McMaster-Carr logo
    Filter by
    Fuse UL Class
    Fuse Protection Type
    Cartridge Fuse Type
    With Blown Fuse Indicator
    Number of Elements
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    DFARS Specialty Metals
    Rejection-Style End
    UL File Number
    Indicator Type
    Overall Width
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    26 Products

    UL Class RK5 Fuses

    Image of Product. Front orientation. Fuses. UL Class RK5 Fuses , Knife-Blade Cartridge Fuse, With Blown Fuse Indicator.
    Image of Product. Front orientation. Fuses. UL Class RK5 Fuses , Knife-Blade Cartridge Fuse, Without Blown Fuse Indicator.

    Knife-Blade Cartridge

    Fuse, With Blown Fuse

    Indicator

    Knife-Blade Cartridge

    Fuse, Without Blown

    Fuse Indicator

    Also known as dual-element fuses, these time-delay fuses withstand current overload for a short time so they won't open when exposed to harmless temporary surges, such as when starting a motor. They have a rejection-style end design that safeguards against replacement errors. Use with Fuse Blocks for UL Class RK5 Fuses.
    With Blown Fuse Indicator—Fuses with blown fuse indicator have a dot on the side that changes color when the fuse blows.
    Breakthrough Current @ Voltage—Breakthrough current at voltage, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.
    Each
    Current,
    amp
    Fuse UL
    Class
    Voltage
    Breakthrough Current @ Voltage
    Overall
    Lg.
    No. of
    Elements
    Cartridge
    Fuse Type
    Fuse Protection
    Type
    With Blown Fuse
    Indicator
    Rejection-Style
    End
    Certification
    UL File
    No.
    CSA File
    No.
    1-9
    10-Up
    Manufacturer Equivalent Fuse: FLN-R, FRN-R, TR-R
     
    1 9/16" Overall Diameter
    200RK5250V AC, 125V DC200,000 amp @ 250V AC
    20,000 amp @ 125V DC
    7 1/8"2Knife BladeTime DelayNoYesUL Listed, CSA Certified
    E4273053787_C_00000000000000000000000
     
    Manufacturer Equivalent Fuse: FLN-R-ID, FRN-R-ID, TR-R-ID
     
    1 9/16" Overall Diameter
    200RK5250V AC, 250V DC200,000 amp @ 250V AC
    20,000 amp @ 250V DC
    7 1/8"2Knife BladeTime DelayYesYesUL Listed, CSA Certified
    E2137012636_0_0000000000000000000000
     
    Manufacturer Equivalent Fuse: FLS-R, FRS-R, TRS-R
     
    1 5/8" Overall Diameter
    200RK5600V AC, 300V DC200,000 amp @ 600V AC
    20,000 amp @ 300V DC
    9 5/8"2Knife BladeTime DelayNoYesUL Listed, CSA Certified
    E4273053787_C_0000000000000000000000
     
    Manufacturer Equivalent Fuse: FRS-R-ID, IDSR, TRS-R-ID
     
    1 13/16" Overall Diameter
    200RK5600V AC, 600V DC200,000 amp @ 600V AC
    20,000 amp @ 600V DC
    9 5/8"2Knife BladeTime DelayYesYesUL Listed, CSA Certified
    E2137012636_0_00000000000000000000000
     

    UL Class J Time-Delay Fuses for Tight Spaces

    Image of Product. Front orientation. Fuses. UL Class J Time-Delay Fuses for Tight Spaces , Knife-Blade Cartridge Fuse, With Blown Fuse Indicator.
    Image of Product. Front orientation. Fuses. UL Class J Time-Delay Fuses for Tight Spaces , Knife-Blade Cartridge Fuse, Without Blown Fuse Indicator.

    Knife-Blade

    Cartridge Fuse,

    With Blown Fuse

    Indicator

    Knife-Blade

    Cartridge Fuse,

    Without Blown Fuse

    Indicator

    Also known as dual-element fuses, these fuses withstand current overload for a short time so they won't open when exposed to harmless temporary surges, such as when starting a motor. More compact than UL Class RK1 or RK5 fuses, they are suitable for tight spaces. Use with Fuse Blocks for UL Class J Fuses.
    With Blown Fuse Indicator—Fuses with blown fuse indicator have a dot on the side that changes color when the fuse blows.
    Breakthrough Current @ Voltage—Breakthrough current at voltage, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.
    Each
    Current,
    amp
    Fuse UL
    Class
    Voltage
    Breakthrough Current @ Voltage
    Overall
    Lg.
    No. of
    Elements
    Cartridge
    Fuse Type
    Fuse Protection
    Type
    With Blown Fuse
    Indicator
    Rejection-Style
    End
    Certification
    1-9
    10-Up
    Manufacturer Equivalent Fuse: AJT, JTD, LPJ-SP
     
