300V AC Fuses | McMaster-Carr

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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	000000	00000

Fast-Acting Inline Fuses

Also known as LGR fuses, these fuses protect fluorescent light fixtures. They open circuits quickly when surges are detected. You'll need both a fuse and a fuse holder (not included) to add an inline fuse to an existing circuit. Fuses have a built-in cap that securely connects to the fuse holder.

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.	Number of Elements	Specifications Met		Each
Manufacturer Equivalent: GLR, LGR, SLR
1	300V AC	10,000 A @ 300 V AC	1.82"	0.61"	1	UL Listed, CSA Certified	000000000	00000
1 1/2	300V AC	10,000 A @ 300 V AC	1.82"	0.61"	1	UL Listed, CSA Certified	000000000	0000
2	300V AC	10,000 A @ 300 V AC	1.82"	0.61"	1	UL Listed, CSA Certified	000000000	0000
3	300V AC	10,000 A @ 300 V AC	1.82"	0.61"	1	UL Listed, CSA Certified	000000000	0000
4	300V AC	10,000 A @ 300 V AC	1.82"	0.61"	1	UL Listed, CSA Certified	000000000	0000
5	300V AC	10,000 A @ 300 V AC	1.82"	0.61"	1	UL Listed, CSA Certified	000000000	0000
10	300V AC	10,000 A @ 300 V AC	1.82"	0.61"	1	UL Listed, CSA Certified	000000000	0000

Inline Fuse Holders	00000000	Each	00000
Optional Panel-Mount Clips	00000000	Each	0000

Time-Delay Inline Fuses

Able to withstand current overload for a short time, these fuses will not open when exposed to harmless temporary surges. They are designed to handle high inrush loads from ballast transformers in fluorescent lighting systems. You'll need both a fuse and a fuse holder (not included) to add an inline fuse to an existing circuit. Fuses have a built-in cap that securely connects to the fuse holder. Also known as LMF 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
Current, A	Voltage	Breakthrough Current	Lg.	Dia.	No. of Elements	Specifications Met		Each
Manufacturer Equivalent: LMF, SMF
1/2	300V AC	10,000 A @ 300 V AC	1.82"	0.61"	1	UL Listed, CSA Certified	000000000	00000
1	300V AC	10,000 A @ 300 V AC	1.82"	0.61"	1	UL Listed, CSA Certified	000000000	0000
1 6/10	300V AC	10,000 A @ 300 V AC	1.82"	0.61"	1	UL Listed, CSA Certified	000000000	0000
2	300V AC	10,000 A @ 300 V AC	1.82"	0.61"	1	UL Listed, CSA Certified	000000000	0000
3 2/10	300V AC	10,000 A @ 300 V AC	1.82"	0.61"	1	UL Listed, CSA Certified	000000000	0000

Optional Panel-Mount Clips	00000000	Each	00000
Inline Fuse Holders	00000000	Each	0000

Inline Fuse Holders

Knock-Out Hole

Add an inline fuse to an existing circuit. This holder is for use with both time-delay and fast-acting inline fuses.

Panel-mount clips (sold separately) are required to mount holder into a panel knock-out.

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

					For Panel Cutout
For No. of Fuses	For Fuse Current, A	Voltage	No. of Wire Leads	Wire Lead Lg.	Ht.	Wd.	Lg.	Specifications Met		Each
For Fuse Manufacturer Equivalent: LGR, LMF
1	1/2-10	300V AC	2	7"	0.75"	0.88"	2.25"	UL Recognized Component	00000000	00000

Optional Panel-Mount Clips

00000000

Each

00000

Fuse Blocks for UL Class Fuses

For 2 Fuses with Box-Lug Terminals

For 3 Fuses with Box-Lug Terminals

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

	For Fuse
For No. of Fuses	UL Class	Current, A	Voltage	Wire Connection Type	Specifications Met		Each
For Fuse Manufacturer Equivalent: A3T, JJN, JLLN
2	T	1/2-30	300V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	00000000	000000
2	T	31-60	300V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	00000000	00000
3	T	1/2-30	300V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	00000000	00000
3	T	31-60	300V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	00000000	00000
3	T	61-100	300V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	00000000	000000

