB Mount	SMD/SMT	- 20 C	+ 85 C		Reel, Cut Tape, MouseReel
PTC (Positive Temperature Coefficient) Thermistors 2.2 OHM 20% SMD 0805 PRG21BC2R2MM1RA Murata Electronics 1: € 0,516 4 455In 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 455In 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	PRG21-MM1RA	2.2 Ohms	20 %	PCB Mount	SMD/SMT	- 20 C	+ 85 C		Reel, Cut Tape, MouseReel
PTC (Positive Temperature Coefficient) Thermistors PRG21BC3R3MM1RA Murata Electronics 1: € 0,542 2 071In 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	2 071In 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	PRG21-MM1RA	3.3 Ohms	20 %	PCB Mount	SMD/SMT	- 20 C	+ 85 C		Reel, Cut Tape, MouseReel
PTC (Positive Temperature Coefficient) Thermistors PRG21AR220MS5RA Murata Electronics 1: € 0,851 4 000Expected 23/11/2026	Mfr. Part No. PRG21AR220MS5RA Mouser Part No 81-PRG21AR220MS5RA	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	4 000Expected 23/11/2026	Cut Tape € 0,851 € 0,647 € 0,557 € 0,538 View Reel € 0,298 € 0,458 € 0,398 € 0,352 € 0,298	Min.: 1 Mult.: 1 Max.: 12 000 : 4 000	PRG21-MS5RA	22 Ohms	20 %	PCB Mount	SMD/SMT	- 40 C	+ 105 C		Reel, Cut Tape
PTC (Positive Temperature Coefficient) Thermistors PRG18BB221MS1RB Murata Electronics 4 000: € 0,211 Non-Stocked Lead-Time 12 Weeks	Mfr. Part No. PRG18BB221MS1RB Mouser Part No 81-PRG18BB221MS1RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	Non-Stocked Lead-Time 12 Weeks	Reel € 0,211	Min.: 4 000 Mult.: 4 000 : 4 000	PRG18-MS1RB	220 Ohms	20 %	PCB Mount	SMD/SMT	- 40 C	+ 75 C	AEC-Q100	Reel
PTC (Positive Temperature Coefficient) Thermistors PRG18BB470MS1RB Murata Electronics 4 000: € 0,20 Non-Stocked Lead-Time 12 Weeks	Mfr. Part No. PRG18BB470MS1RB Mouser Part No 81-PRG18BB470MS1RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	Non-Stocked Lead-Time 12 Weeks	€ 0,20	Min.: 4 000 Mult.: 4 000	PRG18-MS1RB	47 Ohms	20 %	PCB Mount	SMD/SMT	- 40 C	+ 75 C	AEC-Q100	Bulk
PTC (Positive Temperature Coefficient) Thermistors PRG18BB471MS1RB Murata Electronics 4 000: € 0,20 Non-Stocked Lead-Time 12 Weeks	Mfr. Part No. PRG18BB471MS1RB Mouser Part No 81-PRG18BB471MS1RB	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	Non-Stocked Lead-Time 12 Weeks	Reel € 0,20	Min.: 4 000 Mult.: 4 000 : 4 000	PRG18-MS1RB	470 Ohms	20 %	PCB Mount	SMD/SMT	- 40 C	+ 75 C	AEC-Q100	Reel

PRG Series PTC Thermistors

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