    1 5/8" Overall Diameter
    200J600V AC, 300V DC300,000 amp @ 600V AC
    100,000 amp @ 300V DC
    5 3/4"2Knife BladeTime DelayNoNoUL Listed, CSA Certified
    0000000000000000000000
     
    Manufacturer Equivalent Fuse: AJT, JTD-ID, LPJ-SPI
     
    1 5/8" Overall Diameter
    200J600V AC, 400V DC200,000 amp @ 600V AC
    100,000 amp @ 400V DC
    5 3/4"4Knife BladeTime DelayYesNoUL Listed, CSA Certified
    0000000000000000000
     

    Fast-Acting Lift Truck Fuses

    Image of Product. Front orientation. Fuses. Fast-Acting Lift Truck Fuses .
    These fuses open circuits quickly when surges are detected. Use them on battery-operated lift trucks.
    With Blown Fuse Indicator—Fuses with blown fuse indicator have a dot on the side that changes color when the fuse blows.
    Breakthrough Current @ Voltage—Breakthrough current at voltage, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.
    Fuses
    Fuse Holders
    Overall
    Current,
    amp
    Voltage
    Breakthrough Current @ Voltage
    Lg.
    Wd.
    No. of
    Elements
    Fuse Protection
    Type
    With Blown Fuse
    Indicator
    Certification
    Each
    Each
    Manufacturer Equivalent Fuse: AFX, ALS
     
    1 1/8" Overall Diameter
    200125V AC, 125V DC10,000 amp @ 125V AC
    10,000 amp @ 125V DC
    4 3/4"1Fast ActingNoUL Recognized Component
    0000000000000———0
     
    Manufacturer Equivalent Fuse: ANN, CNN
    200125V AC, 80V DC2,500 amp @ 125V AC
    2,700 amp @ 80V DC
    3 3/16"7/8"1Fast ActingYesUL Recognized Component
    0000000000000000000000000000
     

    UL Class T Fuses for Extra-Tight Spaces

    Image of Product. Front orientation. Fuses. UL Class T Fuses for Extra-Tight Spaces , Knife-Blade Cartridge Fuse.

    Knife-Blade

    Cartridge Fuse

    Smaller than UL Class J fuses, these fast-acting fuses can be used in extra-tight spaces such as meters, uninterruptible power supplies, and variable-speed drives. They open circuits quickly when surges are detected. Use with Fuse Blocks for UL Class T Fuses.
    Breakthrough Current @ Voltage—Breakthrough current at voltage, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.
    Each
    Current,
    amp
    Fuse UL
    Class
    Voltage
    Breakthrough Current @ Voltage
    Overall
    Lg.
    No. of
    Elements
    Cartridge
    Fuse Type
    Fuse Protection
    Type
    With Blown Fuse
    Indicator
    Rejection-Style
    End
    Certification
    1-9
    10-Up
    Manufacturer Equivalent Fuse: A3T, JJN, JLLN
     
    7/8" Overall Diameter
    200T300V AC, 160V DC200,000 amp @ 300V AC
    20,000 amp @ 160V DC
    2 7/16"1Knife BladeFast ActingNoNoUL Listed, CSA Certified, CE Marked
    00000000000000000000
     
    Manufacturer Equivalent Fuse: A6T, JJS, JLLS
     
    7/8" Overall Diameter
    200T600V AC200,000 amp @ 600V AC3 1/4"1Knife BladeFast ActingNoNoUL Listed, CSA Certified, CE Marked
    0000000000000000000
     

    UL Class J Fast-Acting Fuses for Tight Spaces

    Image of Product. Front orientation. Fuses. UL Class J Fast-Acting Fuses for Tight Spaces , Knife-Blade Cartridge Fuse.

