Resettable Fuses - PPTC – Mouser United Kingdom

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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 9A 30V 100A Imax

RUEF900
Littelfuse
1: £0.863
1,717In Stock
16,750Expected 20/08/2026

Mfr. Part No.
RUEF900

Mouser Part No
650-RUEF900

Littelfuse

Resettable Fuses - PPTC 9A 30V 100A Imax

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Datasheet

1,717In Stock

16,750Expected 20/08/2026

£0.863

£0.796

£0.625

£0.601

View

Min.: 1
Mult.: 1

RUEF

PCB Mount

Radial

9 A

30 VDC

18 A

100 A

20 mOhms

- 40 C

+ 85 C

10.9 mm

Bulk

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

RXEF030-2
Littelfuse
1: £0.375
3,286In Stock
6,000Expected 02/12/2026

Mfr. Part No.
RXEF030-2

Mouser Part No
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 02/12/2026

Cut Tape

£0.375

£0.32

£0.291

£0.25

Reel

£0.156

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: £0.39
4,887In Stock
6,000Expected 20/08/2026

Mfr. Part No.
RXEF050-2

Mouser Part No
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 20/08/2026

Cut Tape

£0.39

£0.344

£0.295

£0.261

Reel

£0.158

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: £0.353
215In Stock
1,000Expected 18/08/2026

Mfr. Part No.
RXEF075S

Mouser Part No
650-RXEF075S

Littelfuse

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

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Datasheet

Product Comments

215In Stock

1,000Expected 18/08/2026

£0.353

£0.32

£0.265

£0.221

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: £0.766
1,807In Stock

Mfr. Part No.
RXEF250-2

Mouser Part No
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

£0.766

£0.703

£0.571

£0.539

View

Reel

£0.359

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: £0.533
4,056In Stock
8,000Expected 11/11/2026

Mfr. Part No.
SMD300F/15-2

Mouser Part No
650-SMD300F/15-2

Littelfuse

Resettable Fuses - PPTC 15V 40A 0.05Ohms

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Datasheet

4,056In Stock

8,000Expected 11/11/2026

Cut Tape

£0.533

£0.473

£0.405

£0.375

View

Reel

£0.278

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: £1.20
1,120In Stock

Mfr. Part No.
TS250-130F-RA-2

Mouser Part No
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

£1.20

£1.03

£0.917

Reel

£0.52

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: £6.15
107In Stock

Mfr. Part No.
TSM600-250F-RA-2

Mouser Part No
650-TSM600-250F-RA-2

Littelfuse

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

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Datasheet

107In Stock

Cut Tape

£6.15

£5.32

£4.91

£4.07

£2.97

Reel

£2.97

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 1.85A 33V 2920

2920L185DR
Littelfuse
1: £0.615
88,340On Order

Mfr. Part No.
2920L185DR

Mouser Part No
576-2920L185

Littelfuse

Resettable Fuses - PPTC 1.85A 33V 2920

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Datasheet

88,340On Order

Cut Tape

£0.615

£0.527

£0.443

£0.415

View

Reel

£0.276

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: £0.668
11,951Expected 27/08/2026

Mfr. Part No.
MF-LSMF185/33X-2

Mouser Part No
652-MF-LSMF185/33X-2

Bourns

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

Learn More

Datasheet

11,951Expected 27/08/2026

Cut Tape

£0.668

£0.545

£0.487

£0.388

View

Reel

£0.286

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: £0.398
51,807On Order

Mfr. Part No.
1206L050/15YR

Mouser Part No
576-1206L050/15YR

Littelfuse

Resettable Fuses - PPTC 15V 1206 .500A POLYFUSE

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Datasheet

51,807On Order

Cut Tape

£0.398

£0.35

£0.304

£0.262

View

Reel

£0.203

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: £0.518
20,819On Order

Mfr. Part No.
2920L030DR

Mouser Part No
576-2920L030

Littelfuse

Resettable Fuses - PPTC 0.30A 60V 2920

Learn More

Datasheet

20,819On Order

Cut Tape

£0.518

£0.422

£0.389

£0.323

Reel

£0.269

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: £0.676
17,942Expected 03/11/2026

Mfr. Part No.
2920L300/15DR

Mouser Part No
576-2920L300/15DR

Littelfuse

Resettable Fuses - PPTC PTC 15V 2920 3A

Learn More

Datasheet

17,942Expected 03/11/2026

Cut Tape

£0.676

£0.624

£0.518

£0.469

View

Reel

£0.363

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: £0.766
8,167On Order

Mfr. Part No.
60R135XF

Mouser Part No
576-60R135

Littelfuse

Resettable Fuses - PPTC 1.35A 60V RADIAL

Learn More

Datasheet

8,167On Order

£0.766

£0.703

£0.553

£0.497

£0.461

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: £0.533
14,000Expected 16/11/2026

Mfr. Part No.
CMF-RL25U-0

Mouser Part No
652-CMF-RL25U-0

Bourns

Resettable Fuses - PPTC RESETTABLE FUSE 220VOLT 25OHM

Learn More

Datasheet

14,000Expected 16/11/2026

£0.533

£0.478

£0.407

£0.349

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: £0.586
1,474On Order

Mfr. Part No.
250R080U

Mouser Part No
576-250R080U

Littelfuse

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

Learn More

Datasheet

1,474On Order

£0.586

£0.539

£0.448

£0.413

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: £0.555
3,700Expected 13/10/2026

Mfr. Part No.
60R010XPR

Mouser Part No
576-60R010XPR

Littelfuse

Resettable Fuses - PPTC 60V .10A RADIAL LEAD

Learn More

Datasheet

3,700Expected 13/10/2026

£0.555

£0.502

£0.421

£0.385

View

Reel

£0.245

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: £0.27
Non-Stocked Lead-Time 4 Weeks

Mfr. Part No.
MF-RX300/72-0-14

Mouser Part No
652-MF-RX300/72-0-14

Bourns

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

Learn More

Datasheet

Non-Stocked Lead-Time 4 Weeks

£0.27

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: £0.375
Non-Stocked Lead-Time 17 Weeks

Mfr. Part No.
RXEF025-AP

Mouser Part No
650-RXEF025-AP

Littelfuse

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

Learn More

Datasheet

Product Comments

Non-Stocked Lead-Time 17 Weeks

Cut Tape

£0.375

£0.346

£0.287

£0.261

View

Reel

£0.161

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: £0.943
Non-Stocked Lead-Time 17 Weeks

Mfr. Part No.
RXEF375-1

Mouser Part No
650-RXEF375-1

Littelfuse

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

Learn More

Datasheet

Product Comments

Non-Stocked Lead-Time 17 Weeks

£0.943

£0.871

£0.721

£0.665

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: £0.601
Non-Stocked Lead-Time 17 Weeks

Mfr. Part No.
TRF250-120T-R1-B-0.5

Mouser Part No
650-TRF250120TR1B0.5

Littelfuse

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

Learn More

Datasheet

Non-Stocked Lead-Time 17 Weeks

£0.601

£0.552

£0.458

£0.423

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: £0.713
Non-Stocked

Mfr. Part No.
MF-R090-0-003

Mouser Part No
652-MF-R090-0-003

Bourns

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

Learn More

Datasheet

Non-Stocked

£0.713

£0.542

£0.508

£0.384

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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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