Class T Fuses | McMaster-Carr

	Current Current

	Manufacturer Equivalent Manufacturer Equivalent

	Voltage Voltage

300V AC

600V AC

160V DC

	UL Class UL Class

	Fuse Type Fuse Type

	Cartridge

	Overall Length Overall Length

	Overall Diameter Overall Diameter

	Cartridge Fuse Style Cartridge Fuse Style

Ferrule

Knife Blade

	Protection Type Protection Type

Fast Acting

	Specifications Met Specifications Met

CSA

CE Marked

	Breakthrough Current Breakthrough Current

20,000 A @ 160 V DC

200,000 A @ 300 V AC

200,000 A @ 600 V AC

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	Rejection-Style End Rejection-Style End

	Blown Fuse Indicator Blown Fuse Indicator

	Number of Elements Number of Elements

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

Forward

How can we improve?

33 Products

Don’t see the fuse you need? Just tell us what you’re looking for and we’ll get it for you.

About Fuses

Ferrule Style

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
3	300V AC	200,000 A @ 300 V AC	7/8"	7/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	000000	000000
10	300V AC	200,000 A @ 300 V AC	7/8"	7/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
15	300V AC/160V DC	20,000 A @ 160 V DC 200,000 A @ 300 V AC	7/8"	7/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
20	300V AC/160V DC	20,000 A @ 160 V DC 200,000 A @ 300 V AC	7/8"	7/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
30	300V AC/160V DC	20,000 A @ 160 V DC 200,000 A @ 300 V AC	7/8"	7/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
35	300V AC/160V DC	20,000 A @ 160 V DC 200,000 A @ 300 V AC	7/8"	9/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
40	300V AC/160V DC	20,000 A @ 160 V DC 200,000 A @ 300 V AC	7/8"	9/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
50	300V AC/160V DC	20,000 A @ 160 V DC 200,000 A @ 300 V AC	7/8"	9/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
60	300V AC/160V DC	20,000 A @ 160 V DC 200,000 A @ 300 V AC	7/8"	9/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
80	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	00000	00000
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	00000	00000
150	300V AC/160V DC	20,000 A @ 160 V DC 200,000 A @ 300 V AC	2 7/16"	7/8"	1	Knife Blade	UL Listed, CSA Certified, CE Marked	00000000	00000	00000
200	300V AC/160V DC	20,000 A @ 160 V DC 200,000 A @ 300 V AC	2 7/16"	7/8"	1	Knife Blade	UL Listed, CSA Certified, CE Marked	00000000	00000	00000
300	300V AC/160V DC	20,000 A @ 160 V DC 200,000 A @ 300 V AC	2 3/4"	1"	1	Knife Blade	UL Listed, CSA Certified, CE Marked	00000000	000000	000000
400	300V AC/160V DC	20,000 A @ 160 V DC 200,000 A @ 300 V AC	2 3/4"	1"	1	Knife Blade	UL Listed, CSA Certified, CE Marked	00000000	00000	00000
Manufacturer Equivalent: A6T, JJS, JLLS
3	600V AC	200,000 A @ 600 V AC	1 1/2"	9/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
10	600V AC	200,000 A @ 600 V AC	1 1/2"	9/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
15	600V AC	200,000 A @ 600 V AC	1 1/2"	9/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
20	600V AC	200,000 A @ 600 V AC	1 1/2"	9/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
25	600V AC	200,000 A @ 600 V AC	1 1/2"	9/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
30	600V AC	200,000 A @ 600 V AC	1 1/2"	9/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
35	600V AC	200,000 A @ 600 V AC	1 9/16"	13/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
40	600V AC	200,000 A @ 600 V AC	1 9/16"	13/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
45	600V AC	200,000 A @ 600 V AC	1 9/16"	13/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
50	600V AC	200,000 A @ 600 V AC	1 9/16"	13/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
60	600V AC	200,000 A @ 600 V AC	1 9/16"	13/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
70	600V AC	200,000 A @ 600 V AC	2 15/16"	3/4"	1	Knife Blade	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
80	600V AC	200,000 A @ 600 V AC	2 15/16"	3/4"	1	Knife Blade	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
90	600V AC	200,000 A @ 600 V AC	2 15/16"	3/4"	1	Knife Blade	UL Listed, CSA Certified, CE Marked	000000000	00000	00000
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
125	600V AC	200,000 A @ 600 V AC	3 1/4"	7/8"	1	Knife Blade	UL Listed, CSA Certified, CE Marked	00000000	00000	00000
200	600V AC	200,000 A @ 600 V AC	3 1/4"	7/8"	1	Knife Blade	UL Listed, CSA Certified, CE Marked	00000000	00000	00000
400	600V AC	200,000 A @ 600 V AC	3 5/8"	1"	1	Knife Blade	UL Listed, CSA Certified, CE Marked	00000000	000000	000000

Email Us

About Fuses

UL Class T Fuses for Extra-Tight Spaces