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

KLB4

Littelfuse

Electric Fuse

Inline/Holder

250 V

250 V

4 A

End Cap

200 kA

KLB

Rated Breaking Capacity at 250 VDC: 20000 A

0.563 in (14.3 mm)

0.563 x 2 in (14.3 x 50.8 mm)

2 in (50.8 mm)

CSA; UL

Fast

0458004.DR

Littelfuse

Electric Fuse

Surface Mount

32 V

75 V

4 A

Wraparound

4.832 J

-55 °C (-67 °F)

Gold

50 A

5 s

4.8

Tape And Reel

0.125 in (3.175 mm)

0.062 in (1.575 mm)

e4

75 V

Nano

0.125 x 0.062 x 0.062 in (3.175 x 1.575 x 1.575 mm)

0.062 in (1.575 mm)

CUL; UL

125 °C (257 °F)

0297004.WXNV

Littelfuse

Electric Fuse

Inline/Holder

32 V

4 A

Tab/Blade

31 J

-40 °C (-40 °F)

Silver

1 kA

30 ms

17

0.429 in (10.9 mm)

0.15 in (3.8 mm)

e4

32 V

Mini

0.429 x 0.15 x 0.346 in (10.9 x 3.8 x 8.8 mm)

0.346 in (8.8 mm)

UL

125 °C (257 °F)

0297004WXNV

Littelfuse

Electric Fuse

Inline/Holder

32 V

4 A

Tab/Blade

17 J

-40 °C (-40 °F)

Silver

Rated Breaking Capacity at 32 VDC: 1000 A

0.429 in (10.9 mm)

0.15 in (3.8 mm)

e4

0.429 x 0.15 x 0.346 in (10.9 x 3.8 x 8.8 mm)

0.346 in (8.8 mm)

125 °C (257 °F)

0251004.MRT1L

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

Pre-Arcing Time: Open within 4 ms at 1000% Rated Current

2.45

Tape And Reel

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; CUL; PSE; TUV; UL

125 °C (257 °F)

Very Fast

0251004.MXL

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

Pre-Arcing Time: Open within 4 ms at 1000% Rated Current

Bulk

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; CUL; PSE; TUV; UL

125 °C (257 °F)

Very Fast

ATDR4

Mersen S A

Electric Fuse

Inline/Holder

600 V

300 V

4 A

End Cap

200 kA

Rated Breaking Capacity at 300 VDC: 100000 A

0.409 in (10.4 mm)

0.409 x 1.5 in (10.4 x 38.1 mm)

1.5 in (38.1 mm)

CSA; UL

Time Delay

0251004.MAT1L

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

SS-5-4A-AP

Eaton Corporation

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

87 J

-40 °C (-40 °F)

Tin

40 A

87

Ammo Pack

0.335 in (8.5 mm)

0.169 in (4.3 mm)

e3

250 V

0.335 x 0.169 x 0.329 in (8.5 x 4.3 x 8.35 mm)

0.329 in (8.35 mm)

CQC; EK; PSE; SEMKO; UL; VDE

125 °C (257 °F)

Time Delay

0251004.HAT1L

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

ATQR4

Mersen S A

Electric Fuse

Inline/Holder

600 V

300 V

4 A

End Cap

200 kA

Rated Breaking Capacity at 300 VDC: 100000 A

0.409 in (10.4 mm)

0.409 x 1.5 in (10.4 x 38.1 mm)

1.5 in (38.1 mm)

CSA, CE, UL

80 °C (176 °F)

Time Delay

LP-CC-4

Eaton Corporation

Electric Fuse

Inline/Holder

600 V

150 V

4 A

End Cap

200 kA

Rated Breaking Capacity at 150 VDC: 20000 A

Box

0.394 in (10 mm)

0.406 x 1.5 in (10.3 x 38.1 mm)

1.496 in (38 mm)

CE; CSA; UL

Time Delay

FNQ-R-4

Eaton Corporation

Electric Fuse

Inline/Holder

600 V

4 A

End Cap

Nickel

200 kA

Box

0.406 in (10.3 mm)

CC

600 V

0.406 x 1.5 in (10.3 x 38.1 mm)

1.5 in (38.1 mm)

CE; CSA; UL

Time Delay

BK/MDA-4-R

Eaton Corporation

Electric Fuse

Inline/Holder

250 V

125 V

4 A

End Cap

147.4 J

Nickel

200 A

2 m

Rated Breaking Capacity at 125 VDC: 10000 A

Box

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)

