1.25 A Fuses 748

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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

02171.25HXP

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

2.23 J

-55 °C (-67 °F)

35 A

10 ms

Pre Arcing Time: Open within 10 ms at 400% Rated Current

2.23

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

125 °C (257 °F)

Fast

R451.125NRL

Littelfuse

Electric Fuse

Surface Mount

125 V

125 V

1.25 A

Wraparound

664 mJ

-55 °C (-67 °F)

Gold with Nickel barrier

50 A

5 s

Pre Arcing Time: Open within 5 s at 200% Rated Current

Tape And Reel

0.24 in (6.1 mm)

0.106 in (2.69 mm)

e4

Nano

0.106 in (2.69 mm)

CSA; UL

125 °C (257 °F)

Very Fast

3031125042

Littelfuse

Electric Fuse

Through Hole Mount

125 V

63 V

1.25 A

Pin Wire

59 mJ

-25 °C (-13 °F)

Matte Tin

50 A

Rated Breaking Capacity at 63 VDC: 50 A

0.059

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

02341.25XEP

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

3.48 J

-55 °C (-67 °F)

Tin

100 A

Pre-Arcing Time: Open within 0.4 s, at 200% Rated Current

0.228 in (5.8 mm)

e3

0.228 x 0.886 in (5.8 x 22.5 mm)

0.886 in (22.5 mm)

CE; CSA; KTL; PSE; UL

125 °C (257 °F)

Medium

3971125000

Littelfuse

Electric Fuse

Through Hole Mount

125 V

1.25 A

Pin Wire

5 J

-40 °C (-40 °F)

Matte Tin

50 A

397

Ammo Pack; Tape And Reel

0.335 in (8.5 mm)

0.157 in (4 mm)

e3

80 ms

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

0.315 in (8 mm)

CSA; UL

85 °C (185 °F)

04351.25KRHF

Littelfuse

Electric Fuse

Surface Mount

32 V

1.25 A

Wraparound

35 mJ

-55 °C (-67 °F)

Matte Tin with Nickel barrier

35 A

4 h

Rated Breaking Capacity at 32 VDC: 35 A, Joule Integral Nom at 32 VDC: 0.0350

0.035

Tape And Reel

0.041 in (1.04 mm)

0.022 in (0.56 mm)

e3

32 V

Nano

0.041 x 0.022 x 0.015 in (1.04 x 0.56 x 0.38 mm)

0.015 in (0.38 mm)

CSA; UL

90 °C (194 °F)

Very Fast

02161.25MRET1P

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

180 mJ

-55 °C (-67 °F)

Tin

1.5 kA

0.48

Tape And Reel

0.228 in (5.8 mm)

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)

Fast

02511.25MRHF

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

1.25 A

Pin Wire

390 mJ

-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)

CSA; PSE; UL

125 °C (257 °F)

Very Fast

06641.25HXSL

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

6.3 J

-40 °C (-40 °F)

Tin

100 A

664

Bulk

0.335 in (8.5 mm)

e3

0.335 x 0.333 in (8.5 x 8.45 mm)

0.333 in (8.45 mm)

CCC; CSA; KTL; METI; PSE; UL; VDE

85 °C (185 °F)

Time Lag

CCMR1.25HXP

Littelfuse

Electric Fuse

Inline/Holder

600 V

300 V

1.25 A

End Cap

200 kA

Rated Breaking Capacity at 300 VDC: 20000 A

Bulk

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)

CE; CSA; UL

Time Delay

02511.25NRHF

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

1.25 A

Pin Wire

390 mJ

-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)

CSA; PSE; UL

125 °C (257 °F)

Very Fast

02531.25PXT3

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

1.25 A

Pin Wire

390 mJ

-55 °C (-67 °F)

Pure Tin

50 A

Rated Breaking Capacity at 125 VDC: 300 A, Pre Arcing Time: Open within 1000 ms at 200% Rated Current

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; UL

125 °C (257 °F)

Very Fast

02151.25MX

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

3.2 J

-55 °C (-67 °F)

Tin

1.5 kA

Tape And Reel

0.205 in (5.2 mm)

e3

250 V

10 µs

0.197 x 0.787 in (5 x 20 mm)

0.787 in (20 mm)

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

125 °C (257 °F)

Time Lag

3821125041

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

4.5 J

-40 °C (-40 °F)

Matte Tin

100 A

Bulk

0.335 in (8.5 mm)

e3

20 ms

0.335 x 0.315 in (8.5 x 8 mm)

0.315 in (8 mm)

CCC; IEC; KTL; PSE; SEMKO; UL; VDE

85 °C (185 °F)

Time Lag

0603TSFV125FM/65-2

Littelfuse

Electric Fuse

1.25 A

-55 °C (-67 °F)

Tin/Nickel

35 A

4 h

0.052

0.067 in (1.7 mm)

