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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Qty. RoHS ECAD Model Series
Resistance
Tolerance
Mounting Style
Termination Style
Minimum Operating Temperature
Maximum Operating Temperature
Qualification
Packaging
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 1 OHM 20% SMD 0805
Datasheet
8,231In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG21-MM1RA 1 Ohms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors
Datasheet
380In Stock
4,000Expected 18-02-2026
Min.: 1
Mult.: 1
Reel: 4,000

PRG21-MS5RA 22 Ohms 20 % PCB Mount SMD/SMT - 40 C + 105 C Reel, Cut Tape
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 33 OHM 20% SMD 0603
Datasheet
7,500In Stock
4,000Expected 14-04-2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG18-MS1RB 33 Ohms 20 % PCB Mount SMD/SMT - 40 C + 75 C AEC-Q100 Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 470 OHM 20% SMD 0603
Datasheet
11,467In Stock
32,000On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG18-MB1RB 47 Ohms 20 % PCB Mount SMD/SMT - 20 C + 75 C Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 22 OHM 20% SMD 0805
Datasheet
10,664In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

PRG21-MS1RK 22 Ohms 20 % PCB Mount SMD/SMT - 40 C + 105 C AEC-Q100 Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 15 OHM 20% SMD 0805
Datasheet
11,531In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

PRG21-MB1RK 15 Ohms 20 % PCB Mount SMD/SMT - 10 C + 60 C Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 22 OHM 20% SMD 0805
Datasheet
9,233In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

PRG21-MB1RK 22 Ohms 20 % PCB Mount SMD/SMT - 10 C + 60 C Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 6.8 OHM 20% SMD 0805
Datasheet
13,857In Stock
12,000Expected 26-02-2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG21-MM1RA 6.8 Ohms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors
Datasheet
6,946In Stock
20,000Expected 05-03-2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG18-MM1RB 22 Ohms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors
Datasheet
2,808In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG21-MM1RA 3.3 Ohms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 100 OHM 20% SMD 0603
Datasheet
12,320In Stock
8,000Expected 01-05-2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG18-MB1RB 100 Ohms 20 % PCB Mount SMD/SMT - 20 C + 75 C Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 100 OHM 20% SMD 0603
Datasheet
2,883In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG18-MS1RB 100 Ohms 20 % PCB Mount SMD/SMT - 40 C + 75 C AEC-Q100 Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 220 OHM 20% SMD 0603
Datasheet
13,772In Stock
32,000On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG18-MB1RB 220 Ohms 20 % PCB Mount SMD/SMT - 20 C + 75 C Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 33 OHM 20% SMD 0603
Datasheet
241In Stock
55,700On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG18-MB1RB 33 Ohms 20 % PCB Mount SMD/SMT - 20 C + 75 C Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 470 OHM 20% SMD 0603
Datasheet
129In Stock
16,000On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG18-MB1RB 470 Ohms 20 % PCB Mount SMD/SMT - 20 C + 75 C Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 42 OHM 20% SMD 0805
Datasheet
4,130In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG21-MB1RA 42 Ohms 20 % PCB Mount SMD/SMT - 10 C + 60 C Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 42 OHM 20% SMD 0805
Datasheet
1,584In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG21-MS1RA 42 Ohms 20 % PCB Mount SMD/SMT - 40 C + 105 C AEC-Q100 Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 0.2 OHM 20% SMD 0805
Datasheet
2,491In Stock
4,000Expected 13-04-2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG21-MM1RA 200 mOhms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 0.6 OHM 20% SMD 0805
Datasheet
475In Stock
4,000Expected 12-03-2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG21-MM1RA 600 mOhms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 2.2 OHM 20% SMD 0805
Datasheet
3,723In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG21-MM1RA 2.2 Ohms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors 4.7 OHM 20% SMD 0805
Datasheet
3,985In Stock
4,000Expected 18-02-2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

PRG21-MM1RA 4.7 Ohms 20 % PCB Mount SMD/SMT - 20 C + 85 C Reel, Cut Tape, MouseReel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 4,000
Mult.: 4,000
Reel: 4,000

PRG18-MS1RB 220 Ohms 20 % PCB Mount SMD/SMT - 40 C + 75 C AEC-Q100 Reel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 4,000
Mult.: 4,000

PRG18-MS1RB 47 Ohms 20 % PCB Mount SMD/SMT - 40 C + 75 C AEC-Q100 Bulk
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 4,000
Mult.: 4,000
Reel: 4,000

PRG18-MS1RB 470 Ohms 20 % PCB Mount SMD/SMT - 40 C + 75 C AEC-Q100 Reel
Murata Electronics PTC (Positive Temperature Coefficient) Thermistors
Datasheet
Lead-Time 12 Weeks
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

PRG21-MS5RA 22 Ohms 20 % PCB Mount SMD/SMT - 10 C + 60 C Reel, Cut Tape, MouseReel