Resettable Fuses - PPTC

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PTC Fuses for AC/DC Power Supplies

A Positive Thermal Coefficient fuse, or PTC thermistor, is a thermally sensitive semiconductor resistor that increases in resistance as temperature increases to limit current to a load. When the voltage input for a power supply is too far above or below what is specified, the excess current can damage components. Besides shutting down the power supply altogether, one can effectively limit the current by using the predictable resistive response of a PTC.

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Part #

Resettable Fuses - PPTC Radial Lead .3A 72V 40A Imax

RXEF030-2
Littelfuse
1: S/1.95
3,286In Stock
6,000Expected 12/2/2026

Mfr. Part #
RXEF030-2

Mouser Part #
650-RXEF030-2

Littelfuse

Resettable Fuses - PPTC Radial Lead .3A 72V 40A Imax

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Datasheet

Product Comments

3,286In Stock

6,000Expected 12/2/2026

Cut Tape

S/1.95

S/1.66

S/1.51

S/1.30

Reel

S/0.81

View

Min.: 1
Mult.: 1

: 3,000

RXEF

PCB Mount

Radial

300 mA

72 VDC

600 mA

40 A

2.1 Ohms

- 40 C

+ 85 C

5.8 mm

Reel, Cut Tape

Resettable Fuses - PPTC Radial Lead .5A 72V 40A Imax

RXEF050-2
Littelfuse
1: S/2.02
4,887In Stock
6,000Expected 8/20/2026

Mfr. Part #
RXEF050-2

Mouser Part #
650-RXEF050-2

Littelfuse

Resettable Fuses - PPTC Radial Lead .5A 72V 40A Imax

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Datasheet

Product Comments

4,887In Stock

6,000Expected 8/20/2026

Cut Tape

S/2.02

S/1.78

S/1.53

S/1.35

Reel

S/0.81

View

Min.: 1
Mult.: 1

: 3,000

RXEF

PCB Mount

Radial

500 mA

72 VDC

1 A

40 A

1.17 Ohms

- 40 C

+ 85 C

5.8 mm

Reel, Cut Tape

Resettable Fuses - PPTC Radial Lead .75A 72V 40A Imax

RXEF075S
Littelfuse
1: S/1.83
215In Stock
1,000Expected 8/18/2026

Mfr. Part #
RXEF075S

Mouser Part #
650-RXEF075S

Littelfuse

Resettable Fuses - PPTC Radial Lead .75A 72V 40A Imax

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Datasheet

Product Comments

215In Stock

1,000Expected 8/18/2026

S/1.83

S/1.66

S/1.38

S/1.14

View

Min.: 1
Mult.: 1

RXEF

PCB Mount

Radial

750 mA

72 VDC

1.5 A

40 A

600 mOhms

- 40 C

+ 85 C

5.8 mm

Bulk

Resettable Fuses - PPTC Radial Lead 2.5A 72V 40A Imax

RXEF250-2
Littelfuse
1: S/3.97
1,807In Stock

Mfr. Part #
RXEF250-2

Mouser Part #
650-RXEF250-2

Littelfuse

Resettable Fuses - PPTC Radial Lead 2.5A 72V 40A Imax

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Datasheet

Product Comments

1,807In Stock

Cut Tape

S/3.97

S/3.64

S/2.96

S/2.79

Reel

S/1.83

View

Min.: 1
Mult.: 1

: 1,000

RXEF

PCB Mount

Radial

2.5 A

72 VDC

5 A

40 A

130 mOhms

- 40 C

+ 85 C

10.9 mm

Reel, Cut Tape

Resettable Fuses - PPTC 15V 40A 0.05Ohms

SMD300F/15-2
Littelfuse
1: S/2.76
4,101In Stock
8,000Expected 11/11/2026

Mfr. Part #
SMD300F/15-2

Mouser Part #
650-SMD300F/15-2

Littelfuse

Resettable Fuses - PPTC 15V 40A 0.05Ohms

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Datasheet

4,101In Stock

8,000Expected 11/11/2026

Cut Tape

S/2.76

S/2.45

S/2.10

S/1.94

Reel

S/1.17

View

MouseReel Available

Min.: 1
Mult.: 1

: 2,000

SMD

SMD/SMT

3 A

15 VDC

6 A

40 A

50 mOhms

2920 (7450 metric)