0.036 in (0.91 mm)

e2

65 V

0603

0.067 x 0.036 x 0.016 in (1.7 x 0.91 x 0.4 mm)

0.016 in (0.4 mm)

90 °C (194 °F)

Fast

FLQ1.25

Littelfuse

Electric Fuse

Inline/Holder

500 V

300 V

1.25 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

02321.25P

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

4.114 J

-55 °C (-67 °F)

Tin

100 A

Bulk; Tape And Reel

0.205 in (5.2 mm)

e3

0.205 x 0.787 in (5.2 x 20 mm)

0.787 in (20 mm)

CE; PSE

125 °C (257 °F)

Medium

3701125000

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

310 mJ

-40 °C (-40 °F)

35 A

Ammo Pack; Tape And Reel

0.335 in (8.5 mm)

20 ms

0.335 x 0.315 in (8.5 x 8 mm)

0.315 in (8 mm)

CCC; PSE; SEMKO; UL; VDE

85 °C (185 °F)

Fast

04381.25WRA

Littelfuse

Electric Fuse

Surface Mount

32 V

63 V

1.25 A

Wraparound

51 mJ

-55 °C (-67 °F)

50 A

5 s

Pre Arcing Time: Open within 5 s at 250% Rated Current

Tape And Reel

0.062 in (1.575 mm)

0.033 in (0.85 mm)

32 V

200 mΩ

0603

0.062 x 0.033 x 0.02 in (1.58 x 0.85 x 0.51 mm)

0.02 in (0.508 mm)

AEC-Q200; CSA; CUL; UL

150 °C (302 °F)

Fast

02131.25MRET1P

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

27.15 J

-55 °C (-67 °F)

35 A

27.15

Tape And Reel

0.217 in (5.5 mm)

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)

BSI, CCC, CE, CSA, PSE, UL, VDE

125 °C (257 °F)

Time Lag

3131.25P

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

24 J

Tin

100 A

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; METI; PSE; UL

Slow

02131.25MXGP

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

27.15 J

-55 °C (-67 °F)

35 A

27.15

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)

BSI, CCC, CE, CSA, PSE, UL, VDE

125 °C (257 °F)

Time Lag

2301.25PDRTIP

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

9.8 J

-55 °C (-67 °F)

Tin

100 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; CSA; METI; PSE; UL

125 °C (257 °F)

Slow

02341.25MXEP

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

2.06 J

-55 °C (-67 °F)

Tin

100 A

400 ms

3.39

Bulk

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; PSE; UL

125 °C (257 °F)

Medium

04911.25NRT1

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

1.25 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

Tape And Reel

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

3251.25P

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

24 J

Matte Tin

100 A

325P

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; PSE; UL

Slow

3981125000

Littelfuse

Electric Fuse

Through Hole Mount

65 V

65 V

1.25 A

Pin Wire

2.3 J

-40 °C (-40 °F)

Tin

50 A

Rated Breaking Capacity at 65 VDC: 50 A

Ammo Pack; Tape And Reel

0.335 in (8.5 mm)

0.157 in (4 mm)

e3

65 V

TE5

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

0.315 in (8 mm)

UL

85 °C (185 °F)

Medium Time Lag

02511.25MAT1

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

1.25 A

Pin Wire

390 mJ

-55 °C (-67 °F)

Tin

50 A

Rated Breaking Capacity at 125 VDC: 300 A, Pre Arcing Time: Open within 1000 ms at 200% Rated Current

Ammo Pack

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; PSE; UL

125 °C (257 °F)

Very Fast

02321.25PX125

Littelfuse

Electric Fuse

Through Hole Mount

125 V

1.25 A

Pin Wire

4.114 J

-55 °C (-67 °F)

Tin

10 kA

Bulk; Tape And Reel

0.228 in (5.8 mm)

e3

0.228 x 0.886 in (5.8 x 22.5 mm)

0.886 in (22.5 mm)

CE; PSE

125 °C (257 °F)

Medium

02301.25DRT3P

Littelfuse

Electric Fuse

Through Hole Mount

250 V

125 V

1.25 A

Pin Wire

9.8 J

-55 °C (-67 °F)

Matte Tin

100 A

Rated Breaking Capacity at 125 VDC: 10000 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; CSA; PSE; UL

125 °C (257 °F)

Time Lag

022051.25P

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

9.8 J

-55 °C (-67 °F)

Tin

35 A

2205

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; UL

125 °C (257 °F)

Time Lag

03221.25MXP

Littelfuse

Electric Fuse

Inline/Holder

250 V

125 V

1.25 A

End Cap

204 mJ

-55 °C (-67 °F)

100 A

1 s

Bulk

0.25 in (6.35 mm)

3AB

1.25 in (31.75 mm)

CE; CUL; PSE; UL

125 °C (257 °F)

