12 A Fuses 495

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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

0312012MX

Littelfuse

Electric Fuse

Inline/Holder

32 V

12 A

End Cap

234.6 J

-55 °C (-67 °F)

Tin

300 A

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)

CSA; UL

125 °C (257 °F)

Fast

SPF012

Littelfuse

Electric Fuse

Inline/Holder

1 KV

12 A

End Cap

599.198 J

20 kA

40 m

0.406 in (10.31 mm)

Midget

1.5 in (38.1 mm)

CCC; CE; IEC; UL; VDE

KLDR012.H

Littelfuse

Electric Fuse

Inline/Holder

600 V

300 V

12 A

End Cap

200 kA

KLDR

Rated Breaking Capacity at 300 VDC: 20000 A

Bulk

0.406 in (10.3 mm)

0.406 x 1.5 in (10.3 x 38.1 mm)

1.5 in (38.1 mm)

CSA; UL

Time Delay

SPXI012.L

Littelfuse

Electric Fuse

Inline/Holder

1.5 KV

12 A

End Cap

798 J

30 kA

4 m

Bulk

0.406 in (10.31 mm)

1.5 KV

0.406 x 4.354 in (10.31 x 110.6 mm)

4.333 in (110.06 mm)

CUL; TUV; UL

0322012HXP

Littelfuse

Electric Fuse

12 A

End Cap

-55 °C (-67 °F)

Nickel

200 A

4 h

60

0.25 in (6.35 mm)

Supplemental

65 V

3AB

0.25 x 1.25 in (6.35 x 31.75 mm)

1.25 in (31.75 mm)

CE, UL

125 °C (257 °F)

Very Fast

0251012.PRT1L

Littelfuse

Electric Fuse

Through Hole Mount

32 V

32 V

12 A

Pin Wire

45.2 J

-55 °C (-67 °F)

Tin

50 A

10 s

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

Tape And Reel

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)

CSA; CUL; UL

125 °C (257 °F)

Very Fast

0314012.VXP

Littelfuse

Electric Fuse

Inline/Holder

250 V

125 V

12 A

End Cap

570 J

-55 °C (-67 °F)

Nickel

750 A

Rated Breaking Capacity at 125 VDC: 10000 A

570

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)

Fast

R451012.MRL

Littelfuse

Electric Fuse

Surface Mount

65 V

65 V

12 A

Wraparound

47.97 J

-55 °C (-67 °F)

Gold with Nickel barrier

50 A

451

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

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; PSE; UL

125 °C (257 °F)

Very Fast

R451012.NRL

Littelfuse

Electric Fuse

Surface Mount

65 V

65 V

12 A

Wraparound

47.97 J

-55 °C (-67 °F)

Gold with Nickel barrier

50 A

20 s

Pre Arcing Time: Open within 20 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

0251012TL

Littelfuse

Electric Fuse

Through Hole Mount

32 V

32 V

12 A

Pin Wire

45.2 J

-55 °C (-67 °F)

Matte Tin

50 A

Rated Breaking Capacity at 32 VDC: 300 A

Tape And Reel

0.095 in (2.41 mm)

e3

0.095 x 0.28 in (2.41 x 7.11 mm)

0.28 in (7.11 mm)

CSA; PSE; UL

125 °C (257 °F)

Very Fast

0251012.NRL

Littelfuse

Electric Fuse

Through Hole Mount

32 V

32 V

12 A

Pin Wire

45.2 J

-55 °C (-67 °F)

Tin

50 A

10 s

Rated Breaking Capacity at 32 VDC: 300 A

Tape And Reel

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)

CSA; UL

125 °C (257 °F)

Very Fast

0481012.HP

Littelfuse

Electric Fuse

Inline/Holder

125 V

125 V

12 A

End Cap

571.2 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

KLKD012.T

Littelfuse

Electric Fuse

Inline/Holder

600 V

600 V

12 A

End Cap

440 J

-55 °C (-67 °F)

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

0453012

Littelfuse

Electric Fuse

Surface Mount

125 V

125 V

12 A

Wraparound

47.97 J

-55 °C (-67 °F)

Silver

50 A

20 s

Rated Breaking Capacity at 24 VDC: 300 A

Tape And Reel

0.24 in (6.1 mm)

0.106 in (2.69 mm)

e4

Nano

0.106 in (2.69 mm)

CSA; PSE; UL

125 °C (257 °F)

Very Fast

0251012.HRL

Littelfuse

Electric Fuse

Through Hole Mount

32 V

32 V

12 A

Pin Wire

45.2 J

-55 °C (-67 °F)

Tin

50 A

10 s

Rated Breaking Capacity at 32 VDC: 300 A

Tape And Reel

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)

