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

03321.25HXP

Littelfuse

Electric Fuse

Inline/Holder

250 V

125 V

1.25 A

End Cap

204 mJ

-55 °C (-67 °F)

100 A

1 s

0.156

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

02511.25HXHF

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

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)

CSA; PSE; UL

125 °C (257 °F)

Very Fast

4561125000

Littelfuse

Electric Fuse

Surface Mount

125 V

1.25 A

Wraparound

50 J

-40 °C (-40 °F)

Blister Tape

0.398 in (10.1 mm)

0.098 in (2.5 mm)

120 s

10025

0.033 in (0.85 mm)

CUL; UL

85 °C (185 °F)

02131.25MX

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

27.15 J

-55 °C (-67 °F)

35 A

20 ms

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

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

125 °C (257 °F)

Time Lag

30311250421

Littelfuse

Electric Fuse

Through Hole Mount

125 V

63 V

1.25 A

Pin Wire

59 mJ

-25 °C (-13 °F)

50 A

1 m

Pre Arcing Time: Open within 60 s at 200% Rated Current

Bulk

0.236 in (6 mm)

0.315 in (8 mm)

CSA; UL

70 °C (158 °F)

Fast

30311250001

Littelfuse

Electric Fuse

Through Hole Mount

125 V

63 V

1.25 A

Pin Wire

59 mJ

-25 °C (-13 °F)

50 A

1 m

Pre Arcing Time: Open within 60 s at 200% Rated Current

Ammo Pack; Tape

0.236 in (6 mm)

0.315 in (8 mm)

CSA; UL

70 °C (158 °F)

Fast

30311250131

Littelfuse

Electric Fuse

Through Hole Mount

125 V

63 V

1.25 A

Pin Wire

59 mJ

-25 °C (-13 °F)

50 A

1 m

Pre Arcing Time: Open within 60 s at 200% Rated Current

Bulk

0.236 in (6 mm)

0.315 in (8 mm)

CSA; UL

70 °C (158 °F)

Fast

0FLM1.25T

Littelfuse

Electric Fuse

Inline/Holder

250 V

125 V

1.25 A

End Cap

10 kA

5 s

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

Bulk

0.406 in (10.31 mm)

0.394 x 1.496 in (10 x 38 mm)

1.5 in (38.1 mm)

CE; CSA; QPL; UL

Time Delay

02131.25MXG

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

27.15 J

-55 °C (-67 °F)

35 A

20 ms

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

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

125 °C (257 °F)

Time Lag

02131.25HX

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

27.15 J

-55 °C (-67 °F)

35 A

20 ms

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

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

125 °C (257 °F)

Time Lag

05071.25MX

Littelfuse

Electric Fuse

Inline/Holder

650 V

1.25 A

End Cap

1.5 J

-55 °C (-67 °F)

150 A

2 m

Pre Arcing Time: Open within 120 s at 200% Rated Current

Bulk

0.25 in (6.35 mm)

0.248 x 1.26 in (6.3 x 32 mm)

1.25 in (31.75 mm)

CE; CSA; CUL; UL

125 °C (257 °F)

04221.25MR

Littelfuse

Electric Fuse

Surface Mount

250 V

250 V

1.25 A

Wraparound

1.09 J

-55 °C (-67 °F)

Matte Tin Over Nickel

50 A

5 s

Tape And Reel

0.246 in (6.25 mm)

0.098 in (2.5 mm)

e3

2410

0.088 in (2.24 mm)

CUL; TUV; UL

125 °C (257 °F)

Fast

0FLA1.25T

Littelfuse

Electric Fuse

Inline/Holder

125 V

1.25 A

End Cap

10 kA

5 s

Bulk

0.406 in (10.31 mm)

5AG

Indicator

1.5 in (38.1 mm)

UL

Time Delay

FLSR1.25TXID

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

0.815 in (20.7 mm)

Indicator

5 in (127 mm)