CSA, UL

Time Delay

0451004.MRL

Littelfuse

Electric Fuse

Surface Mount

125 V

125 V

4 A

Wraparound

3.152 J

-55 °C (-67 °F)

Gold

50 A

5 s

Tape And Reel

0.24 in (6.1 mm)

0.106 in (2.69 mm)

e4

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

0685T4000-01

Bel Fuse

Electric Fuse

Surface Mount

63 V

63 V

4 A

Wraparound

2.56 J

-55 °C (-67 °F)

Tin Over Nickel

50 A

2 ms

Tape And Reel, 7 inch

0.126 in (3.2 mm)

0.062 in (1.58 mm)

e3

63 V

1206

0.025 in (0.63 mm)

AEC-Q200; TUV; UL

125 °C (257 °F)

Slow

39214000440

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

100

Bulk

0.335 in (8.5 mm)

0.157 in (4 mm)

e3

250 V

TE5

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

0.315 in (8 mm)

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

125 °C (257 °F)

Time Lag

3404.2422.11

Schurter Ag

Electric Fuse

Surface Mount

250 V

125 V

4 A

Wraparound

26 J

-40 °C (-40 °F)

Gold

200 A

Rated Breaking Capacity at 125 VDC: 100 A

Bag

0.445 in (11.3 mm)

0.165 in (4.2 mm)

e4

10 ms

0.165 x 0.437 in (4.2 x 11.1 mm)

0.421 x 0.142 x 0.157 in (10.7 x 3.6 x 4 mm)

0.157 in (4 mm)

CUL; UL; VDE

85 °C (185 °F)

Time Lag

0217004.MXP

Littelfuse

Electric Fuse

Inline/Holder

250 V

60 V

4 A

End Cap

29.165 J

-55 °C (-67 °F)

Tin

40 A

10 ms

Bulk

0.205 in (5.2 mm)

e3

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; KC; PSE; SEMKO; SEV; UL; VDE

125 °C (257 °F)

Very Fast

0452004.MRL

Littelfuse

Electric Fuse

Surface Mount

125 V

125 V

4 A

Wraparound

34.4 J

-55 °C (-67 °F)

Gold

50 A

2 ms

34.4

Tape And Reel

0.24 in (6.1 mm)

0.106 in (2.69 mm)

e4

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)

CSA; CUL; UL

125 °C (257 °F)

Slow

0402SFF400F/24-2

TE Connectivity

Electric Fuse

Surface Mount

24 V

4 A

Wraparound

-55 °C (-67 °F)

35 A

4 h

Tape And Reel

0.043 in (1.1 mm)

0.024 in (0.61 mm)

24 V

0402

0.043 x 0.024 x 0.024 in (1.1 x 0.61 x 0.61 mm)

0.024 in (0.61 mm)

UL

125 °C (257 °F)

Fast

0216004.MXP

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

14.995 J

-55 °C (-67 °F)

Nickel

1.5 kA

20 ms

14.995

Bulk

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; KC; PSE; SEMKO; SEV; UL; VDE

125 °C (257 °F)

Fast

0216004MXP

Littelfuse

Electric Fuse

Inline/Holder

250 V

250 V

4 A

End Cap

14.995 J

-55 °C (-67 °F)

Tin

1.5 kA

10 ms

Bulk

0.205 in (5.2 mm)

e3

0.197 x 0.787 in (5 x 20 mm)

0.787 in (20 mm)

CCC, CE, CSA, PSE, UL, VDE

125 °C (257 °F)

Fast

0234004.MXP

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

10.37 J

-55 °C (-67 °F)

Nickel

200 A

400 ms

10.37

Bulk

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)

CE; CSA; PSE; UL

125 °C (257 °F)

Medium

KLKD004.T

Littelfuse

Electric Fuse

Inline/Holder

600 V

600 V

4 A

End Cap

19 mJ

-55 °C (-67 °F)

Nickel

100 kA

4 m

0.406 in (10.31 mm)

600 V

0.394 x 1.496 in (10 x 38 mm)

1.5 x 1.5 in (38.1 x 38.1 mm)

1.5 in (38.1 mm)

CE; CSA; IEC; UL; VDE

125 °C (257 °F)

