4 A Fuses 1,332

Reset All
Part RoHS Manufacturer Circuit Protection Type Mounting Feature Rated AC Voltage Rated DC Voltage Rated Current Terminal Shape Nominal Joule Integral Minimum Operating Temperature Terminal Finish Rated Breaking Capacity Manufacturer Series Trip Time/Delay Additional Features Pre Arcing Rating (A2/s) Packing Method Body Length/Diameter Body Width Fuse Class JESD-609 Code Rated Voltage Resistance Minimum Pre Arcing Time Fuse Size Built-in Features Dimensions Body Height Reference Standard Maximum Operating Temperature Blow Characteristic

0251004

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

2.45 J

-55 °C (-67 °F)

Tin Lead

50 A

Rated Breaking Capacity at 125 VDC: 300 A

2.45

0.095 in (2.41 mm)

e0

125 V

Pico

0.095 x 0.28 in (2.41 x 7.11 mm)

0.28 in (7.11 mm)

CSA; METI; PSE; UL

125 °C (257 °F)

Very Fast

0514004.MXEP

Littelfuse

Electric Fuse

Through Hole Mount

500 V

4 A

Pin Wire

12.43 J

-55 °C (-67 °F)

5 kA

2 m

Bulk

0.275 in (6.985 mm)

3AB

1.288 in (32.72 mm)

125 °C (257 °F)

Fast

0233004XW

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

53 J

233

0.207 in (5.25 mm)

0.207 x 0.886 in (5.25 x 22.5 mm)

0.886 in (22.5 mm)

CSA; MITI; UL

Medium

0477004.MXEP

Littelfuse

Electric Fuse

Through Hole Mount

500 V

400 V

4 A

Pin Wire

52.48 J

-55 °C (-67 °F)

100 A

10 ms

Rated Breaking Capacity at 400 VDC: 500 A

Bulk

0.217 in (5.5 mm)

0.197 x 0.787 in (5 x 20 mm)

0.228 x 0.886 in (5.8 x 22.5 mm)

0.846 in (21.5 mm)

PSE

125 °C (257 °F)

Time Lag

04534.00NRL

Littelfuse

Electric Fuse

Surface Mount

125 V

125 V

4 A

Wraparound

3.152 J

-55 °C (-67 °F)

Silver

50 A

Tape And Reel

0.24 in (6.1 mm)

0.106 in (2.69 mm)

e4

0.24 x 0.106 x 0.106 in (6.1 x 2.69 x 2.69 mm)

0.106 in (2.69 mm)

CSA; PSE; UL

125 °C (257 °F)

Very Fast

R451004

Littelfuse

Electric Fuse

Surface Mount

125 V

125 V

4 A

Wraparound

3.152 J

Tin/Lead

50 A

e0

CSA; UL

Very Fast

0218004.MXEP

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

69.1 J

-55 °C (-67 °F)

Matte Tin

40 A

20 ms

69.1

Bulk

0.217 in (5.5 mm)

Supplemental

e3

250 V

0.197 x 0.787 in (5 x 20 mm)

0.228 x 0.886 in (5.8 x 22.5 mm)

0.846 in (21.5 mm)

CCC; CE; CSA; KC; PSE; SEMKO; SEV; UL; VDE

125 °C (257 °F)

Time Lag

0230004.MXF16P

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

148 J

-55 °C (-67 °F)

Matte Tin

400 A

Bulk

0.185 in (4.7 mm)

e3

0.185 x 0.57 in (4.7 x 14.48 mm)

0.57 in (14.48 mm)

CE; CSA; PSE; UL

125 °C (257 °F)

Time Lag

592004S

Littelfuse

Electric Fuse

Inline/Holder

500 V

500 V

4 A

End Cap

Silver

592

e4

0451004.MRSN

Littelfuse

Electric Fuse

Surface Mount

125 V

125 V

4 A

Wraparound

3.152 J

-55 °C (-67 °F)

