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
Termination Style
Fuse Type
Fuse Size / Group
Indicator Style
Packaging
Littelfuse Specialty Fuses 300A 600VAC VDC FF KLC POWR-SPEED
Datasheet
Non-Stocked Lead-Time 13 Weeks
Min.: 1
Mult.: 1

KLC Specialty Fuses Cartridge Blade Fuses 300 A 600 VAC 200 kA at 600 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 350A 600VAC VDC FF KLC POWR-SPEED
Datasheet
Non-Stocked Lead-Time 13 Weeks
Min.: 1
Mult.: 1

KLC Specialty Fuses Cartridge Blade Fuses 350 A 600 VAC 200 kA at 600 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 400A 600VAC VDC FF KLC POWR-SPEED
Datasheet
Non-Stocked Lead-Time 13 Weeks
Min.: 1
Mult.: 1

KLC Specialty Fuses Cartridge Blade Fuses 400 A 600 VAC 200 kA at 600 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 450A 600VAC VDC FF KLC POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

KLC Specialty Fuses Cartridge Blade Fuses 450 A 600 VAC 200 kA at 600 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 500A 600VAC VDC FF KLC POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

KLC Specialty Fuses Cartridge Blade Fuses 500 A 600 VAC 200 kA at 600 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 600A 600VAC VDC FF KLC POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

KLC Specialty Fuses Cartridge Blade Fuses 600 A 600 VAC 200 kA at 600 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 700A 600VAC VDC FF KLC POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

KLC Specialty Fuses Cartridge Blade Fuses 700 A 600 VAC 200 kA at 600 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 800A 600VAC VDC FF KLC POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

KLC Specialty Fuses Cartridge Blade Fuses 800 A 600 VAC 200 kA at 600 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 20A 150VAC 150VDC FF L15S POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

L15S Specialty Fuses Round Body Blade Fuses 20 A 150 VAC 150 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow 5AG Without Indicator Bulk
Littelfuse Specialty Fuses 35A 150VAC 150VDC FF L15S POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

L15S Specialty Fuses Round Body Blade Fuses 35 A 150 VAC 150 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 40A 150VAC 150VDC FF L15S POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

L15S Specialty Fuses Round Body Blade Fuses 40 A 150 VAC 150 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 45A 150VAC 150VDC FF L15S POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

L15S Specialty Fuses Round Body Blade Fuses 45 A 150 VAC 150 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 100A 150VAC 100VDC FF L15S POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

L15S Specialty Fuses Round Body Blade Fuses 100 A 150 VAC 100 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow 5AG Without Indicator Bulk
Littelfuse Specialty Fuses 10A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

L50S Specialty Fuses Round Body Blade Fuses 10 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 550A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

L50S Specialty Fuses Round Body Blade Fuses 550 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 700A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

L50S Specialty Fuses Round Body Blade Fuses 700 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 1A 600VAC VDC FF L60S POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1
No
L60S Specialty Fuses Cartridge Fuses 1 A 600 VAC 200 kA at 600 VAC Holder Clip Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 2A 600VAC VDC FF L60S POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1
No
L60S Specialty Fuses Cartridge Fuses 2 A 600 VAC 200 kA at 600 VAC Holder Clip Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 3A 600VAC VDC FF L60S POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1
No
L60S Specialty Fuses Cartridge Fuses 3 A 600 VAC 200 kA at 600 VAC Holder Clip Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 4A 600VAC VDC FF L60S POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1
No
L60S Specialty Fuses Cartridge Fuses 4 A 600 VAC 200 kA at 600 VAC Holder Clip Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 5A 600VAC VDC FF L60S POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1
No
L60S Specialty Fuses Cartridge Fuses 5 A 600 VAC 200 kA at 600 VAC Holder Clip Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 6A 600VAC VDC FF L60S POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1
No
L60S Specialty Fuses Cartridge Fuses 6 A 600 VAC 200 kA at 600 VAC Holder Clip Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 8A 600VAC VDC FF L60S POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1
No
L60S Specialty Fuses Cartridge Fuses 8 A 600 VAC 200 kA at 600 VAC Holder Clip Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 12A 600VAC VDC FF L60S POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1
No
L60S Specialty Fuses Cartridge Fuses 12 A 600 VAC 200 kA at 600 VAC Holder Clip Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 25A 600VAC VDC FF L60S POWR-SPEED
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1
No
L60S Specialty Fuses Cartridge Fuses 25 A 600 VAC 200 kA at 600 VAC Holder Clip Fast Blow Without Indicator Bulk