4 A Fuses 1,332

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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

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

CY14X51M4

Littelfuse

Electric Fuse

Inline/Holder

690 V

4 A

End Cap

80 kA

0.551 in (14 mm)

690 V

0.551 x 2.008 in (14 x 51 mm)

0.551 x 2.008 in (14 x 51 mm)

2.008 in (51 mm)

IEC

Time Lag

162.7049.4402

Littelfuse

Electric Fuse

Inline/Holder

90 V

90 V

4 A

Tab/Blade

100 J

162

Bulk

0.748 in (19 mm)

0.197 in (5 mm)

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

0.52 in (13.2 mm)

UL

0253004.MXT3L

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

253

Rated Breaking Capacity at 125 VDC: 300 A

Bulk

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; PSE; QPL; TUV; UL

125 °C (257 °F)

Very Fast

0481004.HXMP

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

0453004

Littelfuse

Electric Fuse

Surface Mount

125 V

125 V

4 A

Wraparound

3.152 J

-55 °C (-67 °F)

Silver

50 A

5 s

Rated Breaking Capacity at 32 VDC: 300 A

Tape And Reel

0.24 in (6.1 mm)

0.106 in (2.69 mm)

e4

Nano

0.106 in (2.69 mm)

CSA; METI; PSE; UL

125 °C (257 °F)

Very Fast

SPXC004.L

Littelfuse

Electric Fuse

Inline/Holder

1.5 KV

4 A

End Cap

56 J

15 kA

4 m

Bulk

0.406 in (10.31 mm)

0.394 x 2.244 in (10 x 57 mm)

2.252 in (57.2 mm)

CE; UL

Fast

0507004.MXP

Littelfuse

Electric Fuse

Inline/Holder

650 V

4 A

End Cap

8 J

-55 °C (-67 °F)

150 A

2 m

Bulk

0.25 in (6.35 mm)

3AB

1.25 in (31.75 mm)

CE; CUL; UL

125 °C (257 °F)

0473004

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

35 J

-55 °C (-67 °F)

Tin Lead

50 A

0.125 in (3.18 mm)

e0

0.125 x 0.28 in (3.18 x 7.11 mm)

0.28 in (7.11 mm)

CSA; METI; PSE; UL

125 °C (257 °F)

Slow

0454004.NRSN

Littelfuse

Electric Fuse

Surface Mount

125 V

125 V

4 A

Wraparound

34.4 J

-55 °C (-67 °F)

50 A

2 ms

Tape And Reel

0.24 in (6.1 mm)

0.106 in (2.69 mm)

125 V

Nano

0.106 in (2.69 mm)

CSA; CUL; UL

125 °C (257 °F)

Slow

JTD004ID

Littelfuse

Electric Fuse

Inline/Holder

600 V

300 V

4 A

End Cap

200 kA

Rated Breaking Capacity at 300 VDC: 20000 A

Bulk

0.811 in (20.6 mm)

Indicator

0.811 x 2.252 in (20.6 x 57.2 mm)

2.252 in (57.2 mm)

CSA; UL

Time Delay

0253004.MXL

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

2.45 J

-55 °C (-67 °F)

Tin

50 A

0253

Rated Breaking Capacity at 125 VDC: 300 A

Bulk

0.103 in (2.61 mm)

e3

0.103 x 0.28 in (2.61 x 7.11 mm)

0.28 in (7.11 mm)

CCC; CSA; PSE; QPL; TUV; UL

125 °C (257 °F)

Very Fast

313004P

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

76.1 J

Matte Tin

200 A

4 h

0.25 in (6.35 mm)

e3

250 V

30.8 mΩ

3AB

0.25 x 1.25 in (6.35 x 31.75 mm)

1.25 in (31.75 mm)

CE; CSA; METI; PSE; UL

Slow

255004

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

Tin Lead Over Copper

Tape And Reel

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)

UL

Fast

0251004.MRT1HF

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

0325004.HXP

Littelfuse

Electric Fuse

Through Hole Mount

250 V

250 V

4 A

Pin Wire

9.71 J

-55 °C (-67 °F)

Tin

400 A

4 h

9.71

Bulk

0.275 in (6.99 mm)

e3

250 V

3AB

0.275 x 1.288 in (6.99 x 32.72 mm)

