100 Amp Fuses | McMaster-Carr

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About Fuses

Knife-Blade Style

Knife-Blade Style with 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.

Breakthrough current, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.

Fuses with blown fuse indicator have a dot on the side that changes color when the fuse blows.

			Overall									Each
Current, A	Voltage	Breakthrough Current	Lg.	Dia.	No. of Elements	Cartridge Fuse Style	Blown Fuse Indicator	Specifications Met	UL File Number	CSA File Number		1-9	10-Up
Manufacturer Equivalent: FLN-R, FRN-R, TR-R
100	250V AC	200,000 A @ 250 V AC	5 7/8"	1 1/16"	2	Knife Blade	No	UL Listed, CSA Certified	E4273	053787_C_000	0000000	000000	000000
Manufacturer Equivalent: FLN-R-ID, FRN-R-ID, TR-R-ID
100	250V DC/250V AC	20,000 A @ 250 V DC 200,000 A @ 250 V AC	5 7/8"	1 1/16"	2	Knife Blade	Yes	UL Listed, CSA Certified	E2137	012636_0_000	00000000	00000	00000
Manufacturer Equivalent: FLS-R, FRS-R, TRS-R
100	600V AC/300V DC	20,000 A @ 300 V DC 200,000 A @ 600 V AC	7 7/8"	1 1/8"	2	Knife Blade	No	UL Listed, CSA Certified	E4273	053787_C_000	000000	00000	00000
Manufacturer Equivalent: FRS-R-ID, IDSR, TRS-R-ID
100	600V DC/600V AC	20,000 A @ 600 V DC 200,000 A @ 600 V AC	7 7/8"	1 5/16"	2	Knife Blade	Yes	UL Listed, CSA Certified	E2137	012636_0_000	00000000	00000	00000

UL Class J Time-Delay Fuses for Tight Spaces

Knife-Blade Style

Knife-Blade Style with 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.

Breakthrough current, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.

Fuses with blown fuse indicator have a dot on the side that changes color when the fuse blows.

For technical drawings and 3-D models, click on a part number.

			Overall							Each
Current, A	Voltage	Breakthrough Current	Lg.	Dia.	No. of Elements	Cartridge Fuse Style	Blown Fuse Indicator	Specifications Met		1-9	10-Up
Manufacturer Equivalent: AJT, JTD, LPJ-SP
100	600V AC/300V DC	100,000 A @ 300 V DC 300,000 A @ 600 V AC	4 5/8"	1 1/8"	2	Knife Blade	No	UL Listed, CSA Certified	000000000	0000000	000000
Manufacturer Equivalent: AJT, JTD-ID, LPJ-SPI
100	600V AC/400V DC	100,000 A @ 400 V DC 200,000 A @ 600 V AC	4 5/8"	1 1/16"	2	Knife Blade	Yes	UL Listed, CSA Certified	0000000	00000	00000

UL Class J Fast-Acting Fuses for Tight Spaces

Knife-Blade Style

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, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.

For technical drawings and 3-D models, click on a part number.

			Overall						Each
Current, A	Voltage	Breakthrough Current	Lg.	Dia.	No. of Elements	Cartridge Fuse Style	Specifications Met		1-9	10-Up
Manufacturer Equivalent: A4J, JKS, JLS
100	600V AC	200,000 A @ 600 V AC	4 5/8"	1 1/8"	1	Knife Blade	UL Listed, CSA Certified	00000000	000000	000000

UL Class RK1 Time-Delay Fuses

Knife-Blade Style

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, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.

			Overall						Each
Current, A	Voltage	Breakthrough Current	Lg.	Dia.	No. of Elements	Cartridge Fuse Style	Specifications Met		1-9	10-Up
Manufacturer Equivalent: A2D-R, LLN-RK, LPN-RK
100	250V DC/250V AC	100,000 A @ 250 V DC 300,000 A @ 250 V AC	5 7/8"	1 3/16"	2	Knife Blade	UL Listed, CSA Certified	00000000	000000	000000
Manufacturer Equivalent: A6D-R, LLS-RK, LPS-RK
100	600V AC/300V DC	100,000 A @ 300 V DC 300,000 A @ 600 V AC	7 7/8"	1 3/16"	2	Knife Blade	UL Listed, CSA Certified	00000000	00000	00000

UL Class RK1 Fast-Acting Fuses

Knife-Blade Style

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, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.

For technical drawings and 3-D models, click on a part number.

			Overall						Each
Current, A	Voltage	Breakthrough Current	Lg.	Dia.	No. of Elements	Cartridge Fuse Style	Specifications Met		1-9	10-Up
Manufacturer Equivalent: A6K-R, KLS-R, KTS-R
100	600V AC/300V DC	20,000 A @ 300 V DC 200,000 A @ 600 V AC	7 7/8"	1 5/16"	1	Knife Blade	UL Listed, CSA Certified	00000000	0000000	0000000

UL Class K5 Fuses

Knife-Blade Style

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, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.

For technical drawings and 3-D models, click on a part number.

			Overall						Each
Current, A	Voltage	Breakthrough Current	Lg.	Dia.	No. of Elements	Cartridge Fuse Style	Specifications Met		1-9	10-Up
Manufacturer Equivalent: NLN, NON, OT
100	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	5 7/8"	1 1/16"	1	Knife Blade	UL Listed, CSA Certified	00000000	000000	000000
Manufacturer Equivalent: NLS, NOS, OTS
100	600V AC/300V DC	20,000 A @ 300 V DC 50,000 A @ 600 V AC	7 7/8"	1 5/16"	1	Knife Blade	UL Listed, CSA Certified	00000000	00000	00000

UL Class T Fuses for Extra-Tight Spaces

Knife-Blade Style

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, also known as interrupt current, is the maximum current that a fuse can safely stop in the event of a short circuit.