CSA; UL

Time Delay

04221.25MRA

Littelfuse

Electric Fuse

Surface Mount

250 V

250 V

1.25 A

Wraparound

1.09 J

-55 °C (-67 °F)

50 A

5 s

Tape And Reel

0.246 in (6.25 mm)

0.098 in (2.5 mm)

0.088 in (2.24 mm)

AEC-Q200; CUL; PSE; TUV; UL

125 °C (257 °F)

Fast

FLA1.25

Littelfuse

Electric Fuse

Inline/Holder

125 V

1.25 A

End Cap

10 kA

5 s

Bulk

0.406 in (10.31 mm)

5AG

Indicator

1.5 in (38.1 mm)

UL

Time Delay

FLNR1.25T

Littelfuse

Electric Fuse

Inline/Holder

250 V

125 V

1.25 A

End Cap

200 kA

Rated Breaking Capacity at 125 VDC: 20000 A

Bulk

0.563 in (14.3 mm)

2 in (50.8 mm)

CSA; UL

Time Delay

37011250430

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

310 mJ

-40 °C (-40 °F)

Tin

35 A

20 ms

Ammo Pack; Tape

0.335 in (8.5 mm)

e3

TR5

0.315 in (8 mm)

CCC; CE; CUL; PSE; UL; VDE

85 °C (185 °F)

Fast

37211250075

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

13.75 J

-40 °C (-40 °F)

35 A

20 ms

0.335 in (8.5 mm)

TR5

0.315 in (8 mm)

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

85 °C (185 °F)

Time Lag

02131.25MRET1

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

27.15 J

-55 °C (-67 °F)

35 A

20 ms

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

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

125 °C (257 °F)

Time Lag

02131.25MXB

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

27.15 J

-55 °C (-67 °F)

35 A

20 ms

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

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

125 °C (257 °F)

Time Lag

05071.25MXE

Littelfuse

Electric Fuse

Through Hole Mount

650 V

1.25 A

Pin Wire

1.5 J

-55 °C (-67 °F)

150 A

2 m

Pre Arcing Time: Open within 120 s at 200% Rated Current

Bulk

0.275 in (6.985 mm)

0.248 x 1.26 in (6.3 x 32 mm)

1.288 in (32.72 mm)

CE; CSA; CUL; UL

125 °C (257 °F)

02321.25MRET1P

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

4.11 J

-60 °C (-76 °F)

10 kA

2 m

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

Tape And Reel

0.205 in (5.2 mm)

0.197 x 0.787 in (5 x 20 mm)

0.787 in (20 mm)

CE; KC; PSE

125 °C (257 °F)

Medium

02321.25MRET1125P

Littelfuse

Electric Fuse

Inline/Holder

125 V

1.25 A

End Cap

4.11 J

-60 °C (-76 °F)

10 kA

2 m

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

Tape And Reel

0.205 in (5.2 mm)

0.197 x 0.787 in (5 x 20 mm)

0.787 in (20 mm)

CE; KC; PSE

125 °C (257 °F)

Medium

LLSRK1.25.TXID

Littelfuse

Electric Fuse

Inline/Holder

600 V

300 V

1.25 A

End Cap

200 kA

Rated Breaking Capacity at 300 VDC: 20000 A

0.811 in (20.6 mm)

Indicator

5 in (127 mm)

CE; CSA; UL; QPL

Time Delay

LLNRK1.25.V

Littelfuse

Electric Fuse

Inline/Holder

250 V

125 V

1.25 A

End Cap

200 kA

Rated Breaking Capacity at 125 VDC: 20000 A

0.563 in (14.3 mm)

2 in (50.8 mm)

CE; CSA; UL; QPL

Time Delay

2171.25P

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

2.23 J

-55 °C (-67 °F)

Matte Tin

35 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)

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

125 °C (257 °F)

Fast

03261.25VXP

Littelfuse

Electric Fuse

Inline/Holder

250 V

250 V

1.25 A

End Cap

-55 °C (-67 °F)

Nickel

4 h

24

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 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.