1.288 in (32.72 mm)

CE; CSA; PSE; UL

125 °C (257 °F)

Time Lag

IDSR004.T

Littelfuse

Electric Fuse

Inline/Holder

600 V

600 V

4 A

End Cap

200 kA

Rated Breaking Capacity at 600 VDC: 20000 A

Bulk

0.815 in (20.7 mm)

5 in (127 mm)

CSA; UL

Time Delay

1811400043

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

77.9 J

-40 °C (-40 °F)

Tin

1.5 kA

181

Tape And Reel

0.232 in (5.9 mm)

e3

20 ms

0.232 x 0.827 in (5.9 x 21 mm)

0.827 in (21 mm)

BSI; CCC; CUL; IEC; METI; PSE; SEMKO; SEV; UL; VDE

85 °C (185 °F)

Time Lag

1206SFF400F/32

Littelfuse

Electric Fuse

Surface Mount

32 V

4 A

Wraparound

-55 °C (-67 °F)

Tin with Nickel barrier

45 A

4 h

Rated Breaking Capacity at 32 VDC: 45 A

0.38

0.126 in (3.2 mm)

0.063 in (1.6 mm)

e3

32 V

0.126 x 0.063 x 0.043 in (3.2 x 1.6 x 1.1 mm)

0.043 in (1.1 mm)

UL

125 °C (257 °F)

Fast

D36878-000

Littelfuse

Electric Fuse

Surface Mount

32 V

4 A

Wraparound

35 A

UL

125 °C (257 °F)

Fast

KLC004

Littelfuse

Electric Fuse

Inline/Holder

600 V

4 A

Tab/Blade

-55 °C (-67 °F)

200 kA

0.563 in (14.3 mm)

1.874 in (47.6 mm)

CSA; UL

125 °C (257 °F)

Very Fast

269004

Littelfuse

Electric Fuse

Inline/Holder

125 V

125 V

4 A

Tab/Blade

-55 °C (-67 °F)

Gold

10 kA

Rated Breaking Capacity at 125 VDC: 10000 A

0.235 in (5.97 mm)

e4

0.235 x 0.29 in (5.97 x 7.37 mm)

0.29 in (7.37 mm)

CSA; QPL; UL

125 °C (257 °F)

Very Fast

RLS004

Littelfuse

Electric Fuse

Inline/Holder

600 V

4 A

End Cap

10 kA

0.811 in (20.6 mm)

5 in (127 mm)

CE; CSA; UL

459004

Littelfuse

Electric Fuse

Surface Mount

125 V

125 V

4 A

J Bend

2.35 J

-55 °C (-67 °F)

Matte Tin

50 A

100 ms

Rated Breaking Capacity at 125VDC: 300 A

2.3

0.285 in (7.24 mm)

0.17 in (4.32 mm)

e3

125 V

Pico

0.285 x 0.17 x 0.12 in (7.24 x 4.32 x 3.05 mm)

0.12 in (3.05 mm)

CSA, UL

125 °C (257 °F)

Very Fast

0234004.MRET1P

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

10.37 J

-55 °C (-67 °F)

Tin

200 A

4 h

Pre Arcing Time: OPEN within 400 MS at 200% RATED CURRENT

10.37

Tape And Reel

0.217 in (5.5 mm)

e3

250 V

0.197 x 0.787 in (5 x 20 mm)

0.217 x 0.846 in (5.5 x 21.5 mm)

0.846 in (21.5 mm)

CE; CSA; KTL; PSE; UL

125 °C (257 °F)

Medium

0479004.MXEP

Littelfuse

Electric Fuse

4 A

Pin Wire

20 A

Tape And Reel

0.184 in (4.67 mm)

600 V

2AG

0.184 x 0.586 in (4.67 x 14.88 mm)

0.586 in (14.88 mm)

CE, UL

Fast

0251004T1

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

0251

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; UL

125 °C (257 °F)

Very Fast

37214000511

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

126.4 J

-40 °C (-40 °F)

Matte Tin

40 A

20 ms

95

Bulk

0.335 in (8.5 mm)

e3

250 V

TR5

0.335 x 0.315 in (8.5 x 8 mm)

0.315 in (8 mm)

CCC; CE; CUL; KC; PSE; UL; VDE

85 °C (185 °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.