50 A

5 s

Tape And Reel

0.24 in (6.1 mm)

0.106 in (2.69 mm)

125 V

Nano

0.24 x 0.106 x 0.106 in (6.1 x 2.69 x 2.69 mm)

0.106 in (2.69 mm)

CE; CSA; CUL; PSE; TUV; UL

125 °C (257 °F)

Very Fast

0465004.DR

Littelfuse

Electric Fuse

Surface Mount

250 V

4 A

Wraparound

48.4 J

-55 °C (-67 °F)

Silver

100 A

10 ms

48.4

Tape And Reel

0.476 in (12.1 mm)

0.177 in (4.5 mm)

e4

250 V

Nano

0.476 x 0.177 x 0.177 in (12.1 x 4.5 x 4.5 mm)

0.177 in (4.5 mm)

CE; CUL; PSE; UKCA; UL

125 °C (257 °F)

Time Lag

3401400000

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

30 J

-25 °C (-13 °F)

100 A

Bulk

0.248 in (6.3 mm)

120 s

0.248 x 1.26 in (6.3 x 32 mm)

1.26 in (32 mm)

CSA; UL

70 °C (158 °F)

Very Fast

318004

Littelfuse

Electric Fuse

Through Hole Mount

250 V

250 V

4 A

Pin Wire

28.5 J

Tin Lead

35 A

0.276 in (7 mm)

e0

0.276 x 1.275 in (7 x 32.39 mm)

1.275 in (32.39 mm)

CSA; UL

Fast

0251004T1L

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

2.45 J

-55 °C (-67 °F)

Matte Tin

50 A

0251

Rated Breaking Capacity at 125 VDC: 300 A

Tape And Reel

0.11 in (2.8 mm)

e3

0.11 x 0.28 in (2.8 x 7.11 mm)

0.28 in (7.11 mm)

CSA; METI; PSE; UL

125 °C (257 °F)

Very Fast

0603SFS400F/32

Littelfuse

Electric Fuse

Surface Mount

32 V

4 A

End Cap

2.3 J

-55 °C (-67 °F)

Tin Over Nickel

50 A

Rated Breaking Capacity at 32 VDC: 40 A

0.069 in (1.75 mm)

0.037 in (0.95 mm)

e3

0.069 x 0.037 x 0.037 in (1.75 x 0.95 x 0.95 mm)

0.037 in (0.95 mm)

UL

125 °C (257 °F)

Slow

0253004T1L

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

2.45 J

-55 °C (-67 °F)

Pure Tin

50 A

0253

Rated Breaking Capacity at 125 VDC: 300 A

Tape And Reel

0.11 in (2.8 mm)

0.11 x 0.28 in (2.8 x 7.11 mm)

0.28 in (7.11 mm)

CSA; METI; PSE; QPL; UL

125 °C (257 °F)

Very Fast

0263004.MXT1L

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

3.08 J

-55 °C (-67 °F)

Pure Tin

50 A

Bulk

0.155 in (3.94 mm)

0.155 x 0.28 in (3.94 x 7.11 mm)

0.28 in (7.11 mm)

CSA; PSE; UL

125 °C (257 °F)

Very Fast

0263004.WRT1HF

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

3.08 J

-55 °C (-67 °F)

Pure Tin

50 A

Tape And Reel

0.155 in (3.94 mm)

0.155 x 0.28 in (3.94 x 7.11 mm)

0.28 in (7.11 mm)

CSA; PSE; UL

125 °C (257 °F)

Very Fast

0434004

Littelfuse

Electric Fuse

Surface Mount

32 V

32 V

4 A

Wraparound

352 mJ

-55 °C (-67 °F)

Tin/Lead with Nickel barrier

35 A

434

Rated Breaking Capacity at 32 VDC: 35 A

0.063 in (1.6 mm)

0.032 in (0.81 mm)

e0

0.063 x 0.032 x 0.012 in (1.6 x 0.81 x 0.31 mm)

