125 Amp Fuses | McMaster-Carr

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Manufacturer Equivalent Fuse

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Cartridge Fuse Type

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2,500 amp @ 125V AC

200,000 amp @ 250V AC

300,000 amp @ 250V AC

200,000 amp @ 500V AC

200,000 amp @ 600V AC

300,000 amp @ 600V AC

100,000 amp @ 250V DC

20,000 amp @ 300V DC

100,000 amp @ 300V DC

100,000 amp @ 400V DC

With Blown Fuse Indicator

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14 Products

UL Class RK5 Fuses


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

				125	RK5	250V AC, 125V DC	200,000 amp @ 250V AC 20,000 amp @ 125V DC	7 1/8"	2	Knife Blade	Time Delay	No	Yes	UL Listed, CSA Certified	E4273	053787_C_000	00000000	0000000	0000000


				Manufacturer Equivalent Fuse: FLN-R-ID, FRN-R-ID, TR-R-ID







								1 9/16" Overall Diameter

								125	RK5	250V AC, 250V DC	200,000 amp @ 250V AC 20,000 amp @ 250V DC	7 1/8"	2	Knife Blade	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	00000000	000000	00000


								Manufacturer Equivalent Fuse: FLS-R, FRS-R, TRS-R







												1 5/8" Overall Diameter

												125	RK5	600V AC, 300V DC	200,000 amp @ 600V AC 20,000 amp @ 300V DC	9 5/8"	2	Knife Blade	Time Delay	No	Yes	UL Listed, CSA Certified	E4273	053787_C_000	00000000	000000	000000


												Manufacturer Equivalent Fuse: FRS-R-ID, IDSR, TRS-R-ID







																1 9/16" Overall Diameter

																125	RK5	600V AC, 300V DC	200,000 amp @ 600V AC 20,000 amp @ 300V DC	9 5/8"	2	Knife Blade	Time Delay	No	Yes	UL Listed, CSA Certified	E4273	053787_C_000	00000000	000000	000000

UL Class J Time-Delay Fuses for Tight Spaces


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

				125	J	600V AC, 300V DC	300,000 amp @ 600V AC 100,000 amp @ 300V DC	5 3/4"	2	Knife Blade	Time Delay	No	No	UL Listed, CSA Certified	000000000	0000000	0000000


				Manufacturer Equivalent Fuse: AJT, JTD-ID, LPJ-SPI







								1 5/8" Overall Diameter

								125	J	600V AC, 400V DC	200,000 amp @ 600V AC 100,000 amp @ 400V DC	5 3/4"	4	Knife Blade	Time Delay	Yes	No	UL Listed, CSA Certified	0000000	000000	000000

UL Class RK1 Time-Delay Fuses

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

				125	RK1	250V AC, 250V DC	300,000 amp @ 250V AC 100,000 amp @ 250V DC	7 1/8"	2	Knife Blade	Time Delay	No	Yes	UL Listed, CSA Certified	000000000	000000	000000


				Manufacturer Equivalent Fuse: A6D-R, LLS-RK, LPS-RK







								1 11/16" Overall Diameter

								125	RK1	600V AC, 300V DC	300,000 amp @ 600V AC 100,000 amp @ 300V DC	9 5/8"	2	Knife Blade	Time Delay	No	Yes	UL Listed, CSA Certified	000000000	000000	000000

UL Class T Fuses for Extra-Tight Spaces

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, V AC	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: A6T, JJS, JLLS







				7/8" Overall Diameter

				125	T	600	200,000 amp @ 600V AC	3 1/4"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	00000000	0000000	000000

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



		125	32	2,000 amp @ 32V DC	2.7"	3/4"	1	Time Delay	No	0000000	00000	00000	000000	00000

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: ANN, CNN



		125	125V AC, 80V DC	2,500 amp @ 125V AC 2,700 amp @ 80V DC	3 3/16"	7/8"	1	Fast Acting	Yes	UL Recognized Component	000000000	000000	00000000	000000

Fuses for Sensitive Electronics

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.

	Overall Lg.	No. of Elements	Cartridge Fuse Type	Fuse Protection Type	With Blown Fuse Indicator	Rejection-Style End	Certification		Each
Manufacturer Equivalent Fuse: A50QS, FWH, L50S







	1 3/16" Overall Diameter

	125	500	200,000 amp @ 500V AC	3 5/8"	1	Knife Blade	Fast Acting	No	No	UL Recognized Component	000000000	000000