Class T Fuses | McMaster-Carr

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200,000 amp @ 300V AC

200,000 amp @ 600V AC

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49 Products

UL Class T Fuses for Extra-Tight Spaces


Ferrule 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







				7/16" Overall Diameter

				3	T	300V AC	200,000 amp @ 300V AC	7/8"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	000000	000000


				10	T	300V AC	200,000 amp @ 300V AC	7/8"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
				15	T	300V AC, 160V DC	200,000 amp @ 300V AC 20,000 amp @ 160V DC	7/8"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
				20	T	300V AC, 160V DC	200,000 amp @ 300V AC 20,000 amp @ 160V DC	7/8"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
				30	T	300V AC, 160V DC	200,000 amp @ 300V AC 20,000 amp @ 160V DC	7/8"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000




						9/16" Overall Diameter

						35	T	300V AC, 160V DC	200,000 amp @ 300V AC 20,000 amp @ 160V DC	7/8"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000


						40	T	300V AC, 160V DC	200,000 amp @ 300V AC 20,000 amp @ 160V DC	7/8"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
						50	T	300V AC, 160V DC	200,000 amp @ 300V AC 20,000 amp @ 160V DC	7/8"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
						60	T	300V AC, 160V DC	200,000 amp @ 300V AC 20,000 amp @ 160V DC	7/8"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000




								3/4" Overall Diameter

								80	T	300V AC, 160V DC	200,000 amp @ 300V AC 20,000 amp @ 160V DC	2 3/16"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	00000000	00000	00000


								100	T	300V AC, 160V DC	200,000 amp @ 300V AC 20,000 amp @ 160V DC	2 3/16"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	00000000	00000	00000




										7/8" Overall Diameter

										150	T	300V AC, 160V DC	200,000 amp @ 300V AC 20,000 amp @ 160V DC	2 7/16"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	00000000	00000	00000


										200	T	300V AC, 160V DC	200,000 amp @ 300V AC 20,000 amp @ 160V DC	2 7/16"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	00000000	00000	00000




												1" Overall Diameter

												300	T	300V AC, 160V DC	200,000 amp @ 300V AC 20,000 amp @ 160V DC	2 3/4"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	00000000	000000	000000


												400	T	300V AC, 160V DC	200,000 amp @ 300V AC 20,000 amp @ 160V DC	2 3/4"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	00000000	000000	00000


												Manufacturer Equivalent Fuse: A6T, JJS, JLLS







														9/16" Overall Diameter

		3	T											600V AC	200,000 amp @ 600V AC	1 1/2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000


		10	T											600V AC	200,000 amp @ 600V AC	1 1/2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
		15	T											600V AC	200,000 amp @ 600V AC	1 1/2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
		20	T											600V AC	200,000 amp @ 600V AC	1 1/2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
		25	T											600V AC	200,000 amp @ 600V AC	1 1/2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
		30	T											600V AC	200,000 amp @ 600V AC	1 1/2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000




				3/4" Overall Diameter

				70	T									600V AC	200,000 amp @ 600V AC	2 15/16"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000


				80	T									600V AC	200,000 amp @ 600V AC	2 15/16"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
				90	T									600V AC	200,000 amp @ 600V AC	2 15/16"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
				100	T									600V AC	200,000 amp @ 600V AC	2 15/16"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	00000000	00000	00000




														13/16" Overall Diameter

						35	T							600V AC	200,000 amp @ 600V AC	1 9/16"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000


						40	T							600V AC	200,000 amp @ 600V AC	1 9/16"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
						45	T							600V AC	200,000 amp @ 600V AC	1 9/16"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
						50	T							600V AC	200,000 amp @ 600V AC	1 9/16"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
						60	T							600V AC	200,000 amp @ 600V AC	1 9/16"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	000000000	00000	00000




								7/8" Overall Diameter

								125	T					600V AC	200,000 amp @ 600V AC	3 1/4"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	00000000	000000	00000


								200	T					600V AC	200,000 amp @ 600V AC	3 1/4"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	00000000	000000	00000




										1" Overall Diameter

										400	T			600V AC	200,000 amp @ 600V AC	3 5/8"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified, CE Marked	00000000	000000	000000

Fuse Blocks for UL Class Fuses


For 1 Fuse, Box-Lug Terminal Wire Connection	For 2 Fuses, Box-Lug-Terminal Wire Connection	For 3 Fuses, Box-Lug-Terminal Wire Connection

		For Fuse
	For No. of Fuses	UL Class	Current, amp	Type	Voltage, V AC	Wire Connection	Certification		Each
For Fuse Manufacturer Equivalent: A3T, JJN, JLLN



		2	T	1/2 to 30	Cartridge	300	Box-Lug Terminal	UL Listed, CSA Certified, CE Marked	00000000	000000


		2	T	31 to 60	Cartridge	300	Box-Lug Terminal	UL Listed, CSA Certified, CE Marked	00000000	00000
		3	T	1/2 to 30	Cartridge	300	Box-Lug Terminal	UL Listed, CSA Certified, CE Marked	00000000	00000
		3	T	31 to 60	Cartridge	300	Box-Lug Terminal	UL Listed, CSA Certified, CE Marked	00000000	00000
		3	T	61 to 100	Cartridge	300	Box-Lug Terminal	UL Listed, CSA Certified, CE Marked	00000000	000000


		For Fuse Manufacturer Equivalent: A6T, JJS, JLLS



				1	T	1/2 to 30	Cartridge	600	Box-Lug Terminal	UL Listed, CSA Certified, CE Marked	0000000	00000


				1	T	31 to 60	Cartridge	600	Box-Lug Terminal	UL Listed, CSA Certified, CE Marked	0000000	00000
				1	T	61 to 100	Cartridge	600	Box-Lug Terminal	UL Listed, CSA Certified, CE Marked	00000000	00000
				2	T	1/2 to 30	Cartridge	600	Box-Lug Terminal	UL Listed, CSA Certified, CE Marked	0000000	00000
				2	T	31 to 60	Cartridge	600	Box-Lug Terminal	UL Listed, CSA Certified, CE Marked	0000000	00000
				2	T	61 to 100	Cartridge	600	Box-Lug Terminal	UL Listed, CSA Certified, CE Marked	00000000	000000
				3	T	1/2 to 30	Cartridge	600	Box-Lug Terminal	UL Listed, CSA Certified, CE Marked	0000000	00000
				3	T	31 to 60	Cartridge	600	Box-Lug Terminal	UL Listed, CSA Certified, CE Marked	0000000	00000
				3	T	61 to 100	Cartridge	600	Box-Lug Terminal	UL Listed, CSA Certified, CE Marked	00000000	000000

Fuse Block Safety Covers

Prevent accidental shocks with these snap-on safety covers. They have slotted openings for testing with probes.

For Fuse
UL Class	Current	Protection Type	Voltage	Lg.	Wd.	Ht.	With Blown Fuse Indicator	Certification		Each
H, RK1, RK5 T	0.1 amp to 30 amp 1 amp to 30 amp	Fast Acting, Time Delay	250V AC 600V AC	3.8"	0.75"	1.7"	No	UL Listed, CSA Certified, CE Marked	0000000	000000
H, RK1, RK5 T	0.1 amp to 30 amp 1 amp to 30 amp	Fast Acting, Time Delay	250V AC 600V AC	3.8"	0.75"	1.7"	Yes	UL Listed, CSA Certified, CE Marked	0000000	00000