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

    UL Class RK5 Fuses

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

    Ferrule Cartridge

    Fuse, With Blown

    Fuse Indicator

    Ferrule

    Cartridge Fuse,

    Without Blown

    Fuse Indicator

    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
     
    2 3/8" Overall Diameter
    300RK5250V AC, 250V DC200,000 amp @ 250V AC
    20,000 amp @ 250V DC
    8 5/8"2Knife BladeTime DelayNoYesUL Listed, CSA Certified
    E4273053787_C_0000000000000000000000000
    400RK5250V AC, 250V DC200,000 amp @ 250V AC
    20,000 amp @ 250V DC
    8 5/8"2Knife BladeTime DelayNoYesUL Listed, CSA Certified
    E4273053787_C_0000000000000000000000
     
    2 7/8" Overall Diameter
    600RK5250V AC, 250V DC200,000 amp @ 250V AC
    20,000 amp @ 250V DC
    10 3/8"2Knife BladeTime DelayNoYesUL Listed, CSA Certified
    E4273053787_C_00000000000000000000000
     
    Manufacturer Equivalent Fuse: FLN-R-ID, FRN-R-ID, TR-R-ID
     
    13/16" Overall Diameter
    35RK5250V AC, 250V DC200,000 amp @ 250V AC
    20,000 amp @ 250V DC
    3"2FerruleTime DelayYesYesUL Listed, CSA Certified
    E2137012636_0_000000000000000000000
    40RK5250V AC, 250V DC200,000 amp @ 250V AC
    20,000 amp @ 250V DC
    3"2FerruleTime DelayYesYesUL Listed, CSA Certified
    E2137012636_0_000000000000000000000
    45RK5250V AC, 250V DC200,000 amp @ 250V AC
    20,000 amp @ 250V DC
    3"2FerruleTime DelayYesYesUL Listed, CSA Certified
    E2137012636_0_000000000000000000000
    50RK5250V AC, 250V DC200,000 amp @ 250V AC
    20,000 amp @ 250V DC
    3"2FerruleTime DelayYesYesUL Listed, CSA Certified
    E2137012636_0_000000000000000000000
    60RK5250V AC, 250V DC200,000 amp @ 250V AC
    20,000 amp @ 250V DC
    3"2FerruleTime DelayYesYesUL Listed, CSA Certified
    E2137012636_0_000000000000000000000
     
    1 1/16" Overall Diameter
    70RK5250V AC, 250V DC200,000 amp @ 250V AC
    20,000 amp @ 250V DC
    5 7/8"2Knife BladeTime DelayYesYesUL Listed, CSA Certified
    E2137012636_0_000000000000000000000
    80RK5250V AC, 250V DC200,000 amp @ 250V AC
    20,000 amp @ 250V DC
    5 7/8"2Knife BladeTime DelayYesYesUL Listed, CSA Certified
    E2137012636_0_000000000000000000000
    90RK5250V AC, 250V DC200,000 amp @ 250V AC
    20,000 amp @ 250V DC
    5 7/8"2Knife BladeTime DelayYesYesUL Listed, CSA Certified
    E2137012636_0_000000000000000000000
    100RK5250V AC, 250V DC200,000 amp @ 250V AC
    20,000 amp @ 250V DC
    5 7/8"2Knife BladeTime DelayYesYesUL Listed, CSA Certified
    E2137012636_0_000000000000000000000
     
    1 9/16" Overall Diameter
    125RK5250V AC, 250V DC200,000 amp @ 250V AC
    20,000 amp @ 250V DC
    7 1/8"2Knife BladeTime DelayYesYesUL Listed, CSA Certified
    E2137012636_0_0000000000000000000000
    150RK5250V AC, 250V DC200,000 amp @ 250V AC
    20,000 amp @ 250V DC
    7 1/8"2Knife BladeTime DelayYesYesUL Listed, CSA Certified
    E2137012636_0_0000000000000000000000
    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 1/16" Overall Diameter
    35RK5600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    5 1/2"2FerruleTime DelayNoYesUL Listed, CSA Certified
    E4273053787_C_000000000000000000000
    40RK5600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    5 1/2"2FerruleTime DelayNoYesUL Listed, CSA Certified
    E4273053787_C_00000000000000000000
    45RK5600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    5 1/2"2FerruleTime DelayNoYesUL Listed, CSA Certified
    E4273053787_C_000000000000000000000
    50RK5600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    5 1/2"2FerruleTime DelayNoYesUL Listed, CSA Certified
    E4273053787_C_00000000000000000000
    60RK5600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    5 1/2"2FerruleTime DelayNoYesUL Listed, CSA Certified
    E4273053787_C_00000000000000000000
     

