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

0229004.MXSP

Littelfuse

Electric Fuse

Inline/Holder

125 V

125 V

4 A

End Cap

148 J

-55 °C (-67 °F)

Matte Tin

400 A

Bulk

0.177 in (4.5 mm)

e3

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)

Time Lag

0465004.

Littelfuse

Electric Fuse

Surface Mount

250 V

4 A

End Cap

48.4 J

-55 °C (-67 °F)

Silver

100 A

Joule Integral Nom at Rated Voltage(DC): 48.4

Tape And Reel

0.476 in (12.1 mm)

0.177 in (4.5 mm)

e4

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

0.177 in (4.5 mm)

METI; PSE; UL

125 °C (257 °F)

Time Lag

KLKD004.

Littelfuse

Electric Fuse

Inline/Holder

600 V

600 V

4 A

End Cap

100 kA

KLKD

Rated Breaking Capacity at 600 VDC: 10000 A

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

0433004.NR

Littelfuse

Electric Fuse

Surface Mount

24 V

24 V

4 A

Wraparound

1.024 J

-55 °C (-67 °F)

Tin Lead

50 A

433

Rated Breaking Capacity at 24 VDC: 50 A

Tape And Reel

0.125 in (3.18 mm)

0.06 in (1.52 mm)

e0

0.125 x 0.06 x 0.023 in (3.18 x 1.52 x 0.58 mm)

0.023 in (0.58 mm)

CSA; UL

90 °C (194 °F)

Very Fast

239004P

Littelfuse

Electric Fuse

Inline/Holder

125 V

4 A

End Cap

270.703 J

-55 °C (-67 °F)

Tin

10 kA

239P

Bulk; Tape And Reel

0.787 in (20 mm)

e3

0.787 x 0.205 in (20 x 5.2 mm)

0.205 in (5.2 mm)

CE; CSA; KTL; PSE; UL

125 °C (257 °F)

Time Lag

0208004MXE

Littelfuse

Electric Fuse

Through Hole Mount

350 V

4 A

Pin Wire

9.4 J

-55 °C (-67 °F)

Tin

100 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; PSE; UL

125 °C (257 °F)

Fast

RF0447-000

Littelfuse

Electric Fuse

Surface Mount

32 V

4 A

Wraparound

2.08 J

50 A

RF0447-000

UL

125 °C (257 °F)

0253004T1

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

0253004.HRT3L

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

Tape And Reel

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

3111400002

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

30 J

-40 °C (-40 °F)

Nickel

1.5 kA

311

Bulk

0.205 in (5.2 mm)

5 ms

Indicator

0.205 x 0.787 in (5.2 x 20 mm)

0.787 in (20 mm)

DIN 41577

85 °C (185 °F)

3431400000

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

500 J

-25 °C (-13 °F)

200 A

Bulk

0.248 in (6.3 mm)

12 s

0.248 x 1.26 in (6.3 x 32 mm)

1.26 in (32 mm)

CSA; UL

70 °C (158 °F)

Time Delay

0208004.MX

Littelfuse

Electric Fuse

4 A

End Cap

9.4 J

-55 °C (-67 °F)

100 A

0.189 in (4.8 mm)

350 V

2AG

0.189 x 0.587 in (4.8 x 14.9 mm)

0.587 in (14.9 mm)

CE, PSE, UL

125 °C (257 °F)

Fast

279004

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

1.38 J

-55 °C (-67 °F)

Tin Lead

10 kA

2 s

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

0.25 in (6.35 mm)

e0

125 V

Micro

0.25 x 0.35 in (6.35 x 8.89 mm)

0.35 in (8.89 mm)

CSA; UL

85 °C (185 °F)

Very Fast

0213004.P

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

226.5 J

-55 °C (-67 °F)

Nickel

40 A

213P

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)

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

125 °C (257 °F)

Time Lag

0251004.HXT1HF

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

Bulk

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

0318004.VXP

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

28.5 J

-55 °C (-67 °F)

Matte 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

0253004.PRT3L

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

Tape And Reel

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

0251004.PXT1L

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

4 ms

Rated Breaking Capacity at 125 VDC: 300 A

2.45

Bulk

0.11 in (2.8 mm)

Supplemental

e3

125 V

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

80814000440

Littelfuse

Electric Fuse

Through Hole Mount

250 V

250 V

4 A

Pin Wire

544.5 mJ

-65 °C (-85 °F)

Tin

200 A

10 s

Pre Arcing Time: Open within 10 s at 200% Rated Current

0.54

Bulk

0.35 in (8.9 mm)

