2 1/2 Amp Fuses | McMaster-Carr

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200,000 amp @ 250V AC

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21 Products

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 @ 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.

												Pkg.
	Fuse Trade Size	Current, amp	Voltage, V AC	Breakthrough Current @ Voltage	Overall Lg.	No. of Elements	Fuse Protection Type	With Blown Fuse Indicator	Certification	Pkg. Qty.		1-9	10-Up
Manufacturer Equivalent Fuse: 225, C520, SMG







				0.18" Overall Diameter

				2AG	2 1/2	250	10,000 amp @ 125V AC	0.57"	1	Fast Acting	Yes	UL Listed, CSA Certified	5	3686T21	00000	00000


				Manufacturer Equivalent Fuse: 312, AGC, GGC







								1/4" Overall Diameter

								3AG	2 1/2	250	10,000 amp @ 125V AC	1 1/4"	1	Fast Acting	Yes	UL Listed	5	7085K35	0000	0000


								Manufacturer Equivalent Fuse: 217, GDB, GSB







												5 mm Overall Diameter

												—	2 1/2	250	35 amp @ 250V AC	20 mm	1	Fast Acting	Yes	UL Recognized Component, CSA Certified	5	6978K771	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 @ 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.

													Pkg.
	Fuse Trade Size	Current, amp	Voltage, V AC	Breakthrough Current @ Voltage	Overall Lg.	No. of Elements	Fuse Protection Type	With Blown Fuse Indicator	Certification	Specs. Met	Pkg. Qty.		1-9	10-Up
Manufacturer Equivalent Fuse: 229, C519, STG







				0.18" Overall Diameter

				2AG	2 1/2	250	10,000 amp @ 125V AC	0.57"	1	Time Delay	Yes	UL Listed, CSA Certified	—	5	3686T51	00000	00000


				Manufacturer Equivalent Fuse: 313, GDL, MDL







								1/4" Overall Diameter

								3AG	2 1/2	250	10,000 amp @ 125V AC	1 1/4"	1	Time Delay	Yes	UL Listed	—	5	7085K36	00000	00000


								Manufacturer Equivalent Fuse: 218, GDC, GDG







												5 mm Overall Diameter

												—	2 1/2	250	35 amp @ 250V AC	20 mm	1	Time Delay	Yes	UL Recognized Component, CSA Certified	IEC 60127-2	5	6978K751	00000	0000

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 @ 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: ATD-R, CCMR, LP-CC







				13/32" Overall Diameter

				2 1/2	CC	600V AC, 300V DC	200,000 amp @ 600V AC 100,000 amp @ 300V DC	1 1/2"	1	Ferrule	Time Delay	No	Yes	UL Listed	72035K505	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.

With Rejection-Style End—Fuses with a rejection-style end safeguard against replacement errors.

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: ATQ-R, FNQ-R, KLD-R







				13/32" Overall Diameter

				2 1/2	CC	600	200,000 amp @ 600V AC	1 1/2"	1	Ferrule	Time Delay	No	Yes	UL Listed	7714K37	000000	000000

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 @ 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	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: ATQ, FLQ, FNQ







				13/32" Overall Diameter

				2 1/2	500	10,000 amp @ 500V AC	1 1/2"	1	Ferrule	Time Delay	No	No	UL Listed, CSA Certified	7713K14	000000	00000


				Manufacturer Equivalent Fuse: FLM, FNM, TRM







								13/32" Overall Diameter

								2 1/2	250	10,000 amp @ 250V AC	1 1/2"	1	Ferrule	Time Delay	No	No	UL Listed, CSA Certified	7706K16	0000	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.

1/4" Overall Diameter—_1/4" dia. fuses can be used in high-current electronic circuits such as microwave ovens.

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.