    UL Class K5 Fuses

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

    Ferrule

    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
     
    9/16" Overall Diameter
    2K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    2"1FerruleFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_000000000000000000000
    3K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    2"1FerruleFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_0000000000000000000
    4K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    2"1FerruleFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_0000000000000000000
    5K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    2"1FerruleFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_0000000000000000000
    6K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    2"1FerruleFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_0000000000000000000
    7K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    2"1FerruleFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_0000000000000000000
    8K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    2"1FerruleFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_0000000000000000000
    10K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    2"1FerruleFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_0000000000000000000
    12K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    2"1FerruleFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_0000000000000000000
    15K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    2"1FerruleFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_0000000000000000000
    20K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    2"1FerruleFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_0000000000000000000
    25K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    2"1FerruleFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_0000000000000000000
    30K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    2"1FerruleFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_0000000000000000000
     
    13/16" Overall Diameter
    35K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    3"1FerruleFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_0000000000000000000
    40K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    3"1FerruleFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_0000000000000000000
    45K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    3"1FerruleFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_0000000000000000000
    50K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    3"1FerruleFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_0000000000000000000
    60K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    3"1FerruleFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_0000000000000000000
     
    1 1/16" Overall Diameter
    70K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    5 7/8"1Knife BladeFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_000000000000000000000
    80K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    5 7/8"1Knife BladeFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_000000000000000000000
    100K5250V AC, 250V DC50,000 amp @ 250V AC
    20,000 amp @ 250V DC
    5 7/8"1Knife BladeFast ActingNoNoUL Listed, CSA Certified
    E2137012636_0_000000000000000000000
     
    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_000000000000000000000
     

    UL Class CC Time-Delay Midget Fuses for Motors

    Image of Product. Front orientation. Fuses. UL Class CC Time-Delay Midget Fuses for Motors .
    These fuses can withstand the high inrush current caused by a motor starting. They provide comparable performance with a smaller footprint than standard size fuses. All have a rejection-style end that safeguards against replacement errors. Use them to protect power distribution branch circuits. Designed for use with Fuse Blocks for UL Class CC 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: ATD-R, CCMR, LP-CC
     
    27/32" Overall Diameter
    35CC600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    1 7/8"2FerruleTime DelayNoYesUL Listed
    000000000000000000000
    40CC600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    1 7/8"2FerruleTime DelayNoYesUL Listed
    0000000000000000000
    45CC600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    1 7/8"2FerruleTime DelayNoYesUL Listed
    0000000000000000000
    50CC600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    1 7/8"2FerruleTime DelayNoYesUL Listed
    0000000000000000000
    60CC600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    1 7/8"2FerruleTime DelayNoYesUL Listed
    0000000000000000000
     

    UL Class RK1 Fast-Acting Fuses

    Image of Product. Front orientation. Fuses. UL Class RK1 Fast-Acting Fuses , Ferrule Cartridge Fuse.

    Ferrule

    Cartridge Fuse

    These fuses open circuits quickly when surges are detected. They have a rejection-style end design that safeguards against replacement errors. 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: A6K-R, KLS-R, KTS-R
     
    13/16" Overall Diameter
    1RK1600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    5"1FerruleFast ActingNoYesUL Listed, CSA Certified
    00000000000000000000
    2RK1600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    5"1FerruleFast ActingNoYesUL Listed, CSA Certified
    000000000000000000
    3RK1600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    5"1FerruleFast ActingNoYesUL Listed, CSA Certified
    000000000000000000
    4RK1600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    5"1FerruleFast ActingNoYesUL Listed, CSA Certified
    000000000000000000
    5RK1600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    5"1FerruleFast ActingNoYesUL Listed, CSA Certified
    000000000000000000
    6RK1600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    5"1FerruleFast ActingNoYesUL Listed, CSA Certified
    000000000000000000
    8RK1600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    5"1FerruleFast ActingNoYesUL Listed, CSA Certified
    000000000000000000
    10RK1600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    5"1FerruleFast ActingNoYesUL Listed, CSA Certified
    000000000000000000
    12RK1600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    5"1FerruleFast ActingNoYesUL Listed, CSA Certified
    000000000000000000
    15RK1600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    5"1FerruleFast ActingNoYesUL Listed, CSA Certified
    000000000000000000
    20RK1600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    5"1FerruleFast ActingNoYesUL Listed, CSA Certified
    000000000000000000
    25RK1600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    5"1FerruleFast ActingNoYesUL Listed, CSA Certified
    000000000000000000
    30RK1600V AC, 250V DC200,000 amp @ 600V AC
    20,000 amp @ 250V DC
    5"1FerruleFast ActingNoYesUL Listed, CSA Certified
    000000000000000000
     

