Ul Class K5 Fuses | McMaster-Carr

	Current Current

	Voltage Voltage

	Overall Length Overall Length

	Overall Diameter Overall Diameter

	Fuse Type Fuse Type

	Cartridge

	Manufacturer Equivalent Manufacturer Equivalent

	UL Class UL Class

	Protection Type Protection Type

Fast Acting

	Cartridge Fuse Style Cartridge Fuse Style

Ferrule

Knife Blade

	Breakthrough Current Breakthrough Current

	Specifications Met Specifications Met

CSA

CE Marked

	Number of Elements Number of Elements

	Blown Fuse Indicator Blown Fuse Indicator

	Rejection-Style End Rejection-Style End

	CSA File Number CSA File Number

053787_C_000

012636_0_000

	UL File Number UL File Number

E4273

E2137

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

DFARS Specialty Metals
COTS-Exempt

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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About Fuses

Ferrule Style

Knife-Blade Style

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, 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: NLN, NON, OT
1	250V AC/125V DC	50,000 A @ 125 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified, CE Marked	00000000	000000	000000
2	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
3	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
4	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
5	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
6	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
7	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
8	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
10	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
12	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
15	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
20	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
25	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
30	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
35	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	3"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
40	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	3"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
45	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	3"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
50	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	3"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
60	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	3"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
70	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	5 7/8"	1 1/16"	1	Knife Blade	UL Listed, CSA Certified	00000000	00000	00000
80	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	5 7/8"	1 1/16"	1	Knife Blade	UL Listed, CSA Certified	00000000	00000	00000
100	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	5 7/8"	1 1/16"	1	Knife Blade	UL Listed, CSA Certified	00000000	00000	00000
200	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	7 1/8"	1 9/16"	1	Knife Blade	UL Listed, CSA Certified	00000000	00000	00000
Manufacturer Equivalent: NLS, NOS, OTS
3	600V AC/300V DC	20,000 A @ 300 V DC 50,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
5	600V AC/300V DC	20,000 A @ 300 V DC 50,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
10	600V AC/300V DC	20,000 A @ 300 V DC 50,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
15	600V AC/300V DC	20,000 A @ 300 V DC 50,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
20	600V AC/300V DC	20,000 A @ 300 V DC 50,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
25	600V AC/300V DC	20,000 A @ 300 V DC 50,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
30	600V AC/300V DC	20,000 A @ 300 V DC 50,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
35	600V AC/300V DC	20,000 A @ 300 V DC 50,000 A @ 600 V AC	5 1/2"	1 1/16"	1	Ferrule	UL Listed, CSA Certified	0000000	00000	00000
40	600V AC/300V DC	20,000 A @ 300 V DC 50,000 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 50,000 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 50,000 A @ 600 V AC	5 1/2"	1 1/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
70	600V AC/300V DC	20,000 A @ 300 V DC 50,000 A @ 600 V AC	7 7/8"	1 5/16"	1	Knife Blade	UL Listed, CSA Certified	00000000	00000	00000
80	600V AC/300V DC	20,000 A @ 300 V DC 50,000 A @ 600 V AC	7 7/8"	1 5/16"	1	Knife Blade	UL Listed, CSA Certified	00000000	00000	00000
100	600V AC/300V DC	20,000 A @ 300 V DC 50,000 A @ 600 V AC	7 7/8"	1 5/16"	1	Knife Blade	UL Listed, CSA Certified	00000000	00000	00000
200	600V AC/300V DC	20,000 A @ 300 V DC 50,000 A @ 600 V AC	9 5/8"	1 13/16"	1	Knife Blade	UL Listed, CSA Certified	00000000	00000	00000