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

Resettable Fuses - PPTC Polyswitch 0.26A Restive Range -2

TS250-130F-RA-2
Littelfuse
1: S/6.19
1,120In Stock

Mfr. Part #
TS250-130F-RA-2

Mouser Part #
650-TS250-130F-RA-2

Littelfuse

Resettable Fuses - PPTC Polyswitch 0.26A Restive Range -2

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Datasheet

1,120In Stock

Cut Tape

S/6.19

S/5.33

S/4.75

Reel

S/2.70

MouseReel Available

Min.: 1
Mult.: 1

: 1,500

TS250

PCB Mount

SMD/SMT

130 mA

60 VDC

260 mA

3 A

15 Ohms

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

Resettable Fuses - PPTC 250V .250A-HD 3A MAX (R)

TSM600-250F-RA-2
Littelfuse
1: S/31.88
107In Stock

Mfr. Part #
TSM600-250F-RA-2

Mouser Part #
650-TSM600-250F-RA-2

Littelfuse

Resettable Fuses - PPTC 250V .250A-HD 3A MAX (R)

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Datasheet

107In Stock

Cut Tape

S/31.88

S/27.56

S/25.42

S/21.10

S/15.38

Reel

S/15.38

MouseReel Available

Min.: 1
Mult.: 1

: 200

TSM600

PCB Mount

SMD/SMT

250 mA

250 VDC

860 mA

3 A

5 Ohms

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

Resettable Fuses - PPTC 24V 3.0A-HD 20A MAX

MF-LSMF300/24X-2
Bourns
1: S/4.09
18,802In Stock
24,000Expected 11/10/2026

Mfr. Part #
MF-LSMF300/24X-2

Mouser Part #
652-MF-LSMF300/24X-2

Bourns

Resettable Fuses - PPTC 24V 3.0A-HD 20A MAX

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Datasheet

18,802In Stock

24,000Expected 11/10/2026

Cut Tape

S/4.09

S/3.06

S/2.32

S/2.25

View

Reel

S/1.92

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

MF-LSMF

SMD/SMT

3 A

24 VDC

5.2 A

40 A

75 mOhms

2920 (7450 metric)

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

Resettable Fuses - PPTC 1.85A 33V 2920

2920L185DR
Littelfuse
1: S/3.19
88,360On Order

Mfr. Part #
2920L185DR

Mouser Part #
576-2920L185

Littelfuse

Resettable Fuses - PPTC 1.85A 33V 2920

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Datasheet

88,360On Order

Cut Tape

S/3.19

S/2.73

S/2.29

S/2.15

View

Reel

S/1.43

MouseReel Available

Min.: 1
Mult.: 1

: 1,500

2920L

SMD/SMT

1.85 A

33 VDC

3.7 A

40 A

150 mOhms

2920 (7450 metric)

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

Resettable Fuses - PPTC 33V 1.85A-HD 40A MAX

MF-LSMF185/33X-2
Bourns
1: S/3.46
11,951On Order

Mfr. Part #
MF-LSMF185/33X-2

Mouser Part #
652-MF-LSMF185/33X-2

Bourns

Resettable Fuses - PPTC 33V 1.85A-HD 40A MAX

Learn More

Datasheet

11,951On Order

Cut Tape

S/3.46

S/2.83

S/2.53

S/2.01

View

Reel

S/1.22

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

MF-LSMF

SMD/SMT

1.85 A

33 VDC

3.7 A

40 A

150 mOhms

2920 (7450 metric)

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

Resettable Fuses - PPTC 15V 1206 .500A POLYFUSE

1206L050/15YR
Littelfuse
1: S/2.06
23,970Expected 10/1/2026

Mfr. Part #
1206L050/15YR

Mouser Part #
576-1206L050/15YR

Littelfuse

Resettable Fuses - PPTC 15V 1206 .500A POLYFUSE

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Datasheet

23,970Expected 10/1/2026

Cut Tape

S/2.06

S/1.81

S/1.58

S/1.36

View

Reel

S/0.891

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

1206L

SMD/SMT

500 mA

15 VDC

1 A

100 A

750 mOhms

1206 (3216 metric)