0.012 in (0.31 mm)

CSA; UL

90 °C (194 °F)

Very Fast

142.6185.4402

Littelfuse

Electric Fuse

Inline/Holder

58 V

4 A

Tab/Blade

25 J

Tin

Rated Breaking Capacity at 58 VDC: 1000 A

0.748 in (19 mm)

0.197 in (5 mm)

e3

0.748 x 0.197 x 0.52 in (19 x 5 x 13.2 mm)

0.52 in (13.2 mm)

UL

0473004.PRT1HF

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

35 J

-55 °C (-67 °F)

Pure Tin

50 A

Tape And Reel

0.135 in (3.43 mm)

0.135 x 0.28 in (3.43 x 7.11 mm)

0.28 in (7.11 mm)

CSA; PSE; UL

125 °C (257 °F)

Time Lag

0278004.H

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

1.38 J

-55 °C (-67 °F)

Tin

10 kA

4 h

Bulk

0.235 in (5.97 mm)

e3

125 V

Micro

0.235 x 0.287 in (5.97 x 7.3 mm)

0.287 in (7.3 mm)

CSA; QPL; UL

125 °C (257 °F)

Very Fast

0272004.0H

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

1.38 J

-55 °C (-67 °F)

10 kA

2 s

Bulk

0.235 in (5.97 mm)

125 V

Micro

0.287 in (7.3 mm)

CSA; QPL; UL

125 °C (257 °F)

Very Fast

0225004.MXUP

Littelfuse

Electric Fuse

Inline/Holder

125 V

125 V

4 A

End Cap

9.4 J

-55 °C (-67 °F)

Nickel

500 A

4 h

9.4

Bulk

0.177 in (4.5 mm)

125 V

2AG

0.177 x 0.57 in (4.5 x 14.48 mm)

0.57 in (14.48 mm)

CE; CSA; PSE; UL

125 °C (257 °F)

Fast

0309607H

Littelfuse

Electric Fuse

Inline/Holder

32 V

32 V

4 A

End Cap

Bulk

0.25 in (6.35 mm)

32 V

0.625 in (15.87 mm)

Normal

0253004.PR

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

2.45 J

-55 °C (-67 °F)

50 A

4 ms

Rated Breaking Capacity at 125 VDC: 300 A

Tape And Reel

0.11 in (2.8 mm)

125 V

Pico

0.28 in (7.11 mm)

CCC; CSA; CUL; PSE; TUV; QPL; UL

125 °C (257 °F)

Very Fast

0251004.HRT1HF

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

2.45 J

-55 °C (-67 °F)

Matte Tin

50 A

251

Rated Breaking Capacity at 125 VDC: 300 A

Tape And Reel

0.11 in (2.8 mm)

e3

0.11 x 0.28 in (2.8 x 7.11 mm)

0.28 in (7.11 mm)

CCC; CSA; PSE; QPL; TUV; UL

125 °C (257 °F)

Very Fast

0481004.HM

Littelfuse

Electric Fuse

Inline/Holder

125 V

125 V

4 A

End Cap

36 J

-55 °C (-67 °F)

300 A

5 m

0.701 in (17.8 mm)

0.228 in (5.8 mm)

125 V

Alarm; Indicator

0.772 in (19.6 mm)

CSA; UL

125 °C (257 °F)

Fast

0318004HX

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

28.5 J

-55 °C (-67 °F)

Tin

200 A

318

Bulk

0.275 in (6.99 mm)

e3

0.275 x 1.288 in (6.99 x 32.72 mm)

1.288 in (32.72 mm)

CE; CSA; KTL; PSE; UL

125 °C (257 °F)

Fast

256004

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

5 s

0.095 in (2.41 mm)

125 V

Pico

0.095 x 0.28 in (2.41 x 7.11 mm)

0.28 in (7.11 mm)

Fast

0473004.PAT1HF

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

35 J

-55 °C (-67 °F)

