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 € 22.041In 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	22.041In 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 0.2 OHM 20% SMD 0805 PRG21BC0R2MM1RA Murata Electronics 1: 0,645 € 7.824In 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	7.824In Stock	Cut Tape 0,645 € 0,59 € 0,49 € 0,47 € View Reel 0,266 € 0,452 € 0,407 € 0,385 € 0,287 € 0,266 € 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 15 OHM 20% SMD 0805 PRG21BB150MB1RK Murata Electronics 1: 0,473 € 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 0,473 € 0,44 € 0,414 € 0,372 € View Reel 0,218 € 0,34 € 0,308 € 0,284 € 0,262 € 0,218 € 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 PRG21AR220MS5RA Murata Electronics 1: 0,851 € 4.000In Stock	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	4.000In Stock	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 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 € 0,302 € 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 100 OHM 20% SMD 0603 PRG18BB101MB1RB Murata Electronics 1: 0,224 € 32.183In Stock 32.000Expected 04/12/2026	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	32.183In Stock 32.000Expected 04/12/2026	Cut Tape 0,224 € 0,201 € 0,167 € 0,139 € Reel 0,094 € 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 33 OHM 20% SMD 0603 PRG18BB330MB1RB Murata Electronics 1: 0,215 € 137.806In 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	137.806In Stock	Cut Tape 0,215 € 0,198 € 0,164 € 0,137 € Reel 0,088 € 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 0603 47ohm 20% SMD PRG18BB470MB1RB Murata Electronics 1: 0,31 € 56.052In Stock 39.500Expected 30/11/2026	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	56.052In Stock 39.500Expected 30/11/2026	Cut Tape 0,31 € 0,277 € 0,232 € 0,192 € Reel 0,138 € View 0,183 € 0,169 € 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 € 59.951In Stock	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	59.951In Stock	Cut Tape 0,215 € 0,198 € 0,164 € 0,137 € Reel 0,094 € View 0,131 € 0,102 € 0,084 € 0,082 € 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 € 8.879In Stock 20.000On Order	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	8.879In Stock 20.000On Order On Order Ship Dates Mfr. No: PRG18BC220MM1RB Stock: 8.879 Can Dispatch Immediately On Order: 8.000 Expected 28/01/2027 12.000 Expected 11/02/2027 Factory Lead Time: 12 Weeks	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: 0,516 € 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 04/12/2026 9.000 Expected 11/12/2026 Factory Lead Time: 12 Weeks	Cut Tape 0,516 € 0,471 € 0,426 € 0,391 € View Reel 0,236 € 0,349 € 0,324 € 0,296 € 0,274 € 0,236 € 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 2.2 OHM 20% SMD 0805 PRG21BC2R2MM1RA Murata Electronics 1: 0,516 € 10.728In 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	10.728In Stock	Cut Tape 0,516 € 0,47 € 0,441 € 0,391 € View Reel 0,272 € 0,361 € 0,324 € 0,299 € 0,276 € 0,272 € 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 4.7 OHM 20% SMD 0805 PRG21BC4R7MM1RA Murata Electronics 1: 0,43 € 7.733In 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	7.733In 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 € 33.753In Stock	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	33.753In Stock	Cut Tape 0,43 € 0,403 € 0,376 € 0,358 € View Reel 0,25 € 0,341 € 0,307 € 0,289 € 0,25 € 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 220 OHM 20% SMD 0603 PRG18BB221MB1RB Murata Electronics 1: 0,241 € 4.979In Stock 216.000On 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	4.979In Stock 216.000On Order On Order Ship Dates Mfr. No: PRG18BB221MB1RB Stock: 4.979 Can Dispatch Immediately On Order: 36.000 Expected 04/12/2026 60.000 Expected 24/12/2026 120.000 Expected 05/02/2027 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 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 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 42 OHM 20% SMD 0805 PRG21AR420MB1RA Murata Electronics 1: 0,482 € 556In Stock 4.000Expected 28/01/2027	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	556In Stock 4.000Expected 28/01/2027	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 € 717In 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	717In 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 € 4.193In 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	4.193In Stock	Cut Tape 0,525 € 0,48 € 0,464 € 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 PRG21BC3R3MM1RA Murata Electronics 1: 0,542 € 1.691In Stock 4.000Expected 22/01/2027	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	1.691In Stock 4.000Expected 22/01/2027	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 100 OHM 20% SMD 0603 PRG18BB101MS1RB Murata Electronics 1: 0,43 € Non-Stocked Lead-Time 12 Weeks	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	Non-Stocked Lead-Time 12 Weeks	Cut Tape 0,43 € 0,396 € 0,379 € 0,329 € View Reel 0,224 € 0,30 € 0,273 € 0,252 € 0,242 € 0,224 € 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 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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PRG Series PTC Thermistors

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