Fuse Blocks for Glass-Tube and Ceramic-Tube Fuses

For 1 Fuse with 45° Elbow
Quick-Disconnect
Terminal

For 2 Fuses with 45° Elbow
Quick-Disconnect
Terminals

For 10 Fuses with 40° Elbow Quick-Disconnect Terminals

For 10 Fuses with Straight
Quick-Disconnect
Terminals

For 10 Fuses with Screw Terminals

These fuse blocks fit ¼" glass- and ceramic-tube fuses. All have spring clips that hold fuses securely, yet allow for quick changes.

	For Fuse						Quick-Disconnect Tab
For No. of Fuses	Trade Size	Current, A	Overall Dia.	Overall Lg.	Voltage	Wire Connection Type	Wd.	Shape	Specifications Met		Each
For Fuse Manufacturer Equivalent: 312, 313, 314, 322, 326, 505, ABC, AGC, GAB, GBB, GDL, GGC, GSA, MDA, MDL
1	3AB, 3AG	1/10-20	1/4"	1 1/4"	300V AC	Quick-Disconnect Terminals	0.187"	45° Elbow	UL Recognized Component	0000000	00000
1	3AB, 3AG	1/10-30	1/4"	1 1/4"	300V AC	Quick-Disconnect Terminals	0.25"	45° Elbow	UL Recognized Component	0000000	0000
2	3AB, 3AG	1/10-20	1/4"	1 1/4"	300V AC	Quick-Disconnect Terminals	0.187"	45° Elbow	UL Recognized Component	0000000	0000
2	3AB, 3AG	1/10-30	1/4"	1 1/4"	300V AC	Quick-Disconnect Terminals	0.25"	45° Elbow	UL Recognized Component	0000000	0000
10	3AB, 3AG	1/10-20	1/4"	1 1/4"	300V AC	Quick-Disconnect Terminals	0.187"	40° Elbow	UL Recognized Component	000000	00000
10	3AB, 3AG	1/10-20	1/4"	1 1/4"	300V AC	Quick-Disconnect Terminals	0.187"	Straight	UL Recognized Component	000000	00000
10	3AB, 3AG	1/10-20	1/4"	1 1/4"	300V AC	Quick-Disconnect Terminals	0.25"	40° Elbow	UL Recognized Component	000000	00000
10	3AB, 3AG	1/10-20	1/4"	1 1/4"	300V AC	Quick-Disconnect Terminals	0.25"	Straight	UL Recognized Component	000000	00000
10	3AB, 3AG	1/10-30	1/4"	1 1/4"	300V AC	Screw Terminals	__	__	UL Recognized Component	000000	00000

Panel-Mount Fuse Holders for Glass-Tube and Ceramic-Tube Fuses

For 2AG Fuses
with 90° Elbow
Quick-Disconnect Terminal

Insert glass- and ceramic-tube fuses into holders and twist the cover closed.

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

	For Fuse					Quick-Disconnect Tab		For Panel Cutout
For No. of Fuses	Trade Size	Current, A	Overall Dia.	Overall Lg.	Voltage	Wd.	Shape	Ht.	Wd.	For Panel Thick.	Lg.	Material	Specifications Met		Each
For Fuse Manufacturer Equivalent: 225, 229, C519, C520, SMG, STG
1	2AG	3/8-10	0.18"	0.57"	300V AC	0.11"	90° Elbow	0.44"	0.39"	0.25"	0.93"	Plastic	UL Recognized Component	0000000	000000

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About Fuses

UL Class T Fuses for Extra-Tight Spaces

Fast-Acting Inline Fuses

Time-Delay Inline Fuses

Inline Fuse Holders

Fuse Blocks for UL Class Fuses

Fuse Blocks for Glass-Tube and Ceramic-Tube Fuses

Panel-Mount Fuse Holders for Glass-Tube and Ceramic-Tube Fuses