0.183 in (4.65 mm)

e3

250 V

TE5

0.35 x 0.183 x 0.348 in (8.9 x 4.65 x 8.85 mm)

0.348 in (8.85 mm)

CUL; PSE; UL

125 °C (257 °F)

Fast

0318004MX

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

0481004

Littelfuse

Electric Fuse

Inline/Holder

125 V

125 V

4 A

End Cap

-55 °C (-67 °F)

Tin Lead

300 A

10 m

Rated Breaking Capacity at 125 VDC: 200 A

15.4

0.7 in (17.78 mm)

0.315 in (8 mm)

e0

125 V

Alarm

0.7 x 0.315 x 0.772 in (17.78 x 8 x 19.6 mm)

0.772 in (19.6 mm)

CSA; UL

90 °C (194 °F)

Fast

0267004.VXT

Littelfuse

Electric Fuse

Through Hole Mount

125 V

4 A

Pin Wire

-55 °C (-67 °F)

Gold

50 A

1 s

Rated Breaking Capacity at 125 VDC: 300 A

Bulk

0.093 in (2.36 mm)

e4

Pico

0.093 x 0.28 in (2.36 x 7.11 mm)

0.28 in (7.11 mm)

CSA; QPL

125 °C (257 °F)

Very Fast

0318004.MXP

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

28.5 J

-55 °C (-67 °F)

Tin

200 A

5 s

Bulk

0.275 in (6.99 mm)

e3

3AG

0.275 x 1.288 in (6.99 x 32.72 mm)

1.288 in (32.72 mm)

CE; CSA; KC; PSE; UL

125 °C (257 °F)

Fast

4191400000

Littelfuse

Electric Fuse

Surface Mount

125 V

125 V

4 A

End Cap

3.42 J

-65 °C (-85 °F)

Silver

50 A

Tape And Reel

0.24 in (6.1 mm)

0.109 in (2.77 mm)

e4

5 s

0.24 x 0.109 x 0.109 in (6.1 x 2.77 x 2.77 mm)

0.109 in (2.77 mm)

CSA; UL

125 °C (257 °F)

Very Fast

1941400043

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

15 J

-25 °C (-13 °F)

1.5 kA

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)

CUL; DIN; IEC; SEMKO; UL; VDE

70 °C (158 °F)

Very Fast

0677004.DRT4

Littelfuse

Electric Fuse

Through Hole Mount

250 V

250 V

4 A

Pin Wire

95 J

Tin Lead

40 A

95

Tape And Reel

0.154 in (3.9 mm)

e0

250 V

0.154 x 0.433 in (3.9 x 11 mm)

0.433 in (11 mm)

CSA; IEC; UL; VDE

Slow

3741400000

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

36 J

-40 °C (-40 °F)

Tin

50 A

Tape And Reel

0.335 in (8.5 mm)

e3

0.335 x 0.315 in (8.5 x 8 mm)

0.315 in (8 mm)

CSA; UL

85 °C (185 °F)

Time Lag

166.7000.4402

Littelfuse

Electric Fuse

Inline/Holder

80 V

4 A

Tab/Blade

14.4 J

Tin

Rated Breaking Capacity at 80 VDC: 1000A

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

0447004.YXP

Littelfuse

Electric Fuse

Through Hole Mount

350 V

4 A

Pin Wire

17 J

-60 °C (-76 °F)

100 A

5 s

17

Bulk

0.43 in (10.92 mm)

0.15 in (3.81 mm)

350 V

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

0.345 in (8.76 mm)

CSA; UL

125 °C (257 °F)

Fast

0215004.MRET1

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Wire

46.96 J

-55 °C (-67 °F)

Tin

1.5 kA

Bulk

0.228 in (5.8 mm)

e3

250 V

10 µs

0.197 x 0.787 in (5 x 20 mm)

0.886 in (22.5 mm)

CCC; CE; CQC; CSA; CUL; PSE; SEMKO; SEV; UL; VDE

125 °C (257 °F)

Time Lag

213004

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

202 J

-55 °C (-67 °F)

Nickel

100 A

20 ms

Pre Arcing Time: Open within 0.02 s at 1000% Rated Current

0.205 in (5.2 mm)

250 V

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)

CCC; CE; CSA; IEC; PSE; SEMKO; UL

125 °C (257 °F)

Time Lag

0491004.MAT1

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

-55 °C (-67 °F)

Pure Tin

50 A

300 ms

Pre-Arcing Time: Open within 0.3 s at 300% Rated Current

Ammo Pack

0.11 in (2.8 mm)

125 V

Pico

0.11 x 0.28 in (2.8 x 7.11 mm)

