E2137 Fuses | McMaster-Carr

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76 Products

UL Class K5 Fuses


Ferrule Cartridge Fuse	Knife-Blade Cartridge Fuse

Use these fast-acting fuses in applications where temporary overload current is not present, such as in lighting and heating. They open circuits quickly when surges are detected. Use with Fuse Blocks for UL Class K5 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	UL File No.	CSA File No.		1-9	10-Up
Manufacturer Equivalent Fuse: NLN, NON, OT







				9/16" Overall Diameter

				2	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K141	00000	00000


				3	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K101	0000	0000
				4	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K142	0000	0000
				5	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K102	0000	0000
				6	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K127	0000	0000
				7	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K143	0000	0000
				8	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K144	0000	0000
				10	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K103	0000	0000
				12	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K145	0000	0000
				15	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K104	0000	0000
				20	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K105	0000	0000


				25	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K146	0000	0000
				30	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K106	0000	0000




						13/16" Overall Diameter

						35	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	3"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K128	0000	0000


						40	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	3"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K107	0000	0000
						45	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	3"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K147	0000	0000
						50	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	3"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K108	0000	0000
						60	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	3"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K109	0000	0000




								1 1/16" Overall Diameter

								70	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	5 7/8"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K131	00000	00000


								80	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	5 7/8"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K132	00000	00000
								100	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	5 7/8"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K111	00000	00000




										1 9/16" Overall Diameter

										200	K5	250V AC, 250V DC	50,000 amp @ 250V AC 20,000 amp @ 250V DC	7 1/8"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K112	00000	00000


										Manufacturer Equivalent Fuse: NLS, NOS, OTS







												13/16" Overall Diameter

		3										K5	600V AC, 300V DC	50,000 amp @ 600V AC 20,000 amp @ 300V DC	5"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K114	00000	00000


		5	K5									600V AC, 300V DC	50,000 amp @ 600V AC 20,000 amp @ 300V DC	5"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K115	00000	00000
		10	K5									600V AC, 300V DC	50,000 amp @ 600V AC 20,000 amp @ 300V DC	5"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K116	00000	00000
		15	K5									600V AC, 300V DC	50,000 amp @ 600V AC 20,000 amp @ 300V DC	5"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K117	00000	00000
		20	K5									600V AC, 300V DC	50,000 amp @ 600V AC 20,000 amp @ 300V DC	5"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K118	00000	00000
		25	K5									600V AC, 300V DC	50,000 amp @ 600V AC 20,000 amp @ 300V DC	5"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K148	00000	00000
		30	K5									600V AC, 300V DC	50,000 amp @ 600V AC 20,000 amp @ 300V DC	5"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K119	00000	00000




												1 1/16" Overall Diameter

												35	K5	600V AC, 300V DC	50,000 amp @ 600V AC 20,000 amp @ 300V DC	5 1/2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K12	00000	00000


												40	K5	600V AC, 300V DC	50,000 amp @ 600V AC 20,000 amp @ 300V DC	5 1/2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K121	00000	00000
												50	K5	600V AC, 300V DC	50,000 amp @ 600V AC 20,000 amp @ 300V DC	5 1/2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K122	00000	00000
												60	K5	600V AC, 300V DC	50,000 amp @ 600V AC 20,000 amp @ 300V DC	5 1/2"	1	Ferrule	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K123	00000	00000




												1 5/16" Overall Diameter

												70	K5	600V AC, 300V DC	50,000 amp @ 600V AC 20,000 amp @ 300V DC	7 7/8"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K149	00000	00000


												80	K5	600V AC, 300V DC	50,000 amp @ 600V AC 20,000 amp @ 300V DC	7 7/8"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K151	00000	00000
												100	K5	600V AC, 300V DC	50,000 amp @ 600V AC 20,000 amp @ 300V DC	7 7/8"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K124	00000	00000