Very Fast

04361.25PR

Littelfuse

Electric Fuse

Surface Mount

250 V

250 V

1.25 A

Wraparound

3.658 J

-55 °C (-67 °F)

Tin Lead

100 A

436

Tape And Reel

0.59 in (14.99 mm)

0.2 in (5.08 mm)

e0

0.59 x 0.2 x 0.095 in (14.99 x 5.08 x 2.41 mm)

0.095 in (2.41 mm)

CSA; UL

125 °C (257 °F)

02181.25MXGP

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

12.65 J

-55 °C (-67 °F)

Tin

35 A

Bulk

0.205 in (5.2 mm)

e3

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)

Time Lag

0FLQ1.25HXR

Littelfuse

Electric Fuse

Inline/Holder

500 V

300 V

1.25 A

End Cap

10 kA

0.406 in (10.31 mm)

500 V

0.394 x 1.496 in (10 x 38 mm)

1.5 in (38.1 mm)

CSA; UL

Time Delay

02321.25X125

Littelfuse

Electric Fuse

Through Hole Mount

125 V

1.25 A

Pin Wire

4.114 J

-55 °C (-67 °F)

Tin

10 kA

Bulk; Tape And Reel

0.228 in (5.8 mm)

e3

0.228 x 0.886 in (5.8 x 22.5 mm)

0.886 in (22.5 mm)

CE; PSE

125 °C (257 °F)

Medium

80711250000

Littelfuse

Electric Fuse

Through Hole Mount

300 V

300 V

1.25 A

Wire

3 kJ

-40 °C (-40 °F)

Tin

100 A

1 s

Ammo Pack

0.488 in (12.4 mm)

0.252 in (6.4 mm)

e3

300 V

0.488 x 0.252 x 0.362 in (12.4 x 6.4 x 9.2 mm)

0.362 in (9.2 mm)

IEC; CUL; PSE; UL

125 °C (257 °F)

Time Lag

02301.25DRT1SSP

Littelfuse

Electric Fuse

Through Hole Mount

250 V

125 V

1.25 A

Pin Wire

9.8 J

-55 °C (-67 °F)

Matte Tin

100 A

Rated Breaking Capacity at 125 VDC: 10000 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; CSA; PSE; UL

125 °C (257 °F)

Time Lag

03251.25MX52P

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

40 J

-55 °C (-67 °F)

Tin

4 h

24

0.275 in (6.985 mm)

e3

250 V

3AB

0.275 x 1.288 in (6.985 x 32.72 mm)

1.288 in (32.72 mm)

CE, CSA, PSE, UL

125 °C (257 °F)

Time Lag

02200025DRT3P

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

9.8 J

-55 °C (-67 °F)

Tin

100 A

4 h

9.8

0.177 in (4.5 mm)

Supplemental

e3

250 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)

04531.25MRSN

Littelfuse

Electric Fuse

Surface Mount

125 V

125 V

1.25 A

Wraparound

664 mJ

-55 °C (-67 °F)

Silver

50 A

Tape And Reel

0.24 in (6.1 mm)

0.106 in (2.69 mm)

e4

5 s

Nano

0.106 in (2.69 mm)

CE; CSA; PSE; TUV; UL

125 °C (257 °F)

Very Fast

02511.25HAT1HF

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

1.25 A

Pin Wire

390 mJ

-55 °C (-67 °F)

Matte Tin

50 A

251

Rated Breaking Capacity at 125 VDC: 300 A

Ammo Pack

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; PSE; UL

125 °C (257 °F)

Very Fast

LMF1-1/4

Littelfuse

Electric Fuse

Inline/Holder

300 V

1.25 A

End Cap

10 kA

0.61 in (15.49 mm)

0.61 x 1.82 in (15.49 x 46.23 mm)

1.82 in (46.23 mm)

CSA; UL

Time Delay

40011250440

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

14.44 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; VDE

125 °C (257 °F)

Time Lag

3721125043

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

9 J

-40 °C (-40 °F)

Matte Tin

35 A

Bulk

0.335 in (8.5 mm)

e3

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

3251.25MMXP

Littelfuse

Electric Fuse

Through Hole Mount

250 V

125 V

1.25 A

Pin Wire

24 J

-55 °C (-67 °F)

Matte Tin

100 A

Rated Breaking Capacity at 125 VDC: 10000 A

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; PSE; UL

125 °C (257 °F)

Time Lag

2391.25P

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

19.524 J

-55 °C (-67 °F)

Matte Tin

100 A

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

02331.25MXP

Littelfuse

Electric Fuse

Inline/Holder

125 V

1.25 A

End Cap

3.39 J

-55 °C (-67 °F)

Tin

10 kA

600 ms

Bulk

0.205 in (5.2 mm)

e3

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; KC; PSE; UL

125 °C (257 °F)

Medium

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.