Fast

0034.6020

Schurter Ag

Electric Fuse

Through Hole Mount

250 V

4 A

Pin Wire

7.9 J

-40 °C (-40 °F)

Tin

35 A

Bulk

0.335 in (8.5 mm)

e3

3 ms

0.335 x 0.335 in (8.5 x 8.5 mm)

0.335 in (8.5 mm)

CUL; UL

85 °C (185 °F)

Very Fast

0453004.MR

Littelfuse

Electric Fuse

Surface Mount

125 V

125 V

4 A

Wraparound

3.152 J

-55 °C (-67 °F)

Silver

50 A

5 s

Tape And Reel

0.24 in (6.1 mm)

0.106 in (2.69 mm)

e4

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

0453004MR

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

125 V

Nano

0.106 in (2.69 mm)

CSA, PSE, UL

125 °C (257 °F)

Very Fast

0466004.NR

Littelfuse

Electric Fuse

Surface Mount

32 V

32 V

4 A

Wraparound

1.024 J

-55 °C (-67 °F)

Matte Tin Over Nickel

35 A

200 ms

Pre Arcing Time: Open within 0.2 s at 300% Rated Current

1.024

Tape And Reel

0.125 in (3.18 mm)

0.06 in (1.52 mm)

e3

32 V

1206

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

BK-MDL-4-R

Eaton Corporation

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

19.3 J

Nickel

200 A

Box

0.25 in (6.35 mm)

250 V

0.252 x 1.248 in (6.4 x 31.7 mm)

0.25 x 1.25 in (6.35 x 31.75 mm)

1.25 in (31.75 mm)

CE; CSA; UL

Time Delay

BK/MDL-4-R

Cooper Electronic Technologies

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

19.3 J

200 A

MDL

Box

0.25 in (6.35 mm)

0.25 x 1.25 in (6.35 x 31.75 mm)

1.25 in (31.75 mm)

CSA; UL

Time Delay

0464004.DR

Littelfuse

Electric Fuse

Surface Mount

250 V

4 A

End Cap

15.1 J

-55 °C (-67 °F)

100 A

13.85

Tape And Reel

0.476 in (12.1 mm)

0.177 in (4.5 mm)

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)

PSE; UMF

125 °C (257 °F)

Fast

KTK-R-4

Eaton Corporation

Electric Fuse

Inline/Holder

600 V

4 A

End Cap

Nickel

200 kA

Box

0.406 in (10.3 mm)

CC

600 V

0.406 x 1.5 in (10.3 x 38.1 mm)

1.5 in (38.1 mm)

CE; CSA; UL

Fast

KTK-4

Eaton Corporation

Electric Fuse

Inline/Holder

600 V

4 A

End Cap

100 kA

0.406 in (10.3 mm)

600 V

0.406 x 1.5 in (10.3 x 38.1 mm)

1.5 in (38.1 mm)

CSA, UL

Fast

0469004.WR

Littelfuse

Electric Fuse

Surface Mount

32 V

4 A

Wraparound

3.56 J

-55 °C (-67 °F)

Tin with Nickel barrier

60 A

2 ms

0.23

Tape And Reel

0.129 in (3.27 mm)

0.064 in (1.63 mm)

e3

32 V

52 mΩ

1206

0.129 x 0.064 x 0.035 in (3.27 x 1.63 x 0.9 mm)

0.035 in (0.9 mm)

CSA; CUL; UL

150 °C (302 °F)

Slow

BK/ATC-4

Eaton Corporation

Electric Fuse

Inline/Holder

32 V

32 V

4 A

Tab/Blade

-40 °C (-40 °F)

1 kA

100 ms

Bulk

0.752 in (19.1 mm)

0.201 in (5.1 mm)

32 V

0.76 x 0.207 x 0.492 in (19.3 x 5.25 x 12.5 mm)

0.483 in (12.28 mm)

UL

100 °C (212 °F)

Fast

FRS-R-4

Eaton Corporation

Electric Fuse

Inline/Holder

600 V

300 V

4 A

End Cap

200 kA

Rated Breaking Capacity at 300 VDC: 20000 A

Box

0.811 in (20.6 mm)

0.811 x 5 in (20.6 x 127 mm)

5 in (127 mm)

CE; CSA; UL

Time Delay

0466004.NRHF

Littelfuse

Electric Fuse

Surface Mount

32 V

32 V

4 A

Wraparound

1.764 J

-55 °C (-67 °F)