0.28 in (7.11 mm)

CSA; PSE; UL

125 °C (257 °F)

Very Fast

0263004.VRT1L

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

FLQ004R

Littelfuse

Electric Fuse

Inline/Holder

500 V

300 V

4 A

End Cap

10 kA

0.406 in (10.31 mm)

0.394 x 1.496 in (10 x 38 mm)

1.5 in (38.1 mm)

CSA; UL

Time Delay

0230004.HXP

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

148 J

-55 °C (-67 °F)

Matte Tin

400 A

4 h

148

Bulk

0.185 in (4.7 mm)

e3

125 V

2AG

Indicator

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

0473004.PXL

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

4 A

Pin Wire

35 J

-60 °C (-76 °F)

Tin

50 A

2 ms

Pre Arcing Time: Blow within 0.002 s at 800% Rated Current

Bulk

0.135 in (3.43 mm)

e3

Pico

0.28 in (7.11 mm)

CSA; PSE; UL

125 °C (257 °F)

Time Delay

FLNR004

Littelfuse

Electric Fuse

Inline/Holder

250 V

125 V

4 A

End Cap

200 kA

Rated Breaking Capacity at 125 VDC: 20000 A

Bulk

0.563 in (14.3 mm)

0.563 x 2 in (14.3 x 50.8 mm)

2 in (50.8 mm)

CSA; UL

Time Delay

0287004.U

Littelfuse

Electric Fuse

Inline/Holder

32 V

4 A

Tab/Blade

14 J

-40 °C (-40 °F)

Tin

1 kA

80 ms

0.752 in (19.1 mm)

0.201 in (5.1 mm)

e3

0.752 x 0.201 x 0.484 in (19.1 x 5.1 x 12.3 mm)

0.74 in (18.8 mm)

CSA; UL

125 °C (257 °F)

263004WX

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

3.08 J

-55 °C (-67 °F)

50 A

4 h

3.08

0.155 in (3.94 mm)

250 V

19.3 mΩ

Pico

0.28 in (7.11 mm)

0.28 in (7.11 mm)

CSA; PSE; UL

125 °C (257 °F)

Very Fast

0217004.MXGP

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

29.165 J

-55 °C (-67 °F)

40 A

10 ms

Bulk

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

0251004.NAT1L

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

4 ms

Rated Breaking Capacity at 125 VDC: 300 A

2.45

Ammo Pack

0.11 in (2.8 mm)

Supplemental

e3

125 V

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

0209004.MXEP

Littelfuse

Electric Fuse

Through Hole Mount

350 V

4 A

Pin Wire

148 J

-55 °C (-67 °F)

Matte Tin

100 A

3 s

148

Bulk

0.189 in (4.8 mm)

e3

350 V

2AG

0.185 x 0.57 in (4.7 x 14.48 mm)

0.587 in (14.9 mm)

CE; CUL; PSE; UL

125 °C (257 °F)

Time Lag

230004PDRTIP

Littelfuse

Electric Fuse

Through Hole Mount

125 V

4 A

Pin Wire

148 J

-55 °C (-67 °F)

Tin

400 A

Tape And Reel

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; METI; PSE; UL

125 °C (257 °F)

Slow

263004HRT1

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

3.08 J

-55 °C (-67 °F)

50 A

4 h

3.08

Tape And Reel

0.155 in (3.94 mm)

250 V

19.3 mΩ

Pico

0.28 in (7.11 mm)

0.28 in (7.11 mm)

CSA; PSE; UL

125 °C (257 °F)

Very Fast

203004.URG

Littelfuse

Electric Fuse

4 A

-55 °C (-67 °F)

50 A

4 h

8.8

Tape And Reel

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

0218004.MRET1P

Littelfuse

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

69.1 J

-55 °C (-67 °F)

Tin

40 A

69.1

Tape And Reel

0.228 in (5.8 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)

0.886 in (22.5 mm)

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

125 °C (257 °F)

Time Lag

0481004.HP

Littelfuse

Electric Fuse

Inline/Holder

125 V

125 V

4 A

End Cap

36 J

-55 °C (-67 °F)

Tin

300 A

5 m

0.701 in (17.8 mm)

0.228 in (5.8 mm)

e3

125 V

Alarm; Indicator

0.772 in (19.6 mm)

CSA; UL

125 °C (257 °F)

Fast

R251004T1

Littelfuse

Electric Fuse

Inline/Holder

125 V

125 V

4 A

Pin Wire

2.45 J

-55 °C (-67 °F)

50 A

R251

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; UL

125 °C (257 °F)

Very Fast

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.