Pure Tin

50 A

Ammo Pack

0.135 in (3.43 mm)

0.135 x 0.28 in (3.43 x 7.11 mm)

0.28 in (7.11 mm)

CSA; PSE; UL

125 °C (257 °F)

Time Lag

R452004.NR

Littelfuse

Electric Fuse

Surface Mount

125 V

125 V

4 A

End Cap

34.4 J

-55 °C (-67 °F)

Tin Lead

50 A

452

Rated Breaking Capacity at 125 VDC: 50 A

Tape And Reel

0.24 in (6.1 mm)

0.106 in (2.69 mm)

e0

0.24 x 0.106 x 0.106 in (6.1 x 2.69 x 2.69 mm)

0.106 in (2.69 mm)

CSA; UL

125 °C (257 °F)

Slow

L25S004

Littelfuse

Electric Fuse

Inline/Holder

250 V

250 V

4 A

End Cap

200 kA

Rated Breaking Capacity at 250 VDC: 20000 A

0.563 in (14.3 mm)

2 in (50.8 mm)

CE; CSA; UL

Very Fast

3721400041

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

95 J

-40 °C (-40 °F)

Matte Tin

40 A

95

Bulk

0.335 in (8.5 mm)

e3

250 V

12.9 mΩ

20 ms

TR5

0.335 x 0.315 in (8.5 x 8 mm)

0.315 in (8 mm)

CCC; KTL; PSE; SEMKO; UL; VDE

85 °C (185 °F)

Time Lag

0253004TL

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

2.45 J

-55 °C (-67 °F)

Pure Tin

50 A

Rated Breaking Capacity at 125 VDC: 300 A

Tape And Reel

0.095 in (2.41 mm)

0.095 x 0.28 in (2.41 x 7.11 mm)

0.28 in (7.11 mm)

CSA; METI; PSE; QPL; UL

125 °C (257 °F)

Very Fast

0447004.ZR

Littelfuse

Electric Fuse

Through Hole Mount

350 V

4 A

Pin Wire

17 J

-40 °C (-40 °F)

Tin Lead

100 A

447

Bulk

e0

CSA; METI; UL

125 °C (257 °F)

Fast

0332004.MXP

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

3.36 J

-55 °C (-67 °F)

100 A

200 ms

Rated Breaking Capacity at 125 VDC: 100 A

3.36

Bulk

0.25 in (6.35 mm)

250 V

3AB

0.25 x 1.25 in (6.35 x 31.75 mm)

1.25 in (31.75 mm)

CE; CUL; PSE; UL

125 °C (257 °F)

Very Fast

2301400002

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

1.6 J

-25 °C (-13 °F)

Nickel

1 kA

Bulk

0.205 in (5.2 mm)

250 V

1 ms

0.197 x 0.787 in (5 x 20 mm)

0.205 x 0.787 in (5.2 x 20 mm)

0.787 in (20 mm)

70 °C (158 °F)

Very Fast

0232004.MX125P

Littelfuse

Electric Fuse

Inline/Holder

125 V

4 A

End Cap

37.73 J

-60 °C (-76 °F)

Nickel

10 kA

2 m

Pre Arcing Time: Open within 2 m at 200% Rated Current

Bulk

0.205 in (5.2 mm)

0.197 x 0.787 in (5 x 20 mm)

0.205 x 0.787 in (5.2 x 20 mm)

0.787 in (20 mm)

CE; KC; PSE

125 °C (257 °F)

Medium

274004

Littelfuse

Electric Fuse

Inline/Holder

125 V

125 V

4 A

Tab/Blade

1.38 J

-55 °C (-67 °F)

10 kA

Rated Breaking Capacity at 125 VDC: 10000 A

0.25 in (6.35 mm)

0.25 x 0.35 in (6.35 x 8.89 mm)

0.35 in (8.89 mm)

CSA; QPL; UL

85 °C (185 °F)

Very Fast

1961400043

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

54 J

-25 °C (-13 °F)