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

Resettable Fuses - PPTC 0.30A 60V 2920

2920L030DR
Littelfuse
1: S/2.69
20,819Expected 8/13/2026

Mfr. Part #
2920L030DR

Mouser Part #
576-2920L030

Littelfuse

Resettable Fuses - PPTC 0.30A 60V 2920

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Datasheet

20,819Expected 8/13/2026

Cut Tape

S/2.69

S/2.19

S/2.02

S/1.67

Reel

S/1.39

View

MouseReel Available

Min.: 1
Mult.: 1

: 1,500

2920L

SMD/SMT

300 mA

60 VDC

600 mA

10 A

4.8 Ohms

2920 (7450 metric)

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

Resettable Fuses - PPTC PTC 15V 2920 3A

2920L300/15DR
Littelfuse
1: S/3.50
17,942Expected 11/3/2026

Mfr. Part #
2920L300/15DR

Mouser Part #
576-2920L300/15DR

Littelfuse

Resettable Fuses - PPTC PTC 15V 2920 3A

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Datasheet

17,942Expected 11/3/2026

Cut Tape

S/3.50

S/3.23

S/2.64

S/2.43

View

Reel

S/1.60

MouseReel Available

Min.: 1
Mult.: 1

: 1,500

2920L

SMD/SMT

3 A

15 VDC

5 A

40 A

48 mOhms

2920 (7450 metric)

