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

1941125002

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

700 mJ

-25 °C (-13 °F)

1.5 kA

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; UL; VDE

70 °C (158 °F)

Very Fast

02161.25MRET3

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

480 mJ

-55 °C (-67 °F)

Tin

1.2 kA

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)

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

125 °C (257 °F)

Fast

02171.25MXBP

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

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

125 °C (257 °F)

Fast

02511.25PXHF

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

R451.125MRL

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

125 V

Nano

0.106 in (2.69 mm)

CSA; PSE; UL

125 °C (257 °F)

Very Fast

37211250511

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

13.75 J

-40 °C (-40 °F)

Matte Tin

35 A

20 ms

9

Bulk

0.335 in (8.5 mm)

e3

250 V

TR5

0.335 x 0.315 in (8.5 x 8 mm)

0.315 in (8 mm)

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

85 °C (185 °F)

Time Lag

R4511.25NR

Littelfuse

Electric Fuse

Surface Mount

125 V

125 V

1.25 A

Wraparound

664 mJ

-55 °C (-67 °F)

Tin/Lead

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)

e0

Nano

0.106 in (2.69 mm)

CSA; UL

125 °C (257 °F)

Very Fast

2171.25XE

Littelfuse

Electric Fuse

Through Hole Mount

250 V

250 V

1.25 A

Pin Wire

2.29 J

35 A

0.236 in (6 mm)

0.236 x 0.886 in (6 x 22.5 mm)

0.886 in (22.5 mm)

BSI; CCC; CSA; IEC; KTL; METI; PSE; SEMKO; UL; VDE

Fast

02531.25NAL

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

1.25 A

Pin Wire

390 mJ

-55 °C (-67 °F)

Tin

50 A

0253

Rated Breaking Capacity at 125 VDC: 300 A

Ammo Pack

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)

CSA; PSE; UL

125 °C (257 °F)

Very Fast

03131.25MXBP

Littelfuse

Electric Fuse

1.25 A

End Cap

-55 °C (-67 °F)

Tin

100 A

4 h

24

0.25 in (6.35 mm)

Supplemental

e3

250 V

3AG

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

022051.25HXP

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

9.8 J

-55 °C (-67 °F)

Tin

35 A

4 h

Bulk

0.185 in (4.7 mm)

e3

250 V

2AG

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

02531.25PXL

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

1.25 A

Pin Wire

390 mJ

-55 °C (-67 °F)

Tin

50 A

0253

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)

CSA; PSE; UL

125 °C (257 °F)

Very Fast

1911125040

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

2.8 J

-25 °C (-13 °F)

100 A

Bulk

0.213 in (5.4 mm)

5 s

0.197 x 0.787 in (5 x 20 mm)

0.827 in (21 mm)

CUL; UL

70 °C (158 °F)

Very Fast

02301.25MXOP

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

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

02511.25MRT1HF

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

02321.25

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

4.22 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

02531.25HRT3L

Littelfuse

Electric Fuse

Through Hole Mount

125 V

125 V

1.25 A

Pin Wire

390 mJ

-55 °C (-67 °F)

Tin Over Copper

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)

CSA; PSE; UL

125 °C (257 °F)

Very Fast

3731125000

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

200 mJ

-40 °C (-40 °F)

Matte Tin

50 A

373

Ammo Pack; Tape And Reel

0.335 in (8.5 mm)

e3

5 s

0.335 x 0.315 in (8.5 x 8 mm)

0.315 in (8 mm)

CSA; UL

85 °C (185 °F)

Fast

06771.25

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

12.1 J

Tin Lead

35 A

0.154 in (3.9 mm)

e0

0.154 x 0.433 in (3.9 x 11 mm)

0.433 in (11 mm)

CCC; CSA; IEC; UL; VDE

Slow

04911.25NAT1HF

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

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

2301.25DRT1W

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

9.8 J

-55 °C (-67 °F)

Tin Lead

100 A

230

Tape And Reel

0.185 in (4.7 mm)

e0

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

02200025DAT1P

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)

2381.25

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

20.05 J

238

0.207 in (5.25 mm)

0.207 x 0.886 in (5.25 x 22.5 mm)

0.886 in (22.5 mm)

CSA; MITI; UL

Time Lag

39811250000

Littelfuse

Electric Fuse

Through Hole Mount

65 V

65 V

1.25 A

Pin Wire

2.34 J

-40 °C (-40 °F)

Tin

50 A

10 s

Ammo Pack; Tape And Reel

0.335 in (8.5 mm)

0.157 in (4 mm)

e3

TE5

0.315 in (8 mm)

CUL; UL

125 °C (257 °F)

Medium Time Lag

02531.25PAL

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

Ammo Pack

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)

CSA; PSE; UL

125 °C (257 °F)

Very Fast

04581.25DR

Littelfuse

Electric Fuse

Surface Mount

48 V

75 V

1.25 A

Wraparound

313 mJ

-55 °C (-67 °F)