    Knife-Blade

    Cartridge Fuse

    These fuses open circuits quickly when surges are detected. More compact than UL Class RK1 or RK5 fuses, they are suitable for tight spaces. Use with Fuse Blocks for UL Class J Fuses.
    Breakthrough Current @ Voltage—Breakthrough current at voltage, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.
    Each
    Current,
    amp
    Fuse UL
    Class
    Voltage,
    V AC
    Breakthrough Current
    @ Voltage
    Overall
    Lg.
    No. of
    Elements
    Cartridge
    Fuse Type
    Fuse Protection
    Type
    With Blown Fuse
    Indicator
    Rejection-Style
    End
    Certification
    UL File
    No.
    1-9
    10-Up
    Manufacturer Equivalent Fuse: A4J, JKS, JLS
     
    1 5/8" Overall Diameter
    200J600200,000 amp @ 600V AC5 3/4"1Knife BladeFast ActingNoNoUL Listed, CSA Certified
    E4273000000000000000000000
     

    UL Class RK1 Time-Delay Fuses

    Image of Product. Front orientation. Fuses. UL Class RK1 Time-Delay Fuses , Knife-Blade Cartridge Fuse.

    Knife-Blade

    Cartridge Fuse

    Also known as dual-element fuses, these fuses withstand current overload for a short time so they won't open when exposed to harmless temporary surges, such as when starting a motor. They have a rejection-style end design that safeguards against replacement errors. Designed for use with Fuse Blocks for UL Class RK1 Fuses.
    Breakthrough Current @ Voltage—Breakthrough current at voltage, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.
    Each
    Current,
    amp
    Fuse UL
    Class
    Voltage
    Breakthrough Current @ Voltage
    Overall
    Lg.
    No. of
    Elements
    Cartridge
    Fuse Type
    Fuse Protection
    Type
    With Blown Fuse
    Indicator
    Rejection-Style
    End
    Certification
    1-9
    10-Up
    Manufacturer Equivalent Fuse: A2D-R, LLN-RK, LPN-RK
     
    1 11/16" Overall Diameter
    200RK1250V AC, 250V DC300,000 amp @ 250V AC
    100,000 amp @ 250V DC
    7 1/8"2Knife BladeTime DelayNoYesUL Listed, CSA Certified
    00000000000000000000
     
    Manufacturer Equivalent Fuse: A6D-R, LLS-RK, LPS-RK
     
    1 11/16" Overall Diameter
    200RK1600V AC, 300V DC300,000 amp @ 600V AC
    100,000 amp @ 300V DC
    9 5/8"2Knife BladeTime DelayNoYesUL Listed, CSA Certified
    00000000000000000000
     

    High-Current Automotive Fuses

    Image of Product. Front orientation. Fuses. High-Current Automotive Fuses .
    Suitable for battery and alternator circuit protection, these fuses can handle higher current than standard automotive fuses.
    Breakthrough Current @ Voltage—Breakthrough current at voltage, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.
    Fuses
    Fuse Holders
    Overall
    Each
    Current,
    amp
    Voltage,
    V DC
    Breakthrough Current
    @ Voltage
    Lg.
    Wd.
    No. of
    Elements
    Fuse Protection
    Type
    With Blown Fuse
    Indicator
    1-9
    10-Up
    Each
    Manufacturer Equivalent Fuse: MEGA
    200322,000 amp @ 32V DC2.7"3/4"1Time DelayNo0000000000000000000000000000
     

    UL Class K5 Fuses

    Image of Product. Front orientation. Fuses. UL Class K5 Fuses , Knife-Blade Cartridge Fuse.

    Knife-Blade

    Cartridge Fuse

    Use these fast-acting fuses in applications where temporary overload current is not present, such as in lighting and heating. They open circuits quickly when surges are detected. Use with Fuse Blocks for UL Class K5 Fuses.
    Breakthrough Current @ Voltage—Breakthrough current at voltage, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.
    Each
    Current,
    amp
    Fuse UL
    Class
    Voltage
    Breakthrough Current @ Voltage
    Overall
    Lg.
    No. of
    Elements
    Cartridge
    Fuse Type
    Fuse Protection
    Type
    With Blown Fuse
    Indicator
    Rejection-Style
    End
    Certification
    UL File
    No.
    CSA File
    No.
    1-9
    10-Up
    Manufacturer Equivalent Fuse: NLN, NON, OT
     
    1 9/16" Overall Diameter
    200K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    7 1/8"1Knife BladeFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_00000000000000000000000
     
    Manufacturer Equivalent Fuse: NLS, NOS, OTS
     
    1 13/16" Overall Diameter
    200K5600V AC, 300V DC50,000 amp @ 600V AC
    20,000 amp @ 300V DC
    9 5/8"1Knife BladeFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_000000000000000000000
     

    Fuses for Sensitive Electronics

    Image of Product. Front orientation. Fuses. Fuses for Sensitive Electronics , Knife-Blade Cartridge Fuse.