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

Resettable Fuses - PPTC 1.35A 60V RADIAL

60R135XF
Littelfuse
1: S/3.97
8,167On Order

Mfr. Part #
60R135XF

Mouser Part #
576-60R135

Littelfuse

Resettable Fuses - PPTC 1.35A 60V RADIAL

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Datasheet

8,167On Order

S/3.97

S/3.64

S/2.87

S/2.58

View

Min.: 1
Mult.: 1

60R

PCB Mount

Radial

1.35 A

60 VDC

2.7 A

40 A

300 mOhms

- 40 C

+ 85 C

5.1 mm

Bulk

Resettable Fuses - PPTC RESETTABLE FUSE 220VOLT 25OHM

CMF-RL25U-0
Bourns
1: S/2.76
14,000Expected 11/16/2026

Mfr. Part #
CMF-RL25U-0

Mouser Part #
652-CMF-RL25U-0

Bourns

Resettable Fuses - PPTC RESETTABLE FUSE 220VOLT 25OHM

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Datasheet

14,000Expected 11/16/2026

S/2.76

S/2.48

S/2.11

S/1.81

View

Min.: 1
Mult.: 1

CMF-RL

PCB Mount

Radial

60 mA

230 VAC

150 mA

900 mA

25 Ohms

- 40 C

+ 125 C

5 mm

Bulk

Resettable Fuses - PPTC 60V/250V .080A TELECOM

250R080U
Littelfuse
1: S/3.04
1,474Expected 8/13/2026

Mfr. Part #
250R080U

Mouser Part #
576-250R080U

Littelfuse

Resettable Fuses - PPTC 60V/250V .080A TELECOM

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Datasheet

1,474Expected 8/13/2026

S/3.04

S/2.79

S/2.32

S/2.14

View

Min.: 1
Mult.: 1

250R

PCB Mount

Radial

80 mA

60 VDC

160 mA

3 A

33 Ohms

- 40 C

+ 85 C

5.1 mm

Bulk

Resettable Fuses - PPTC 60V .10A RADIAL LEAD

60R010XPR
Littelfuse
1: S/2.88
3,700Expected 12/1/2026

Mfr. Part #
60R010XPR

Mouser Part #
576-60R010XPR

Littelfuse

Resettable Fuses - PPTC 60V .10A RADIAL LEAD

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Datasheet

3,700Expected 12/1/2026

S/2.88

S/2.61

S/2.18

S/2.00

View

Reel

S/1.27

Min.: 1
Mult.: 1

: 2,000

60R

PCB Mount

Radial

100 mA

60 VDC

200 mA

40 A

7.5 Ohms

- 40 C

+ 85 C

5.1 mm

Ammo Pack

Resettable Fuses - PPTC PTC RESETTABLE 3.0A 72V RADIAL LEADED

MF-RX300/72-0-14
Bourns
6,000: S/1.40
Non-Stocked Lead-Time 4 Weeks

Mfr. Part #
MF-RX300/72-0-14

Mouser Part #
652-MF-RX300/72-0-14

Bourns

Resettable Fuses - PPTC PTC RESETTABLE 3.0A 72V RADIAL LEADED

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Datasheet

Non-Stocked Lead-Time 4 Weeks

S/1.40

Min.: 6,000
Mult.: 3,000

MF-RX/72

PCB Mount

Radial

3 A

72 VDC

6 A

40 A

60 mOhms

- 40 C

+ 85 C

10.2 mm

Bulk

Resettable Fuses - PPTC .25A 72V 40A Imax

RXEF025-AP
Littelfuse
1: S/1.95
Non-Stocked Lead-Time 17 Weeks

Mfr. Part #
RXEF025-AP

Mouser Part #
650-RXEF025-AP

Littelfuse

Resettable Fuses - PPTC .25A 72V 40A Imax

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Datasheet

Product Comments

Non-Stocked Lead-Time 17 Weeks

Cut Tape

S/1.95

S/1.79

S/1.49

S/1.35

View

Reel

S/0.833

Min.: 1
Mult.: 1

: 2,000

RXEF

PCB Mount

Radial

250 mA

72 VDC

500 mA

40 A

3 Ohms

- 40 C

+ 85 C

5.8 mm

Reel, Cut Tape

Resettable Fuses - PPTC 72V 3.75A-HD 40A RXEF

RXEF375-1
Littelfuse
1: S/4.90
Non-Stocked Lead-Time 17 Weeks

Mfr. Part #
RXEF375-1

Mouser Part #
650-RXEF375-1

Littelfuse

Resettable Fuses - PPTC 72V 3.75A-HD 40A RXEF

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Datasheet

Product Comments

Non-Stocked Lead-Time 17 Weeks

S/4.90

S/4.52

S/3.74

S/3.45

View

Min.: 1
Mult.: 1

RXEF

PCB Mount

Radial

3.75 A

72 VDC

7.5 A

40 A

80 mOhms

- 40 C

+ 85 C

10.9 mm

Bulk

Resettable Fuses - PPTC 250V .12A-HD 3A MAX

TRF250-120T-R1-B-0.5
Littelfuse
1: S/3.11
Non-Stocked Lead-Time 17 Weeks

Mfr. Part #
TRF250-120T-R1-B-0.5

Mouser Part #
650-TRF250120TR1B0.5

Littelfuse

Resettable Fuses - PPTC 250V .12A-HD 3A MAX

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Datasheet

Non-Stocked Lead-Time 17 Weeks

S/3.11

S/2.86

S/2.37

S/2.19

View

Min.: 1
Mult.: 1

TRF250

PCB Mount

Radial

120 mA

60 VDC

240 mA

3 A

16 Ohms

- 40 C

+ 85 C

5 mm

Bulk

Resettable Fuses - PPTC 0.90A 60V 0.14ohm Short Lead Length

MF-R090-0-003
Bourns
1: S/3.70
Non-Stocked

Mfr. Part #
MF-R090-0-003

Mouser Part #
652-MF-R090-0-003

Bourns

Resettable Fuses - PPTC 0.90A 60V 0.14ohm Short Lead Length

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Datasheet

Non-Stocked

S/3.70

S/2.81

S/2.64

S/1.99

View

Min.: 1
Mult.: 1

MF-R/90

PCB Mount

Radial

900 mA

60 VDC

1.8 A

40 A

310 mOhms

- 40 C

+ 85 C

5.1 mm

Bulk

PTC Fuses for AC/DC Power Supplies

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Resources

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0805L
1206L
1210L
16R
1812L
2016L
250R
250S
2920L
30R
600R
60R
72R
AHEF
ASMD
CMF-RL
CMF-SDP
LVR
MF-LS
MF-LSMF

50 mA
60 mA
80 mA
100 mA
110 mA
120 mA
130 mA
140 mA
150 mA
160 mA
170 mA
200 mA
250 mA
300 mA
330 mA
350 mA
400 mA
500 mA
750 mA
900 mA

150 mA
160 mA
200 mA
230 mA
240 mA
250 mA
260 mA
280 mA
290 mA
300 mA
320 mA
340 mA
370 mA
390 mA
400 mA
420 mA
450 mA
500 mA
560 mA
600 mA

8.6 mOhms
10.2 mOhms
13.5 mOhms
16 mOhms
20 mOhms
30 mOhms
31 mOhms
48 mOhms
50 mOhms
60 mOhms
68 mOhms
70 mOhms
75 mOhms
80 mOhms
97.5 mOhms
100 mOhms
110 mOhms
120 mOhms
125 mOhms
130 mOhms