Gold

50 A

5 s

0.3

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)

3721125010

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

9 J

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; IEC; KTL; METI; PSE; SEMKO; UL; VDE

03121.25VX

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

1.45 J

-55 °C (-67 °F)

Tin

100 A

312

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; KTL; PSE; UL

125 °C (257 °F)

Fast

2410SFV1.25FM/125-2

Littelfuse

Electric Fuse

1.25 A

-55 °C (-67 °F)

4 h

Tape And Reel

0.246 in (6.25 mm)

0.104 in (2.64 mm)

250 V

0.246 x 0.104 x 0.093 in (6.25 x 2.64 x 2.36 mm)

0.093 in (2.36 mm)

CSA, TUV, UL

125 °C (257 °F)

Very Fast

1911125002

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

2.8 J

-25 °C (-13 °F)

100 A

Bulk

0.205 in (5.2 mm)

5 s

0.197 x 0.787 in (5 x 20 mm)

0.787 in (20 mm)

CUL; UL

70 °C (158 °F)

Very Fast

02301.25ERT3SP

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

38211250430

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Wire

6.88 J

-40 °C (-40 °F)

Tin

100 A

150 ms

4.5

Bulk

0.335 in (8.5 mm)

e3

250 V

TR5

0.335 x 0.315 in (8.5 x 8 mm)

0.315 in (8 mm)

CCC; CE; CUL; PSE; UL; VDE

85 °C (185 °F)

Time Lag

02291.25

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

100 A

229

Joule Integral Nom at Rated Voltage(DC): 9.8

CSA; PSE; UL

Slow

04911.25MRT1HF

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

0FLQ1.25T

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

20111250301P

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

5.12 J

-25 °C (-13 °F)

80 A

5 ms

Pre Arcing Time: Open within 5 ms at 1000% Rated Current

Bulk

0.205 in (5.2 mm)

0.197 x 0.787 in (5 x 20 mm)

Indicator

0.205 x 0.787 in (5.2 x 20 mm)

0.787 in (20 mm)

CUL; UL

70 °C (158 °F)

Medium Time Lag

02351.25HXP

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

1.085 J

-55 °C (-67 °F)

Nickel

100 A

5 s

Bulk

0.197 in (5 mm)

250 V

0.197 x 0.787 in (5 x 20 mm)

0.787 in (20 mm)

125 °C (257 °F)

Fast

04511.25MRSN

Littelfuse

Electric Fuse

Surface Mount

125 V

125 V

1.25 A

Wraparound

664 mJ

-55 °C (-67 °F)

50 A

5 s

Tape And Reel

0.24 in (6.1 mm)

0.106 in (2.69 mm)

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

R4511.25NRL

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

3401125000

Littelfuse

Electric Fuse

Inline/Holder

250 V

1.25 A

End Cap

1.5 J

-25 °C (-13 °F)

100 A

Bulk

0.248 in (6.3 mm)

120 s

0.248 x 1.26 in (6.3 x 32 mm)

1.26 in (32 mm)

CSA; UL

70 °C (158 °F)

Very Fast

02391.25MXEP

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

19.525 J

-55 °C (-67 °F)

Tin

100 A

2 m

19.52

Bulk

0.217 in (5.5 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)

0.846 in (21.5 mm)

CE; CSA; KC; PSE; UL

125 °C (257 °F)

Time Lag

040011250440

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

0.315 in (8 mm)

CQC; CUL; KTL; PSE; UL; VDE

85 °C (185 °F)

Time Lag

02301.25MXF16P

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

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

06761.25DRT4

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

750 mJ

Tin Lead

35 A

0.75

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)

CCC; CSA; UL; VDE

Fast

04511.25MR

Littelfuse

Electric Fuse

Surface Mount

125 V

125 V

1.25 A

Wraparound

664 mJ

-55 °C (-67 °F)

50 A

4 h

Tape And Reel

0.24 in (6.1 mm)

0.106 in (2.69 mm)

e0

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; PSE; UL

125 °C (257 °F)

Very Fast

2181.25M

Littelfuse

Electric Fuse

1.25 A

End Cap

-55 °C (-67 °F)

35 A

12.65

0.787 in (20 mm)

Supplemental

250 V

44.6 mΩ

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)

Time Lag

3821125000

Littelfuse

Electric Fuse

Through Hole Mount

250 V

1.25 A

Pin Wire

4.5 J

-40 °C (-40 °F)

Matte Tin

100 A

Ammo Pack; Tape And Reel

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

FLNR1.25ID

Littelfuse

Electric Fuse

Inline/Holder

250 V

125 V

1.25 A

End Cap

200 kA

0.563 in (14.3 mm)

Indicator

0.563 x 2 in (14.3 x 50.8 mm)

2 in (50.8 mm)

CSA; UL

Time Delay

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.