    Inline Fuse Holders for Glass-Tube and Ceramic-Tube Fuses

    Image of Product. Front orientation. Fuse Holders. Inline Fuse Holders for Glass-Tube and Ceramic-Tube Fuses, Style D.

    Style D

    Add fuse protection to a single wire.
    For Fuse
    Style
    For No.
    of Fuses
    Trade
    Size
    Current,
    amp
    Overall
    Dia.
    Overall
    Lg.
    Voltage
    Wire Connection
    Method
    For Max.
    Wire Ga.
    Mounting
    Location
    Lg.
    Ht.
    Material
    Environment
    Each
    For Fuse Manufacturer Equivalent: 312, 313, 314, 322, 326, 505, ABC, AGC, GAB, GBB, GDL, GGC, GSA, MDA, MDL
    D13AB, 3AG1/10 to 201/4"1 1/4"250V AC/250V DCCrimp On12
    Inline3.22"0.8"PlasticWashdown0000000000000
     

    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 3/16" Overall Diameter
    100RK1250V AC, 250V DC300,000 amp @ 250V AC
    100,000 amp @ 250V DC
    5 7/8"2Knife BladeTime DelayNoYesUL Listed, CSA Certified
    00000000000000000000
     
    1 11/16" Overall Diameter
    125RK1250V AC, 250V DC300,000 amp @ 250V AC
    100,000 amp @ 250V DC
    7 1/8"2Knife BladeTime DelayNoYesUL Listed, CSA Certified
    0000000000000000000
    200RK1250V AC, 250V DC300,000 amp @ 250V AC
    100,000 amp @ 250V DC
    7 1/8"2Knife BladeTime DelayNoYesUL Listed, CSA Certified
    000000000000000000
     
    2 3/8" Overall Diameter
    400RK1250V AC, 250V DC300,000 amp @ 250V AC
    100,000 amp @ 250V DC
    8 5/8"2Knife BladeTime DelayNoYesUL Listed, CSA Certified
    00000000000000000000
     

    DIN-Rail/Surface-Mount Fuse Blocks

    Image of Product. For 1 Fuse. Front orientation. Fuse Blocks. DIN-Rail/Surface-Mount Fuse Blocks, For 1 Fuses.
    Image of Product. Front orientation. Fuse Blocks. DIN-Rail/Surface-Mount Fuse Blocks, For 2 Fuses.
    Image of Product. Front orientation. Fuse Blocks. DIN-Rail/Surface-Mount Fuse Blocks, For 3 Fuses.

    For 1 Fuse

    For 2 Fuses

    For 3 Fuses

    Fuse blocks have a universal hole pattern, so they can be mounted on either DIN-rail or directly onto surfaces.
    For Fuse
    For No.
    of Fuses
    UL
    Class
    Current,
    amp
    Type
    Voltage
    Wire Connection
    For DIN
    Rail Size, mm
    Certification
    Each
    For Fuse Manufacturer Equivalent: A2D-R, FLN-R, FRN-R, LLN-RK, LPN-RK, TR-R
    1RK1, RK51 to 30Cartridge250V AC/250V DCBox-Lug Terminal35UL Listed, CSA Certified
    0000000000000
    1RK1, RK531 to 60Cartridge250V AC/250V DCBox-Lug Terminal35UL Listed, CSA Certified
    000000000000
    2RK1, RK51 to 30Cartridge250V AC/250V DCBox-Lug Terminal35UL Listed, CSA Certified
    000000000000
    2RK1, RK531 to 60Cartridge250V AC/250V DCBox-Lug Terminal35UL Listed, CSA Certified
    000000000000
    3RK1, RK51 to 30Cartridge250V AC/250V DCBox-Lug Terminal35UL Listed, CSA Certified
    000000000000
    3RK1, RK531 to 60Cartridge250V AC/250V DCBox-Lug Terminal35UL Listed, CSA Certified
    000000000000
     
    back to top