For technical drawings and 3-D models, click on a part number.

			Overall						Each
Current, A	Voltage	Breakthrough Current	Lg.	Dia.	No. of Elements	Cartridge Fuse Style	Specifications Met		1-9	10-Up
Manufacturer Equivalent: A3T, JJN, JLLN
100	300V AC/160V DC	20,000 A @ 160 V DC 200,000 A @ 300 V AC	2 3/16"	3/4"	1	Knife Blade	UL Listed, CSA Certified, CE Marked	00000000	000000	000000
Manufacturer Equivalent: A6T, JJS, JLLS
100	600V AC	200,000 A @ 600 V AC	2 15/16"	3/4"	1	Knife Blade	UL Listed, CSA Certified, CE Marked	00000000	00000	00000

UL Class H Replaceable-Element Fuses

Knife-Blade Style

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, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.

For technical drawings and 3-D models, click on a part number.

Fuses
			Overall								Replacement Elements
Current, A	Voltage	Breakthrough Current	Lg.	Dia.	No. of Elements	Cartridge Fuse Style	Protection Type	Specifications Met		Each	Pkg. Qty.		Pkg.
Manufacturer Equivalent: REN, RF, RLN
100	250V AC	10,000 A @ 250 V AC	5 7/8"	1 1/16"	1	Knife Blade	Fast Acting	UL Listed	00000000	000000	2	00000000	000000
Manufacturer Equivalent: RES, RFS, RLS
100	600V AC	10,000 A @ 600 V AC	7 7/8"	1 5/16"	1	Knife Blade	Fast Acting	UL Listed	00000000	000000	2	00000000	00000

Replacement Elements for UL Class H Replaceable-Element 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.

For technical drawings and 3-D models, click on a part number.

Current, A	Voltage	Breakthrough Current	Protection Type	Pkg. Qty.		Pkg.
100	250V AC	10,000 A @ 250 V AC	Fast Acting	2	00000000	000000
100	600V AC	10,000 A @ 600 V AC	Fast Acting	2	00000000	00000

Fuses for Sensitive Electronics

Knife-Blade Style

With a quicker response than standard fast-acting fuses, these fuses provide the best protection for sensitive electronics.

Breakthrough current, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.

For technical drawings and 3-D models, click on a part number.

			Overall
Current, A	Voltage	Breakthrough Current	Lg.	Dia.	No. of Elements	Cartridge Fuse Style	Protection Type	Specifications Met		Each
Manufacturer Equivalent: A15QS, FWA, L15S
100	150V AC	100,000 A @ 150 V AC	2 11/16"	1 1/8"	1	Knife Blade	Fast Acting	UL Recognized Component	00000000	000000
Manufacturer Equivalent: A30QS, FWX, L25S
100	250V AC	200,000 A @ 250 V AC	3 1/8"	1 1/4"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	000000
Manufacturer Equivalent: A50QS, FWH, L50S
100	500V AC	200,000 A @ 500 V AC	3 5/8"	15/16"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	00000

Fast-Acting Lift Truck Fuses

These fuses open circuits quickly when surges are detected. Use them on battery-operated lift trucks.

Breakthrough current, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.

Fuses with blown fuse indicator have a dot on the side that changes color when the fuse blows.

For technical drawings and 3-D models, click on a part number.

Fuses
			Overall							Holders
Current, A	Voltage	Breakthrough Current	Lg.	Wd.	No. of Elements	Blown Fuse Indicator	Specifications Met		Each		Each
Manufacturer Equivalent: ANN, CNN
100	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	UL Recognized Component	000000000	000000	00000000	000000

High-Current Automotive Fuses

Suitable for battery and alternator circuit protection, these fuses can handle higher current than standard automotive fuses.

Breakthrough current, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.

For technical drawings and 3-D models, click on a part number.

Fuses										Holders
			Overall					Each			Each
Current, A	Voltage	Breakthrough Current	Lg.	Wd.	Protection Type	No. of Elements		1-9	10-Up		1-9	10-Up
Manufacturer Equivalent: MEGA
100	32V DC	2,000 A @ 32 V DC	2.7"	3/4"	Time Delay	1	0000000	00000	00000	000000	00000	00000

Touch-Safe Fuses

Prevent accidental contact with electrical circuits—these fuses have an enclosed design with recessed plug-in blades. Also known as dual-element fuses, they withstand current overload for a short time so they won't open when exposed to harmless temporary surges, such as when starting a motor.

Breakthrough current, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.

Fuses with blown fuse indicator have a dot on the side that turns red when the fuse blows.

For technical drawings and 3-D models, click on a part number.

Fuses													DIN-Rail Mount Fuse Blocks
Current, A	UL Class	Voltage	Breakthrough Current	Ht.	Wd.	Dp.	No. of Elements	Blown Fuse Indicator	Protection Type	Specifications Met		Each		Each
Manufacturer Equivalent: TCF
100	CF	600V AC/300V DC	100,000 A @ 300 V DC 300,000 A @ 600 V AC	3.01"	1"	1.26"	2	Yes	Time Delay	UL Listed, CSA Certified, EN 63000, IEC 63000	0000000	0000000	0000000	000000