						1 13/16" Overall Diameter

						200	K5							600V AC, 300V DC	50,000 amp @ 600V AC 20,000 amp @ 300V DC	9 5/8"	1	Knife Blade	Fast Acting	No	No	UL Listed, CSA Certified	E2137	012636_0_000	7072K125	00000	00000

UL Class RK5 Fuses


Ferrule Cartridge Fuse, With Blown Fuse Indicator	Ferrule Cartridge Fuse, Without Blown Fuse Indicator

Knife-Blade Cartridge Fuse, With Blown Fuse Indicator	Knife-Blade 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

				6 1/4	RK5	250V AC, 125V DC	200,000 amp @ 250V AC 20,000 amp @ 160V DC	2"	2	Ferrule	Time Delay	No	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K811	000000	000000


				17 1/2	RK5	250V AC, 125V DC	200,000 amp @ 250V AC 20,000 amp @ 160V DC	2"	2	Ferrule	Time Delay	No	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K812	00000	0000




						1 9/16" Overall Diameter

						175	RK5	250V AC, 125V DC	200,000 amp @ 250V AC 20,000 amp @ 250V DC	7 1/8"	2	Knife Blade	Time Delay	No	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K813	00000	00000


						Manufacturer Equivalent Fuse: FLN-R-ID, FRN-R-ID, TR-R-ID







										9/16" Overall Diameter

										5	RK5	250V AC, 125V DC	200,000 amp @ 250V AC 20,000 amp @ 160V DC	2"	2	Ferrule	Time Delay	No	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K814	00000	00000


										6	RK5	250V AC, 125V DC	200,000 amp @ 250V AC 20,000 amp @ 160V DC	2"	2	Ferrule	Time Delay	No	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K815	00000	00000
										8	RK5	250V AC, 160V DC	200,000 amp @ 250V AC 20,000 amp @ 160V DC	2"	2	Ferrule	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K751	00000	00000
										10	RK5	250V AC, 160V DC	200,000 amp @ 250V AC 20,000 amp @ 160V DC	2"	2	Ferrule	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K752	00000	00000
										15	RK5	250V AC, 160V DC	200,000 amp @ 250V AC 20,000 amp @ 160V DC	2"	2	Ferrule	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K761	00000	00000
										20	RK5	250V AC, 160V DC	200,000 amp @ 250V AC 20,000 amp @ 160V DC	2"	2	Ferrule	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K762	00000	0000
										25	RK5	250V AC, 160V DC	200,000 amp @ 250V AC 20,000 amp @ 160V DC	2"	2	Ferrule	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K763	00000	00000
										30	RK5	250V AC, 160V DC	200,000 amp @ 250V AC 20,000 amp @ 160V DC	2"	2	Ferrule	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K764	00000	0000




												13/16" Overall Diameter

												35	RK5	250V AC, 250V DC	200,000 amp @ 250V AC 20,000 amp @ 250V DC	3"	2	Ferrule	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K771	00000	00000


												40	RK5	250V AC, 250V DC	200,000 amp @ 250V AC 20,000 amp @ 250V DC	3"	2	Ferrule	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K772	00000	00000
												45	RK5	250V AC, 250V DC	200,000 amp @ 250V AC 20,000 amp @ 250V DC	3"	2	Ferrule	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K773	00000	00000
												50	RK5	250V AC, 250V DC	200,000 amp @ 250V AC 20,000 amp @ 250V DC	3"	2	Ferrule	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K774	00000	00000
												60	RK5	250V AC, 250V DC	200,000 amp @ 250V AC 20,000 amp @ 250V DC	3"	2	Ferrule	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K775	00000	00000




														1 1/16" Overall Diameter

														70	RK5	250V AC, 250V DC	200,000 amp @ 250V AC 20,000 amp @ 250V DC	5 7/8"	2	Knife Blade	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K781	00000	00000