    Knife-Blade

    Cartridge Fuse

    With a quicker response than standard fast-acting fuses, these fuses provide the best protection for sensitive electronics.
    Breakthrough Current @ Voltage—Breakthrough current at voltage, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.
    Current,
    amp
    Voltage,
    V AC
    Breakthrough Current
    @ Voltage
    Overall
    Lg.
    No. of
    Elements
    Cartridge
    Fuse Type
    Fuse Protection
    Type
    With Blown Fuse
    Indicator
    Rejection-Style
    End
    Certification
    Each
    Manufacturer Equivalent Fuse: A15QS, FWA, L15S
     
    1 1/8" Overall Diameter
    200150100,000 amp @ 150V AC2 11/16"1Knife BladeFast ActingNoNoUL Recognized Component
    00000000000000
     
    Manufacturer Equivalent Fuse: A30QS, FWX, L25S
     
    1 1/4" Overall Diameter
    200250200,000 amp @ 250V AC3 1/8"1Knife BladeFast ActingNoNoUL Recognized Component
    00000000000000
     
    Manufacturer Equivalent Fuse: A50QS, FWH, L50S
     
    1 3/16" Overall Diameter
    200500200,000 amp @ 500V AC3 5/8"1Knife BladeFast ActingNoNoUL Recognized Component
    00000000000000
     

    UL Class H Replaceable-Element Fuses

    Image of Product. Front orientation. Fuses. UL Class H Replaceable-Element Fuses , Knife-Blade Cartridge Fuse.

    Knife-Blade

    Cartridge Fuse

    Replace the current-carrying element rather than the entire fuse after the fuse breaks. Use with Fuse Blocks for UL Class H Fuses.
    Breakthrough Current @ Voltage—Breakthrough current at voltage, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.
    Fuses
    Replacement
    Fuse Elements
    Current,
    amp
    Fuse UL
    Class
    Voltage,
    V AC
    Breakthrough Current
    @ Voltage
    Overall
    Lg.
    No. of
    Elements
    Cartridge
    Fuse Type
    Fuse Protection
    Type
    With Blown Fuse
    Indicator
    Rejection-Style
    End
    Certification
    Each
    Pkg.
    Qty.
    Pkg.
    Manufacturer Equivalent Fuse: REN, RF, RLN
     
    1 9/16" Overall Diameter
    200H25010,000 amp @ 250V AC7 1/8"1Knife BladeFast ActingNoNoUL Listed
    000000000000000200000000000000
     
    Manufacturer Equivalent Fuse: RES, RFS, RLS
     
    1 13/16" Overall Diameter
    200H60010,000 amp @ 600V AC9 5/8"1Knife BladeFast ActingNoNoUL Listed
    0000000000000020000000000000
     

    Replacement Elements for UL Class H Fuses

    Image of Product. Front orientation. Fuse Elements. Replacement Elements for UL Class H Fuses.
    Breakthrough current, labeled on your fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.
    Current,
    amp
    Voltage,
    V AC
    Breakthrough Current
    @ Voltage
    Fuse Protection
    Type
    Pkg.
    Qty.
    Pkg.
    20025010,000 amp @ 250V ACFast Acting200000000000000
    20060010,000 amp @ 600V ACFast Acting20000000000000

    Time-Delay Lift Truck Fuses

    Image of Product. Front orientation. Fuses. Time-Delay Lift Truck Fuses .
    Able to withstand current overload for a short time, these fuses will not open when exposed to harmless temporary surges, such as when starting a motor. Use these fuses on battery-operated lift trucks.
    Breakthrough Current @ Voltage—Breakthrough current at voltage, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.
    Current,
    amp
    Voltage
    Breakthrough Current @ Voltage
    Overall
    Lg.
    No. of
    Elements
    Fuse Protection
    Type
    With Blown Fuse
    Indicator
    Certification
    Each
    Manufacturer Equivalent Fuse: ACK, CCK
     
    1 1/8" Overall Diameter
    200125V AC, 125V DC10,000 amp @ 125V AC
    10,000 amp @ 125V DC
    4 3/4"1Time DelayNoUL Recognized Component
    0000000000000
     
    back to top