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 0,222 € 0,355 € 0,352 € 0,31 € 0,279 € 0,222 € 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: 0,464 € 10.074In 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	10.074In Stock	Cut Tape 0,464 € 0,433 € 0,371 € 0,359 € View Reel 0,223 € 0,34 € 0,308 € 0,292 € 0,277 € 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 € 8.126In 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	8.126In Stock	Cut Tape 0,645 € 0,59 € 0,49 € 0,47 € View Reel 0,285 € 0,452 € 0,407 € 0,385 € 0,362 € 0,285 € 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 33 OHM 20% SMD 0603 PRG18BB330MB1RB Murata Electronics 1: 0,215 € 150.936In 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	150.936In Stock	Cut Tape 0,215 € 0,198 € 0,164 € 0,137 € Reel 0,089 € View 0,128 € 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 € 41.810In 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	41.810In Stock 32.000Expected 03/12/2026	Cut Tape 0,224 € 0,201 € 0,167 € 0,139 € Reel 0,091 € View 0,131 € 0,098 € 0,082 € 0,08 € 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 0603 47ohm 20% SMD PRG18BB470MB1RB Murata Electronics 1: 0,335 € 56.766In 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	56.766In Stock 44.000Expected 26/11/2026	Cut Tape 0,335 € 0,292 € 0,247 € 0,205 € Reel 0,134 € View 0,188 € 0,147 € 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 PRG18BC220MM1RB Murata Electronics 1: 0,292 € 11.929In 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	11.929In Stock	Cut Tape 0,292 € 0,271 € 0,24 € 0,228 € View Reel 0,175 € 0,202 € 0,194 € 0,175 € 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 42 OHM 20% SMD 0805 PRG21AR420MB1RA Murata Electronics 1: 0,482 € 6.096In 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	6.096In 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 6.8 OHM 20% SMD 0805 PRG21BC6R8MM1RA Murata Electronics 1: 0,43 € 18.755In 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	18.755In 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 0,208 € 0,30 € 0,273 € 0,252 € 0,242 € 0,208 € 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 € 0,376 € 0,329 € View Reel 0,22 € 0,30 € 0,273 € 0,252 € 0,232 € 0,22 € 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 470 OHM 20% SMD 0603 PRG18BB471MB1RB Murata Electronics 1: 0,215 € 11.868In Stock 52.000On Order	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	11.868In Stock 52.000On Order On Order Ship Dates Mfr. No: PRG18BB471MB1RB Stock: 11.868 Can Dispatch Immediately On Order: 28.000 Expected 01/10/2026 24.000 Expected 16/11/2026 Factory Lead Time: 12 Weeks	Cut Tape 0,215 € 0,198 € 0,164 € 0,137 € Reel 0,093 € View 0,131 € 0,102 € 0,084 € 0,081 € 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 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 0,234 € 0,31 € 0,30 € 0,261 € 0,242 € 0,234 € 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 42 OHM 20% SMD 0805 PRG21AR420MS1RA Murata Electronics 1: 0,43 € 1.142In 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	1.142In 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 0.6 OHM 20% SMD 0805 PRG21BC0R6MM1RA Murata Electronics 1: 0,559 € 3.870In 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	3.870In Stock	Cut Tape 0,559 € 0,516 € 0,501 € 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 2.2 OHM 20% SMD 0805 PRG21BC2R2MM1RA Murata Electronics 1: 0,516 € 4.908In 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	4.908In 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 € 4.438In 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	4.438In 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 1 OHM 20% SMD 0805 PRG21BC1R0MM1RA Murata Electronics 1: 0,525 € 4.759In 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	4.759In Stock	Cut Tape 0,525 € 0,48 € 0,451 € 0,398 € View Reel 0,267 € 0,365 € 0,33 € 0,305 € 0,281 € 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 4.7 OHM 20% SMD 0805 PRG21BC4R7MM1RA Murata Electronics 1: 0,43 € 4.270In Stock 4.000Expected 08/10/2026	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	4.270In Stock 4.000Expected 08/10/2026	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 220 OHM 20% SMD 0603 PRG18BB221MB1RB Murata Electronics 1: 0,215 € 70.930On 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	70.930On Order On Order Ship Dates Mfr. No: PRG18BB221MB1RB Stock: 0 On Order: 34.930 Expected 08/10/2026 36.000 Expected 03/12/2026 Factory Lead Time: 12 Weeks	Cut Tape 0,215 € 0,198 € 0,164 € 0,137 € Reel 0,088 € View 0,126 € 0,096 € 0,081 € 0,079 € 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 22 OHM 20% SMD 0805 PRG21BB220MB1RK Murata Electronics 1: 0,516 € 24.251On 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	24.251On Order On Order Ship Dates Mfr. No: PRG21BB220MB1RK Stock: 0 On Order: 9.251 Expected 01/10/2026 6.000 Expected 08/12/2026 9.000 Expected 11/12/2026 Factory Lead Time: 13 Weeks	Cut Tape 0,516 € 0,472 € 0,439 € 0,392 € View Reel 0,221 € 0,35 € 0,325 € 0,296 € 0,274 € 0,221 € 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 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 PRG21AR220MB1RK Murata Electronics 1: 0,559 € 84Factory Stock Available	Mfr. Part No. PRG21AR220MB1RK Mouser Part No 81-PRG21AR220MB1RK	Murata Electronics	PTC (Positive Temperature Coefficient) Thermistors Learn More about Murata Electronics murata prg ptc thermistors	Datasheet	84Factory Stock Available More Info Available	Cut Tape 0,559 € 0,424 € 0,365 € 0,353 € View Reel 0,212 € 0,30 € 0,261 € 0,242 € 0,212 € MouseReel Available	Min.: 1 Mult.: 1 : 3.000	PRG21-MS5RA	22 Ohms	20 %	PCB Mount	SMD/SMT	- 10 C	+ 60 C		Reel, Cut Tape, MouseReel
PTC (Positive Temperature Coefficient) Thermistors PRG18BB221MS1RB Murata Electronics 4.000: 0,20 € Non-Stocked Lead-Time 8 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 8 Weeks	Reel 0,20 €	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 4 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 4 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

PRG Series PTC Thermistors

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