CSA; UL

125 °C (257 °F)

Very Fast

0251012.MR

Littelfuse

Electric Fuse

Through Hole Mount

32 V

32 V

12 A

Pin Wire

45.2 J

-55 °C (-67 °F)

Tin

50 A

Rated Breaking Capacity at 125 VDC: 300 A, Pre Arcing Time: Open within 10000 ms at 200% Rated Current

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; UL

125 °C (257 °F)

Very Fast

0505012.MXP

Littelfuse

Electric Fuse

Inline/Holder

450 V

250 V

12 A

End Cap

192 J

-55 °C (-67 °F)

Nickel

20 kA

10 s

Rated Breaking Capacity at 250 VDC: 1000 A

192

Bulk

0.25 in (6.35 mm)

450 V

3AB

0.25 x 1.25 in (6.35 x 31.75 mm)

1.25 in (31.75 mm)

CCC; CE; CUL; SEMKO; UL

125 °C (257 °F)

Fast

0481012.HXMP

Littelfuse

Electric Fuse

Inline/Holder

125 V

125 V

12 A

End Cap

571.2 J

-55 °C (-67 °F)

300 A

5 m

0.701 in (17.8 mm)

0.228 in (5.8 mm)

125 V

Alarm; Indicator

0.772 in (19.6 mm)

CSA; UL

125 °C (257 °F)

Fast

3412120002

Littelfuse

Electric Fuse

Inline/Holder

250 V

12 A

End Cap

380 J

-25 °C (-13 °F)

750 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)

Medium Time Lag

0JTD012.TXID

Littelfuse

Electric Fuse

Inline/Holder

600 V

300 V

12 A

End Cap

200 kA

Rated Breaking Capacity at 300 VDC: 20000 A

Bulk

0.811 in (20.6 mm)

Indicator

2.252 in (57.2 mm)

CSA; UL

Time Delay

0JTD012.T

Littelfuse

Electric Fuse

Inline/Holder

600 V

300 V

12 A

End Cap

200 kA

Rated Breaking Capacity at 300 VDC: 20000 A

Bulk

0.811 in (20.6 mm)

2.252 in (57.2 mm)

CSA; UL

Time Delay

0BLF012.T

Littelfuse

Electric Fuse

Inline/Holder

250 V

12 A

End Cap

10 kA

2 m

Bulk

0.406 in (10.31 mm)

5AG

1.5 in (38.1 mm)

CE; CSA; UL

Fast

0FLA012.V

Littelfuse

Electric Fuse

Inline/Holder

125 V

12 A

End Cap

10 kA

12 s

Bulk

0.406 in (10.31 mm)

5AG

Indicator

1.5 in (38.1 mm)

UL

Time Delay

FLA012

Littelfuse

Electric Fuse

Inline/Holder

125 V

12 A

End Cap

10 kA

12 s

Bulk

0.406 in (10.31 mm)

5AG

Indicator

1.5 in (38.1 mm)

UL

Time Delay

FLNR012.T

Littelfuse

Electric Fuse

Inline/Holder

250 V

125 V

12 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

FLSR012.TXID

Littelfuse

Electric Fuse

Inline/Holder

600 V

300 V

12 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

L15S012.T

Littelfuse

Electric Fuse

Inline/Holder

150 V

150 V

12 A

End Cap

-55 °C (-67 °F)

100 kA

Rated Breaking Capacity at 150 VDC: 20000 A

Box

0.406 in (10.3 mm)

1.5 in (38.1 mm)

CSA; UL

125 °C (257 °F)

Very Fast

L60S012.T

Littelfuse

Electric Fuse

Inline/Holder

600 V

12 A

End Cap

-55 °C (-67 °F)

200 kA

Box

0.811 in (20.6 mm)

5 in (127 mm)

CSA; UL

125 °C (257 °F)

Very Fast

KLNR0012

Littelfuse

Electric Fuse

Inline/Holder

250 V

125 V

12 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

Fast

KLSR0012

Littelfuse

Electric Fuse

Inline/Holder

600 V

250 V

12 A

End Cap

200 kA

Rated Breaking Capacity at 250 VDC: 20000 A

0.811 in (20.6 mm)

5 in (127 mm)

CE; CSA; UL

Fast

0RLS012.T

Littelfuse

Electric Fuse

Inline/Holder

600 V

12 A

End Cap

10 kA

0.811 in (20.6 mm)

5 in (127 mm)

CE; CSA; UL

LLNRK012.V

Littelfuse

Electric Fuse

Inline/Holder

250 V

125 V

12 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

0KLC012.T

Littelfuse

Electric Fuse

Inline/Holder

600 V

12 A

Tab/Blade

-55 °C (-67 °F)

