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

0253004.MRT1

Littelfuse

Electric Fuse

4 A

Pin Wire

-55 °C (-67 °F)

300 A

2.45

Tape And Reel

0.103 in (2.61 mm)

Supplemental

125 V

Pico

0.103 x 0.28 in (2.61 x 7.11 mm)

0.28 in (7.11 mm)

CCC, CSA, PSE, TUV, UL

125 °C (257 °F)

Very Fast

BLF004

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

10 kA

2 m

Bulk

0.406 in (10.31 mm)

250 V

5AG

0.406 x 1.5 in (10.31 x 38.1 mm)

1.5 in (38.1 mm)

CE; CSA; UL

Fast

0253004.MR

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

MIN4

Littelfuse

Electric Fuse

Inline/Holder

32 V

4 A

Tab/Blade

17 J

-40 °C (-40 °F)

1 kA

30 ms

Box

0.429 in (10.9 mm)

0.15 in (3.8 mm)

0.346 in (8.8 mm)

UL

125 °C (257 °F)

FLM004

Littelfuse

Electric Fuse

Inline/Holder

250 V

125 V

4 A

End Cap

10 kA

12 s

Pre Arcing Time: Open within 12 s at 200% Rated Current

Bulk

0.406 in (10.31 mm)

250 V

0.394 x 1.496 in (10 x 38 mm)

0.406 x 1.5 in (10.3 x 38.1 mm)

1.5 in (38.1 mm)

CE; CSA; QPL; UL

Time Delay

0216004MXSPP

Littelfuse

Electric Fuse

Through Hole Mount

250 V

250 V

4 A

Pin Wire

14.995 J

-55 °C (-67 °F)

1.5 kA

Bulk

0.205 in (5.2 mm)

0.205 x 0.787 in (5.2 x 20 mm)

0.787 in (20 mm)

CE; CSA; CQC; IEC; KC; PSE; VDE; UL

125 °C (257 °F)

Fast

FLSR004

Littelfuse

Electric Fuse

Inline/Holder

600 V

300 V

4 A

200 kA

FLSR

Rated Breaking Capacity at 300 VDC: 20000 A

0.811 in (20.6 mm)

5 in (127 mm)

CSA; UL

Time Delay

0SPF004.T

Littelfuse

Electric Fuse

Inline/Holder

1 KV

4 A

End Cap

23 J

20 kA

4 m

Bulk

0.406 in (10.31 mm)

0.394 x 1.496 in (10 x 38 mm)

0.406 x 1.5 in (10.31 x 38.1 mm)

1.5 in (38.1 mm)

CSA; TUV; UL

Fast

0253004.NAT3

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

2.45 J

-55 °C (-67 °F)

Tin

50 A

4 ms

Rated Breaking Capacity at 125 VDC: 300 A, Pre Arcing Time: Open within 4 ms at 1000% Rated Current

Ammo Pack

0.11 in (2.8 mm)

e3

Pico

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

322004P

Littelfuse

Electric Fuse

Inline/Holder

250 V

65 V

4 A

End Cap

100 A

322P

0.25 in (6.35 mm)

0.25 x 1.25 in (6.35 x 31.75 mm)

1.25 in (31.75 mm)

UL

Very Fast

3264MVXP

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

9.71 J

-55 °C (-67 °F)

Matte Tin

400 A

Bulk

0.25 in (6.35 mm)

e3

0.25 x 1.25 in (6.35 x 31.75 mm)

1.25 in (31.75 mm)

CE; CSA; PSE; UL

125 °C (257 °F)

Time Lag

0230004.MXF23P

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

FLA4

Littelfuse

Electric Fuse

Inline/Holder

125 V

4 A

End Cap

10 kA

0.406 in (10.31 mm)

Indicator

0.406 x 1.5 in (10.31 x 38.1 mm)

1.5 in (38.1 mm)

UL

Slow

0253004.HXL

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

2.45 J

-55 °C (-67 °F)

Tin

50 A

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

0232004

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

38.75 J

-55 °C (-67 °F)

Nickel

100 A

Bulk; Tape And Reel

0.205 in (5.2 mm)

0.205 x 0.787 in (5.2 x 20 mm)

0.787 in (20 mm)

KTL; METI; PSE

125 °C (257 °F)

Medium

0216004MXESPP

Littelfuse

Electric Fuse

Through Hole Mount

250 V

250 V

4 A

Pin Wire

14.995 J

-55 °C (-67 °F)

1.5 kA

Bulk

0.205 in (5.2 mm)

0.205 x 0.787 in (5.2 x 20 mm)

0.787 in (20 mm)

CE; CSA; CQC; IEC; KC; PSE; VDE; UL

125 °C (257 °F)

Fast

40014000075

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

133.4 J

-40 °C (-40 °F)

Tin

130 A

20 ms

Bulk

0.335 in (8.5 mm)

0.157 in (4 mm)

e3

TE5

0.335 x 0.157 x 0.315 in (8.5 x 4 x 8 mm)

0.315 in (8 mm)

IEC; PSE; UL

125 °C (257 °F)

Time Lag

0233004.MXBP

Littelfuse

Electric Fuse

Inline/Holder

125 V

4 A

End Cap

51.61 J

-55 °C (-67 °F)

Nickel

10 kA

Bulk

0.205 in (5.2 mm)

0.205 x 0.787 in (5.2 x 20 mm)

0.787 in (20 mm)

CE; CSA; KC; PSE; UL

125 °C (257 °F)

Medium

0274004.0H

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Wire

1.38 J

-55 °C (-67 °F)

10 kA

2 s

Bulk

0.25 in (6.35 mm)

125 V

Micro

0.35 in (8.89 mm)

CSA; QPL; UL

85 °C (185 °F)

Very Fast

0253004.VAL

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

Ammo Pack

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

0SPF004.TXS

Littelfuse

Electric Fuse

Inline/Holder

1 KV

4 A

End Cap

23 J

Silver

20 kA

4 m

Bulk

0.406 in (10.31 mm)

e4

0.394 x 1.496 in (10 x 38 mm)

1.5 in (38.1 mm)

CE; CSA; IEC; UL

0446004.