Matte Tin Over Nickel

50 A

200 ms

1.024

Tape And Reel

0.125 in (3.175 mm)

0.06 in (1.524 mm)

Supplemental

e3

32 V

1206

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

0.023 in (0.584 mm)

CSA; TUV; UL

90 °C (194 °F)

Fast

MFU0805FF04000P100

Vishay Intertechnology

Electric Fuse

Surface Mount

32 V

4 A

Wraparound

40.3 mJ

15 °C (59 °F)

Tin Over Nickel

50 A

Tape And Reel

0.079 in (2 mm)

0.049 in (1.25 mm)

e3

0.079 x 0.049 x 0.018 in (2 x 1.25 x 0.45 mm)

0.018 in (0.45 mm)

UL; UMF

35 °C (95 °F)

Very Fast

012004

Legrand

Electric Fuse

Inline/Holder

400 V

4 A

Tab/Blade

-25 °C (-13 °F)

20 kA

Bulk

0.335 in (8.5 mm)

0.335 x 1.24 in (8.5 x 31.5 mm)

1.24 in (31.5 mm)

EN; IEC

40 °C (104 °F)

0326004.MXP

Littelfuse

Electric Fuse

Inline/Holder

250 V

125 V

4 A

End Cap

9.71 J

-55 °C (-67 °F)

Nickel

400 A

5 s

Rated Breaking Capacity at 125 VDC: 10000 A

9.71

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; CSA; PSE; UL

125 °C (257 °F)

Time Delay

38314000410

Littelfuse

Electric Fuse

Through Hole Mount

320 V

4 A

Pin Wire

72 J

-40 °C (-40 °F)

50 A

20 ms

Bulk

0.335 in (8.5 mm)

TR5

0.335 x 0.315 in (8.5 x 8 mm)

0.315 in (8 mm)

CE; CUL; PSE; UL; VDE

85 °C (185 °F)

Time Lag

C99830-000

TE Connectivity

Electric Fuse

Surface Mount

24 V

4 A

Wraparound

35 A

UL

125 °C (257 °F)

Fast

0312004.MXP

Littelfuse

Electric Fuse

Inline/Holder

250 V

4 A

End Cap

28.5 J

-55 °C (-67 °F)

Nickel

200 A

5 s

28.5

Tape And Reel

0.25 in (6.35 mm)

250 V

3AG

0.25 x 1.25 in (6.35 x 31.75 mm)

1.25 in (31.75 mm)

CE; CSA; KC; PSE; UL

125 °C (257 °F)

Fast

FRN-R-4

Eaton Corporation

Electric Fuse

Inline/Holder

250 V

125 V

4 A

End Cap

200 kA

Rated Breaking Capacity at 125 VDC: 20000 A

Box

0.56 in (14.22 mm)

RK5

250 V

0.563 x 2 in (14.3 x 50.8 mm)

2 in (50.8 mm)

CE; CSA; UL

Time Delay

012304

Legrand

Electric Fuse

Inline/Holder

400 V

4 A

End Cap

-25 °C (-13 °F)

20 kA

Bulk

0.335 in (8.5 mm)

0.315 x 1.26 in (8 x 32 mm)

1.24 in (31.5 mm)

EN; IEC

40 °C (104 °F)

0440004.WR

Littelfuse

Electric Fuse

Surface Mount

32 V

32 V

4 A

Wraparound

2.601 J

-55 °C (-67 °F)

Tin Over Nickel

50 A

4 h

0.07

Tape And Reel

0.126 in (3.2 mm)

0.064 in (1.63 mm)

e3

32 V

1206

0.126 x 0.064 x 0.032 in (3.2 x 1.63 x 0.82 mm)

0.032 in (0.82 mm)

CSA; UL

150 °C (302 °F)

MFU0603FF04000P100

Vishay Intertechnology

Electric Fuse

Surface Mount

32 V

4 A

Wraparound

40.3 mJ

15 °C (59 °F)

Tin Over Nickel

50 A

0.0403

Tape And Reel

0.061 in (1.55 mm)

0.033 in (0.85 mm)

e3

32 V

19 mΩ

0603

0.061 x 0.033 x 0.018 in (1.55 x 0.85 x 0.45 mm)

0.018 in (0.45 mm)

UL; UMF

35 °C (95 °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.