Fast-Acting High-Speed Fuses

Littelfuse Fast-Acting High-Speed Fuses are designed to protect equipment and systems. These fast-acting fuses feature Littelfuse-developed technology that sets standards for accuracy, consistent quality, reliability, and predictable performance. Littelfuse Fast-Acting High-Speed Fuses are optimized for performance and efficiency to better protect critical power semiconductors against short circuits.

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Qty. RoHS ECAD Model Series
Product
Body Style
Current Rating
Voltage Rating AC
Voltage Rating DC
Interrupt Rating
Mounting Style
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Fuse Type
Fuse Size/Group
Indicator Style
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Littelfuse Specialty Fuses 20A 600VAC VDC FF KLC POWR-SPEED
Datasheet
6Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

KLC Specialty Fuses Cartridge Blade Fuses 20 A 600 VAC 200 kA at 600 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 40A 600VAC VDC FF KLC POWR-SPEED
Datasheet
16Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

KLC Specialty Fuses Cartridge Blade Fuses 40 A 600 VAC 200 kA at 600 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 45A 600VAC VDC FF KLC POWR-SPEED
Datasheet
5Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

KLC Specialty Fuses Cartridge Blade Fuses 45 A 600 VAC 200 kA at 600 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 50A 150VAC 150VDC FF L15S POWR-SPEED
Datasheet
5Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L15S Specialty Fuses Round Body Blade Fuses 50 A 150 VAC 150 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 60A 150VAC 150VDC FF L15S POWR-SPEED
Datasheet
3Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L15S Specialty Fuses Round Body Blade Fuses 60 A 150 VAC 150 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 70A 150VAC 100VDC FF L15S POWR-SPEED
Datasheet
31Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L15S Specialty Fuses Round Body Blade Fuses 70 A 150 VAC 100 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 80A 150VAC 100VDC FF L15S POWR-SPEED
Datasheet
25Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L15S Specialty Fuses Round Body Blade Fuses 80 A 150 VAC 100 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 90A 150VAC 100VDC FF L15S POWR-SPEED
Datasheet
130Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L15S Specialty Fuses Round Body Blade Fuses 90 A 150 VAC 100 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 125A 150VAC 100VDC FF L15S POWR-SPEED
Datasheet
64Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L15S Specialty Fuses Round Body Blade Fuses 125 A 150 VAC 100 VDC 100 kA at 150 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 200A 150VAC 100VDC FF L15S POWR-SPEED
Datasheet
74Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L15S Specialty Fuses Round Body Blade Fuses 200 A 150 VAC 100 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 400A 150VAC 100VDC FF L15S POWR-SPEED
Datasheet
1Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L15S Specialty Fuses Round Body Blade Fuses 400 A 150 VAC 100 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 450A 150VAC 100VDC FF L15S POWR-SPEED
Datasheet
6Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L15S Specialty Fuses Round Body Blade Fuses 450 A 150 VAC 100 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 600A 150VAC 100VDC FF L15S POWR-SPEED
Datasheet
15Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L15S Specialty Fuses Round Body Blade Fuses 600 A 150 VAC 100 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 12A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
5Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L50S Specialty Fuses Round Body Blade Fuses 12 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 15A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
7Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L50S Specialty Fuses Round Body Blade Fuses 15 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 175A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
281Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L50S Specialty Fuses Round Body Blade Fuses 175 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 275A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
18Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L50S Specialty Fuses Round Body Blade Fuses 275 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 600A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
1Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L50S Specialty Fuses Round Body Blade Fuses 600 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 10A 600VAC VDC FF L60S POWR-SPEED
Datasheet
8Factory Stock Available
More Info Available
Min.: 1
Mult.: 1
No
L60S Specialty Fuses Cartridge Fuses 10 A 600 VAC 200 kA at 600 VAC Holder Clip Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 15A 600VAC VDC FF L60S POWR-SPEED
Datasheet
34Factory Stock Available
More Info Available
Min.: 1
Mult.: 1
No
L60S Specialty Fuses Cartridge Fuses 15 A 600 VAC 200 kA at 600 VAC Holder Clip Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 20A 600VAC VDC FF L60S POWR-SPEED
Datasheet
3Factory Stock Available
More Info Available
Min.: 1
Mult.: 1
No
L60S Specialty Fuses Cartridge Fuses 20 A 600 VAC 200 kA at 600 VAC Holder Clip Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 30A 600VAC VDC FF L60S POWR-SPEED
Datasheet
32Factory Stock Available
More Info Available
Min.: 1
Mult.: 1
No
L60S Specialty Fuses Cartridge Fuses 30 A 600 VAC 200 kA at 600 VAC Holder Clip Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 35A 600VAC VDC FF L60S POWR-SPEED
Datasheet
29Factory Stock Available
More Info Available
Min.: 1
Mult.: 1
No
L60S Specialty Fuses Cartridge Fuses 35 A 600 VAC 200 kA at 600 VAC Holder Clip Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 40A 600VAC VDC FF L60S POWR-SPEED
Datasheet
6Factory Stock Available
More Info Available
Min.: 1
Mult.: 1
No
L60S Specialty Fuses Cartridge Fuses 40 A 600 VAC 200 kA at 600 VAC Holder Clip Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 45A 600VAC VDC FF L60S POWR-SPEED
Datasheet
34Factory Stock Available
More Info Available
Min.: 1
Mult.: 1
No
L60S Specialty Fuses Cartridge Fuses 45 A 600 VAC 200 kA at 600 VAC Holder Clip Fast Blow Without Indicator Bulk