Littelfuse

Electric Fuse

Surface Mount

350 V

125 V

4 A

Gull Wing

17 J

-40 °C (-40 °F)

Tin

100 A

Rated Breaking Capacity at 125 VDC: 50 A

Tape And Reel

0.43 in (10.92 mm)

0.345 in (8.76 mm)

e3

0.43 x 0.345 x 0.15 in (10.92 x 8.76 x 3.81 mm)

0.15 in (3.81 mm)

CSA; METI; PSE; UL

125 °C (257 °F)

Fast

1931400000

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

21 J

-25 °C (-13 °F)

40 A

Bulk

0.205 in (5.2 mm)

20 ms

0.197 x 0.787 in (5 x 20 mm)

0.787 in (20 mm)

CUL; DIN; IEC; SEMKO; VDE; UL

70 °C (158 °F)

Very Fast

2401400002

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

21 J

-25 °C (-13 °F)

Nickel

1.5 kA

Bulk

0.205 in (5.2 mm)

250 V

20 ms

Indicator

0.205 x 0.984 in (5.2 x 25 mm)

0.984 in (25 mm)

70 °C (158 °F)

Fast

0251004.NRHF

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

0459004

Littelfuse

Electric Fuse

Surface Mount

125 V

125 V

4 A

Wraparound

2.35 J

-55 °C (-67 °F)

Tin

50 A

Rated Breaking Capacity at 125 VDC: 300 A

Tape And Reel

0.285 in (7.24 mm)

0.17 in (4.32 mm)

e3

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

040014000000

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

133.4 J

-40 °C (-40 °F)

Tin

130 A

20 ms

Ammo Pack; Tape

0.335 in (8.5 mm)

0.157 in (4 mm)

e3

TE5

0.315 in (8 mm)

CQC; CUL; KTL; PSE; UL; VDE

85 °C (185 °F)

Time Lag

0217004.MRET1P

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

29.165 J

-55 °C (-67 °F)

40 A

10 ms

Tape And Reel

0.205 in (5.2 mm)

0.197 x 0.787 in (5 x 20 mm)

0.787 in (20 mm)

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

125 °C (257 °F)

Very Fast

1961400000

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

54 J

-25 °C (-13 °F)

150 A

Bulk

0.205 in (5.2 mm)

20 ms

0.197 x 0.787 in (5 x 20 mm)

0.787 in (20 mm)

BSI; CUL; IEC; SEMKO; UL; VDE

70 °C (158 °F)

Time Lag

0362004.M

Littelfuse

Electric Fuse

Inline/Holder

32 V

32 V

4 A

End Cap

Bulk

0.25 in (6.35 mm)

32 V

8AG

1 in (25.4 mm)

Normal

BLF004.

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

10 kA

0.406 in (10.31 mm)

0.406 x 1.5 in (10.31 x 38.1 mm)

1.5 in (38.1 mm)

CSA; UL

Fast

1811400000

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

77.9 J

-40 °C (-40 °F)

Tin

1.5 kA

181

Bulk

0.205 in (5.2 mm)

e3

20 ms

0.205 x 0.787 in (5.2 x 20 mm)

0.787 in (20 mm)

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

85 °C (185 °F)

Time Lag

KLK004

Littelfuse

Electric Fuse

Inline/Holder

600 V

500 V

4 A

End Cap

100 kA

Rated Breaking Capacity at 500 VDC: 50000 A

0.406 in (10.31 mm)

600 V

0.394 x 1.496 in (10 x 38 mm)

0.406 x 1.5 in (10.3 x 38.1 mm)

1.5 in (38.1 mm)

CSA; UL

Fast

0673004DRT4

Littelfuse

Electric Fuse

4 A

Pin Wire

50 A

4 h

28.6

0.154 in (3.9 mm)

250 V

0.154 x 0.433 in (3.9 x 11 mm)

0.433 in (11 mm)

CSA, UL

Time Lag

3031400042

Littelfuse

Electric Fuse

Through Hole Mount

125 V

63 V

4 A

Pin Wire

1 J

-25 °C (-13 °F)

Matte Tin

50 A

Rated Breaking Capacity at 63 VDC: 50 A

1

Bulk

0.236 in (6 mm)

Supplemental

e3

125 V

5 s

Micro

0.236 x 0.315 in (6 x 8 mm)

0.315 in (8 mm)

CSA; UL

70 °C (158 °F)

Fast

0441004.WR

Littelfuse

Electric Fuse

Surface Mount

32 V

4 A

Wraparound

1.266 J

-55 °C (-67 °F)

Matte Tin Over Nickel

50 A

1.3

Tape And Reel

0.061 in (1.54 mm)

0.033 in (0.85 mm)

e3

32 V

9.8 mΩ

0603

0.061 x 0.033 x 0.02 in (1.54 x 0.85 x 0.5 mm)

0.02 in (0.5 mm)

CSA; UL

150 °C (302 °F)

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.