Ul Class Rk1 Fast Acting Fuses

	Current Current

	Voltage Voltage

600V AC

250V DC

300V DC

	Fuse Type Fuse Type

	Cartridge

	Overall Length Overall Length

5 1/2"

7 7/8"

	UL Class UL Class

RK1

	Manufacturer Equivalent Manufacturer Equivalent

A6K-R

KLS-R

KTS-R

	Protection Type Protection Type

Fast Acting

	Cartridge Fuse Style Cartridge Fuse Style

Ferrule

Knife Blade

	Breakthrough Current Breakthrough Current

20,000 A @ 250 V DC

20,000 A @ 300 V DC

200,000 A @ 600 V AC

	Number of Elements Number of Elements

	Blown Fuse Indicator Blown Fuse Indicator

	Overall Diameter Overall Diameter

13/16"

1 1/16"

1 5/16"

	Rejection-Style End Rejection-Style End

Yes

	Specifications Met Specifications Met

CSA

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

Forward

How can we improve?

19 Products

Don’t see the fuse you need? Just tell us what you’re looking for and we’ll get it for you.

About Fuses

Ferrule Style

Knife-Blade Style

These fuses open circuits quickly when surges are detected. They have a rejection-style end design that safeguards against replacement errors. 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.

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: A6K-R, KLS-R, KTS-R
1	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	000000	000000
2	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
3	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
4	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
5	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
6	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
8	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
10	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
12	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
15	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
20	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
25	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
30	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
40	600V AC/300V DC	20,000 A @ 300 V DC 200,000 A @ 600 V AC	5 1/2"	1 1/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
50	600V AC/300V DC	20,000 A @ 300 V DC 200,000 A @ 600 V AC	5 1/2"	1 1/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
60	600V AC/300V DC	20,000 A @ 300 V DC 200,000 A @ 600 V AC	5 1/2"	1 1/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
80	600V AC/300V DC	20,000 A @ 300 V DC 200,000 A @ 600 V AC	7 7/8"	1 5/16"	1	Knife Blade	UL Listed, CSA Certified	00000000	000000	000000
90	600V AC/300V DC	20,000 A @ 300 V DC 200,000 A @ 600 V AC	7 7/8"	1 5/16"	1	Knife Blade	UL Listed, CSA Certified	00000000	000000	000000
100	600V AC/300V DC	20,000 A @ 300 V DC 200,000 A @ 600 V AC	7 7/8"	1 5/16"	1	Knife Blade	UL Listed, CSA Certified	00000000	000000	000000

Email Us

About Fuses

UL Class RK1 Fast-Acting Fuses