													Pkg.
	Fuse Trade Size	Current, amp	Voltage, V AC	Breakthrough Current @ Voltage	Overall Lg.	No. of Elements	Fuse Protection Type	With Blown Fuse Indicator	Certification	UL File No.	Pkg. Qty.		1-9	10-Up
Manufacturer Equivalent Fuse: 326, GSA, MDA







				1/4" Overall Diameter

				3AB	2 1/2	250	10,000 amp @ 125V AC	1 1/4"	1	Time Delay	No	UL Listed, CSA Certified, CE Marked	E19180	—	71385K518	00000	00000


				Manufacturer Equivalent Fuse: 215, GSF, S505







								5 mm Overall Diameter

								—	2 1/2	250	100 amp @ 250V AC	20 mm	1	Time Delay	No	UL Recognized Component, CSA Certified, CE Marked	E10480	5	6986K637	00000	00000

UL Class RK5 Fuses


Ferrule Cartridge Fuse, With Blown Fuse Indicator	Ferrule 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







				9/16" Overall Diameter

				2 1/2	RK5	250V AC, 125V DC	200,000 amp @ 250V AC 20,000 amp @ 125V DC	2"	2	Ferrule	Time Delay	No	Yes	UL Listed, CSA Certified	E4273	053787_C_000	7049K185	000000	000000


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







								13/16" Overall Diameter

								2 1/2	RK5	600V AC, 300V DC	200,000 amp @ 600V AC 20,000 amp @ 300V DC	5"	2	Ferrule	Time Delay	No	Yes	UL Listed, CSA Certified	E4273	053787_C_000	7049K275	00000	00000


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







												13/16" Overall Diameter

												2 1/2	RK5	600V AC, 600V DC	200,000 amp @ 600V AC 20,000 amp @ 600V DC	5"	2	Ferrule	Time Delay	Yes	Yes	UL Listed, CSA Certified	—	—	7487K115	00000	00000

UL Class J Time-Delay Fuses for Tight Spaces

Ferrule

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.

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







				13/16" Overall Diameter

				2 1/2	J	600V AC, 300V DC	300,000 amp @ 600V AC 100,000 amp @ 300V DC	2 1/4"	2	Ferrule	Time Delay	No	No	UL Listed, CSA Certified	70325K323	000000	000000

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.

1/4" Overall Diameter—_1/4" dia. fuses can be used in high-current electronic circuits such as microwave ovens.

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.

												Pkg.
	Fuse Trade Size	Voltage	Breakthrough Current @ Voltage	Overall Lg.	No. of Elements	Fuse Protection Type	With Blown Fuse Indicator	Certification	Current, amp	Pkg. Qty.		1-9	10-Up
Manufacturer Equivalent Fuse: 314, ABC, GAB







				1/4" Overall Diameter

				3AB	250V AC, 125V DC	10,000 amp @ 125V AC 10,000 amp @ 125V DC	1 1/4"	1	Fast Acting	No	UL Listed, CSA Certified	2 1/2	5	71385K27	000000	00000


				Manufacturer Equivalent Fuse: 216, GDA, GSD







								5 mm Overall Diameter

								—	250V AC	1,500 amp @ 250V AC	20 mm	1	Fast Acting	No	UL Recognized Component	2 1/2	5	6986K618	00000	00000

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 @ 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: ATM-R, KLK-R, KTK-R







				13/32" Overall Diameter

				2 1/2	CC	600	200,000 amp @ 600V AC	1 1/2"	1	Ferrule	Fast Acting	No	Yes	UL Listed	74495K155	000000	000000

UL Class RK1 Time-Delay Fuses

Ferrule

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







				9/16" Overall Diameter

				2 1/2	RK1	250V AC, 125V DC	300,000 amp @ 250V AC 100,000 amp @ 125V DC	2"	2	Ferrule	Time Delay	No	Yes	UL Listed, CSA Certified	74445K615	000000	000000


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







								13/16" Overall Diameter

								2 1/2	RK1	600V AC, 300V DC	300,000 amp @ 600V AC 100,000 amp @ 300V DC	5"	2	Ferrule	Time Delay	No	Yes	UL Listed, CSA Certified	74445K715	00000	00000