1/2 Amp Fuses | McMaster-Carr

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25 Products

About Fuses

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UL Class CC Time-Delay Midget Fuses for Motors

These fuses can withstand the high inrush current caused by a motor starting. They provide comparable performance with a smaller footprint than standard size fuses. All have a rejection-style end that safeguards against replacement errors. Use them to protect power distribution branch circuits. Designed for use with Fuse Blocks for UL Class CC 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: ATD-R, CCMR, LP-CC
1/2	600V AC/300V DC	100,000 A @ 300 V DC 200,000 A @ 600 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed	000000000	000000	000000

UL Class CC Time-Delay Midget Fuses for Transformers

Designed to handle high inrush currents and the initial current cycle unique to transformers, these fuses provide comparable performance with a smaller footprint than standard size fuses. Use them to protect power distribution branch circuits. They’re for use with Fuse Blocks for UL Class CC Fuses.

Fuses with a rejection-style end safeguard against replacement errors.

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	Rejection-Style End	Specifications Met		1-9	10-Up
Manufacturer Equivalent: ATQ-R, FNQ-R, KLD-R
1/2	600V AC	200,000 A @ 600 V AC	1 1/2"	13/32"	1	Ferrule	Yes	UL Listed	0000000	000000	000000

UL Class CC Fast-Acting Midget Fuses

These fuses open circuits quickly when surges are detected. They provide comparable performance with a smaller footprint than standard size fuses. Use them in power distribution branch circuits. All have a rejection-style end that safeguards against replacement errors. Designed for use with Fuse Blocks for UL Class CC 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: ATM-R, KLK-R, KTK-R
1/2	600V AC	200,000 A @ 600 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed	00000000	000000	000000

UL Class RK5 Fuses

Ferrule Style

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.

			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
1/2	250V AC/125V DC	20,000 A @ 125 V DC 200,000 A @ 250 V AC	2"	9/16"	2	Ferrule	No	UL Listed, CSA Certified	E4273	053787_C_000	00000000	000000	000000
Manufacturer Equivalent: FLS-R, FRS-R, TRS-R
1/2	600V AC/300V DC	20,000 A @ 300 V DC 200,000 A @ 600 V AC	5"	13/16"	2	Ferrule	No	UL Listed, CSA Certified	E4273	053787_C_000	00000000	00000	00000

UL Class RK1 Time-Delay Fuses

Ferrule 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
1/2	250V AC/125V DC	100,000 A @ 125 V DC 300,000 A @ 250 V AC	2"	9/16"	2	Ferrule	UL Listed, CSA Certified	000000000	000000	000000
Manufacturer Equivalent: A6D-R, LLS-RK, LPS-RK
1/2	600V AC/300V DC	100,000 A @ 300 V DC 300,000 A @ 600 V AC	5"	13/16"	2	Ferrule	UL Listed, CSA Certified	000000000	00000	00000

Fast-Acting Glass-Tube Fuses

0.18" Dia.

1/4" Dia.

5mm Dia.

These fuses open circuits quickly when surges are detected. The clear glass tube makes it easy to see when fuses open. Use them with electronics, control panels, and other sensitive components. Select them by their diameter. Designed for use with Fuse Blocks for Glass-Tube 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.

										Pkg.
Fuse Trade Size	Current, A	Voltage	Breakthrough Current	Overall Lg.	No. of Elements	Blown Fuse Indicator	Specifications Met	Pkg. Qty.		1-9	10-Up
Manufacturer Equivalent: 225, C520, SMG
0.18" Overall Dia.
2AG	1/2	250V AC	10,000 A @ 125 V AC	0.57"	1	Yes	UL Listed, CSA Certified	5	0000000	00000	00000
Manufacturer Equivalent: 312, AGC, GGC
1/4" Overall Dia.
3AG	1/2	250V AC	10,000 A @ 125 V AC	1 1/4"	1	Yes	UL Listed	5	0000000	0000	0000
Manufacturer Equivalent: 217, GDB, GSB
5mm Overall Dia.
__	1/2	250V AC	35 A @ 250 V AC	20mm	1	Yes	UL Recognized Component, CSA Certified	5	00000000	0000	0000
Manufacturer Equivalent: 235, GGM, GMA
5mm Overall Dia.
__	1/2	250V AC	35 A @ 250 V AC	20mm	1	Yes	UL Listed, CSA Certified	5	00000000	0000	0000

Time-Delay Glass-Tube Fuses

0.18" Dia.

1/4" Dia.

5mm Dia.

