Littelfuse-Type LLN-RK Fuses

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Current

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Overall Length

Manufacturer Equivalent Fuse

Cartridge Fuse Type

Overall Diameter

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Breakthrough Current @ Voltage

300,000 amp @ 250V AC

100,000 amp @ 125V DC

100,000 amp @ 250V DC

Length

5 7/8"

7 1/8"

8 5/8"

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19 Products

UL Class RK1 Time-Delay Fuses


Ferrule Cartridge Fuse	Knife-Blade 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

				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	000000000	000000	000000


				1	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	000000000	00000	00000
				1 1/4	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	000000000	00000	00000
				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	000000000	00000	00000
				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	000000000	00000	00000
				3	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	000000000	00000	00000
				5	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	000000000	00000	00000
				6	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	000000000	00000	00000
				10	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	000000000	00000	00000
				15	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	000000000	00000	00000
				20	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	000000000	00000	00000


				30	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	000000000	00000	00000




						13/16" Overall Diameter

						40	RK1	250V AC, 125V DC	300,000 amp @ 250V AC 100,000 amp @ 125V DC	3"	2	Ferrule	Time Delay	No	Yes	UL Listed, CSA Certified	000000000	00000	00000


						50	RK1	250V AC, 125V DC	300,000 amp @ 250V AC 100,000 amp @ 125V DC	3"	2	Ferrule	Time Delay	No	Yes	UL Listed, CSA Certified	000000000	00000	00000
						60	RK1	250V AC, 125V DC	300,000 amp @ 250V AC 100,000 amp @ 125V DC	3"	2	Ferrule	Time Delay	No	Yes	UL Listed, CSA Certified	000000000	00000	00000




								1 3/16" Overall Diameter

								100	RK1	250V AC, 250V DC	300,000 amp @ 250V AC 100,000 amp @ 250V DC	5 7/8"	2	Knife Blade	Time Delay	No	Yes	UL Listed, CSA Certified	00000000	00000	00000




										1 11/16" Overall Diameter

										125	RK1	250V AC, 250V DC	300,000 amp @ 250V AC 100,000 amp @ 250V DC	7 1/8"	2	Knife Blade	Time Delay	No	Yes	UL Listed, CSA Certified	000000000	00000	00000


										200	RK1	250V AC, 250V DC	300,000 amp @ 250V AC 100,000 amp @ 250V DC	7 1/8"	2	Knife Blade	Time Delay	No	Yes	UL Listed, CSA Certified	00000000	00000	00000




												2 3/8" Overall Diameter

												400	RK1	250V AC, 250V DC	300,000 amp @ 250V AC 100,000 amp @ 250V DC	8 5/8"	2	Knife Blade	Time Delay	No	Yes	UL Listed, CSA Certified	00000000	000000	000000