150 A

Tape And Reel

0.213 in (5.4 mm)

20 ms

0.197 x 0.787 in (5 x 20 mm)

0.827 in (21 mm)

BSI; CUL; IEC; SEMKO; UL; VDE

70 °C (158 °F)

Time Lag

0253004.HR

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

2.45 J

-55 °C (-67 °F)

50 A

4 ms

Rated Breaking Capacity at 125 VDC: 300 A

Tape And Reel

0.11 in (2.8 mm)

125 V

Pico

0.28 in (7.11 mm)

CCC; CSA; CUL; PSE; TUV; QPL; UL

125 °C (257 °F)

Very Fast

FLM004.

Littelfuse

Electric Fuse

4 A

End Cap

10 kA

0.406 in (10.3 mm)

250 V

Midget

0.406 x 1.5 in (10.3 x 38.1 mm)

1.5 in (38.1 mm)

CSA, UL

Time Lag

203004.H

Littelfuse

Electric Fuse

4 A

-55 °C (-67 °F)

50 A

4 h

8.8

0.372 in (9.45 mm)

0.25 in (6.35 mm)

250 V

14.8 mΩ

0.372 x 0.25 x 0.165 in (9.45 x 6.35 x 4.19 mm)

0.165 in (4.19 mm)

CSA; UL

125 °C (257 °F)

Time Lag

35614000029

Littelfuse

Electric Fuse

Inline/Holder

440 V

4 A

End Cap

62 J

-25 °C (-13 °F)

Matte Tin

1 kA

10 ms

Pre Arcing Time: Open within 0.01 s at 1000% Rated Current

Bulk

0.25 in (6.35 mm)

e3

3AB

0.248 x 1.26 in (6.3 x 32 mm)

1.25 in (31.75 mm)

CE; CUL; UL

70 °C (158 °F)

Slow

1931400040

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

21 J

-25 °C (-13 °F)

40 A

Bulk

0.213 in (5.4 mm)

20 ms

0.197 x 0.787 in (5 x 20 mm)

0.827 in (21 mm)

CUL; DIN; IEC; SEMKO; VDE; UL

70 °C (158 °F)

Very Fast

1951400000

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

42 J

-25 °C (-13 °F)

40 A

Bulk

0.205 in (5.2 mm)

250 V

20 ms

0.197 x 0.787 in (5 x 20 mm)

0.205 x 0.787 in (5.2 x 20 mm)

0.787 in (20 mm)

BSI, CCEE, IMQ, MITI, SEMKO, UL, VDE

70 °C (158 °F)

Time Lag

FLQ004.T

Littelfuse

Electric Fuse

Inline/Holder

500 V

300 V

4 A

End Cap

-55 °C (-67 °F)

10 kA

0.406 in (10.31 mm)

500 V

Midget

0.406 x 1.5 in (10.31 x 38.1 mm)

1.5 in (38.1 mm)

CSA, UL

125 °C (257 °F)

Time Lag

Fuses

A fuse is an electrical safety device that is designed to protect an electrical circuit from damage caused by overcurrent. Fuses are commonly used in residential, commercial, and industrial electrical systems, and they are an important safety device that helps prevent electrical fires, equipment damage, and personal injury.

A fuse typically consists of a metal wire or filament that is enclosed in a fuse body, which is designed to protect the wire from damage. The fuse is connected in series with the electrical circuit, and when the current flowing through the circuit exceeds a preset level, the wire in the fuse will melt or blow, which opens the circuit and prevents further damage to the electrical system.

Fuses are available in a variety of types and sizes, and they can be classified based on their current rating, voltage rating, and speed of operation. Some common types of fuses include cartridge fuses, blade fuses, and plug fuses.

In addition to protecting electrical systems from overcurrent, fuses can also be used to protect electrical equipment and machinery from damage caused by short circuits or other types of electrical faults. They are a cost-effective and reliable method of electrical protection, and they are widely used in a variety of electrical applications.