Able to withstand current overload for a short time, these fuses will not open when exposed to harmless temporary surges. The clear glass tube makes it easy to see when fuses open. Use them with electronics, control panels, and other sensitive components. Select these fuses by their diameters. Designed for use with Fuse Blocks for Glass-Tube 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.

										Pkg.
Fuse Trade Size	Current, A	Voltage	Breakthrough Current	Overall Lg.	No. of Elements	Blown Fuse Indicator	Specifications Met	Pkg. Qty.		1-9	10-Up
Manufacturer Equivalent: 229, C519, STG
0.18" Overall Dia.
2AG	1/2	250V AC	10,000 A @ 125 V AC	0.57"	1	Yes	UL Listed, CSA Certified	5	0000000	000000	00000
Manufacturer Equivalent: 313, GDL, MDL
1/4" Overall Dia.
3AG	1/2	250V AC	10,000 A @ 125 V AC	1 1/4"	1	Yes	UL Listed	5	0000000	00000	00000
Manufacturer Equivalent: 218, GDC, GDG
5mm Overall Dia.
__	1/2	250V AC	35 A @ 250 V AC	20mm	1	Yes	UL Recognized Component, CSA Certified, IEC 60127-2	5	00000000	00000	0000

Time-Delay Ceramic-Tube Fuses

1/4" Dia.

5mm Dia.

Able to withstand current overload for a short time, these fuses will not open when exposed to harmless temporary surges. They can withstand temperature swings and high ambient temperatures better than glass-tube fuses. Use them with electronics, control panels, and other sensitive components. Select these fuses by their diameters. Designed for use with Fuse Blocks for Ceramic-Tube 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.

1/4" dia. fuses can be used in high-current electronic circuits such as microwave ovens.

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

								Each
Fuse Trade Size	Current, A	Voltage	Breakthrough Current	Overall Lg.	No. of Elements	Specifications Met		1-9	10-Up
Manufacturer Equivalent: 326, GSA, MDA
1/4" Overall Dia.
3AB	1/2	250V AC	10,000 A @ 125 V AC	1 1/4"	1	UL Listed, CSA Certified, CE Marked	000000000	00000	00000

								Pkg.
Current, A	Voltage	Breakthrough Current	Overall Lg., mm	No. of Elements	Specifications Met	Pkg. Qty.		1-9	10-Up
Manufacturer Equivalent: 215, GSF, S505
5mm Overall Dia.
1/2	250V AC	100 A @ 250 V AC	20	1	UL Recognized Component, CSA Certified, CE Marked	5	00000000	000000	000000
Manufacturer Equivalent: 477
5mm Overall Dia.
1/2	500V AC/400V DC	100 A @ 500 V AC 400 A @ 400 V DC	20	1	UL Recognized Component, C-UL Recognized Component, CE Marked	5	00000000	00000	00000

Fast-Acting Ceramic-Tube Fuses

1/4" Dia.

5mm Dia.

These fuses open circuits quickly when surges are detected. They can withstand temperature swings and high ambient temperatures better than glass-tube fuses. Use with electronics, control panels, and other sensitive components. Select these fuses by their diameters. Designed for use with Fuse Blocks for Ceramic-Tube 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.

1/4" dia. fuses can be used in high-current electronic circuits such as microwave ovens.

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

									Pkg.
Fuse Trade Size	Current, A	Voltage	Breakthrough Current	Overall Lg.	No. of Elements	Specifications Met	Pkg. Qty.		1-9	10-Up
Manufacturer Equivalent: 314, ABC, GAB
1/4" Overall Dia.
3AB	1/2	250V AC/125V DC	10,000 A @ 125 V AC 10,000 A @ 125 V DC	1 1/4"	1	UL Listed, CSA Certified	5	00000000	00000	00000
Manufacturer Equivalent: 216, GDA, GSD
5mm Overall Dia.
__	1/2	250V AC	1,500 A @ 250 V AC	20mm	1	UL Recognized Component	5	00000000	00000	00000

Time-Delay Midget Fuses

Able to withstand current overload for a short time, these fuses will not open when exposed to harmless temporary surges, such as when starting a motor. Use them to protect equipment—they are not designed for power distribution circuits. Designed for use with Fuse Blocks for Midget 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: ATQ, FLQ, FNQ
1/2	500V AC	10,000 A @ 500 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	000000	000000
Manufacturer Equivalent: FLM, FNM, TRM
1/2	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000

Fast-Acting Midget Fuses

These fuses open circuits quickly when surges are detected. Use them to protect equipment—they are not designed for power distribution circuits. Designed for use with Fuse Blocks for Midget 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: ATM, KLK, KTK
1/2	600V AC	100,000 A @ 600 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	000000000	000000	000000

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

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