80														RK5	250V AC, 250V DC	200,000 amp @ 250V AC 20,000 amp @ 250V DC	5 7/8"	2	Knife Blade	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K782	00000	00000
90	RK5													250V AC, 250V DC	200,000 amp @ 250V AC 20,000 amp @ 250V DC	5 7/8"	2	Knife Blade	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K783	00000	00000
100	RK5													250V AC, 250V DC	200,000 amp @ 250V AC 20,000 amp @ 250V DC	5 7/8"	2	Knife Blade	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K784	00000	00000




		1 9/16" Overall Diameter

		125	RK5											250V AC, 250V DC	200,000 amp @ 250V AC 20,000 amp @ 250V DC	7 1/8"	2	Knife Blade	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K791	000000	00000


		150	RK5											250V AC, 250V DC	200,000 amp @ 250V AC 20,000 amp @ 250V DC	7 1/8"	2	Knife Blade	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K792	000000	00000
		200	RK5											250V AC, 250V DC	200,000 amp @ 250V AC 20,000 amp @ 250V DC	7 1/8"	2	Knife Blade	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K793	000000	00000


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







														13/16" Overall Diameter

						6/10	RK5							600V AC, 300V DC	200,000 amp @ 600V AC 20,000 amp @ 600V DC	5"	2	Ferrule	Time Delay	No	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K816	00000	00000


						4 1/2	RK5							600V AC, 300V DC	200,000 amp @ 600V AC 20,000 amp @ 600V DC	5"	2	Ferrule	Time Delay	No	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K817	00000	00000


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







														13/16" Overall Diameter

														8	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	E2137	012636_0_000	7487K216	00000	00000


														10	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	E2137	012636_0_000	7487K217	00000	00000
														12	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	E2137	012636_0_000	7487K316	00000	00000




														1 1/16" Overall Diameter

														35	RK5	600V AC, 300V DC	200,000 amp @ 600V AC 20,000 amp @ 300V DC	5 1/2"	2	Ferrule	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K414	00000	00000


														45	RK5	600V AC, 300V DC	200,000 amp @ 600V AC 20,000 amp @ 300V DC	5 1/2"	2	Ferrule	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K415	00000	00000




													1 5/16" Overall Diameter

													70		RK5	600V AC, 600V DC	200,000 amp @ 600V AC 20,000 amp @ 600V DC	7 7/8"	2	Knife Blade	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K514	00000	00000


													80		RK5	600V AC, 600V DC	200,000 amp @ 600V AC 20,000 amp @ 600V DC	7 7/8"	2	Knife Blade	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K511	00000	00000
													90		RK5	600V AC, 600V DC	200,000 amp @ 600V AC 20,000 amp @ 600V DC	7 7/8"	2	Knife Blade	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K512	00000	00000
													100		RK5	600V AC, 600V DC	200,000 amp @ 600V AC 20,000 amp @ 600V DC	7 7/8"	2	Knife Blade	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K513	00000	00000




													1 13/16" Overall Diameter

													150		RK5	600V AC, 600V DC	200,000 amp @ 600V AC 20,000 amp @ 600V DC	9 5/8"	2	Knife Blade	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K611	000000	000000


													175		RK5	600V AC, 300V DC	200,000 amp @ 600V AC 20,000 amp @ 600V DC	9 5/8"	2	Knife Blade	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K818	000000	000000
													200		RK5	600V AC, 600V DC	200,000 amp @ 600V AC 20,000 amp @ 600V DC	9 5/8"	2	Knife Blade	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K612	000000	000000




													2 9/16" Overall Diameter

				300									RK5		600V AC, 600V DC	200,000 amp @ 600V AC 20,000 amp @ 600V DC	11 5/8"	2	Knife Blade	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K711	000000	000000


				400	RK5								600V AC, 600V DC		200,000 amp @ 600V AC 20,000 amp @ 600V DC	11 5/8"	2	Knife Blade	Time Delay	Yes	Yes	UL Listed, CSA Certified	E2137	012636_0_000	7487K712	000000	000000