200 kA

Box

0.563 in (14.3 mm)

1.874 in (47.6 mm)

CSA; UL

125 °C (257 °F)

Very Fast

LLSRK012.TXID

Littelfuse

Electric Fuse

Inline/Holder

600 V

300 V

12 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

0251012.MXT1HF

Littelfuse

Electric Fuse

Through Hole Mount

32 V

32 V

12 A

Pin Wire

45.2 J

-55 °C (-67 °F)

Matte Tin

50 A

251

Rated Breaking Capacity at 32 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; UL

125 °C (257 °F)

Very Fast

0318012.P

Littelfuse

Electric Fuse

Through Hole Mount

32 V

12 A

Pin Wire

234.6 J

-55 °C (-67 °F)

Tin

300 A

318

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)

CSA; UL

125 °C (257 °F)

Fast

0251012.MAL

Littelfuse

Electric Fuse

Through Hole Mount

32 V

32 V

12 A

Pin Wire

45.2 J

-55 °C (-67 °F)

Tin

50 A

10 s

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

Ammo Pack

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)

CSA; CUL; UL

125 °C (257 °F)

Very Fast

0253012.NRL

Littelfuse

Electric Fuse

Through Hole Mount

32 V

32 V

12 A

Pin Wire

45.2 J

-55 °C (-67 °F)

Tin

50 A

Rated Breaking Capacity at 32 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; UL

125 °C (257 °F)

Very Fast

0375012.MXBP

Littelfuse

Electric Fuse

12 A

Pin Wire

1.2 kJ

-55 °C (-67 °F)

10 kA

4 h

0.275 in (6.985 mm)

125 V

3AG

0.275 x 1.275 in (6.985 x 32.39 mm)

1.275 in (32.39 mm)

CE, CSA, UL

125 °C (257 °F)

Time Lag

0322012.MXP

Littelfuse

Electric Fuse

Inline/Holder

65 V

12 A

End Cap

38 J

-55 °C (-67 °F)

200 A

1 s

60

Bulk

0.25 in (6.35 mm)

65 V

3AB

0.25 x 1.25 in (6.35 x 31.75 mm)

1.25 in (31.75 mm)

CE; UL

125 °C (257 °F)

Very Fast

0253012.PRL

Littelfuse

Electric Fuse

Through Hole Mount

32 V

32 V

12 A

Pin Wire

45.2 J

-55 °C (-67 °F)

Tin

50 A

0253

Rated Breaking Capacity at 32 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; UL

125 °C (257 °F)

Very Fast

0215012.MXB

Littelfuse

Electric Fuse

Inline/Holder

250 V

12 A

End Cap

515.5 J

-55 °C (-67 °F)

1.5 kA

515.5

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)

125 °C (257 °F)

Time Lag

0388012.MXE

Littelfuse

Electric Fuse

Through Hole Mount

250 V

12 A

Pin Wire

490.5 J

-55 °C (-67 °F)

Tin

100 A

388

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; KTL; PSE

125 °C (257 °F)

0251012.VAT1L

Littelfuse

Electric Fuse

Through Hole Mount

32 V

32 V

12 A

Pin Wire

45.2 J

-55 °C (-67 °F)

Matte Tin

50 A

Rated Breaking Capacity at 32 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; UL

125 °C (257 °F)

Very Fast

0312012.VXP

Littelfuse

Electric Fuse

Inline/Holder

32 V

12 A

End Cap

234.6 J

-55 °C (-67 °F)

Tin

300 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)

CSA; UL

125 °C (257 °F)

Fast

SPFI012.L

Littelfuse

Electric Fuse

Inline/Holder

1 KV

12 A

End Cap

642 J

20 kA

4 m

642

Bulk

0.406 in (10.31 mm)

0.406 x 2.5 in (10.31 x 63.5 mm)

2.5 in (63.5 mm)

CE, TUV, UL

0322012.HXP

Littelfuse

Electric Fuse

Inline/Holder

65 V

65 V

12 A

End Cap

38 J

-55 °C (-67 °F)

Nickel

200 A

1 s

Rated Breaking Capacity at 65 VDC: 1000 A

60

Bulk

0.25 in (6.35 mm)

65 V

3AB

0.25 x 1.25 in (6.35 x 31.75 mm)

1.25 in (31.75 mm)

CE; UL

125 °C (257 °F)

Very Fast

0251012.MXT1L

Littelfuse

Electric Fuse

Through Hole Mount

32 V

32 V

12 A

Pin Wire

45.2 J

-55 °C (-67 °F)

Tin

50 A

10 s

Rated Breaking Capacity at 32 VDC: 300 A

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)

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.