Ul Class K5 Fuses | McMaster-Carr

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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

Fuse Blocks for UL Class Fuses

For 1 Fuse with Box-Lug Terminal

For 2 Fuses with Box-Lug Terminals

For 3 Fuses with Box-Lug Terminals

For technical drawings and 3-D models, click on a part number.

	For Fuse
For No. of Fuses	UL Class	Current, A	Voltage	Wire Connection Type	Specifications Met		Each
For Fuse Manufacturer Equivalent: NON, NLN, OT, REN, RF, RLN
1	H, K5	1/10-30	250V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	00000000	000000
1	H, K5	31-60	250V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	00000000	00000
1	H, K5	61-100	250V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	0000000	00000
2	H, K5	1/10-30	250V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	00000000	00000
2	H, K5	31-60	250V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	00000000	00000
3	H, K5	1/10-30	250V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	00000000	00000
3	H, K5	31-60	250V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	00000000	00000
3	H, K5	61-100	250V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	0000000	000000
For Fuse Manufacturer Equivalent: NOS, NLS, OTS, RES, RFS, RLS
1	H, K5	1/10-30	600V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	00000000	00000
1	H, K5	31-60	600V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	00000000	00000
2	H, K5	1/10-30	600V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	00000000	00000
2	H, K5	31-60	600V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	00000000	00000
3	H, K5	1/10-30	600V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	00000000	00000
3	H, K5	31-60	600V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	00000000	00000
3	H, K5	61-100	600V AC	Box-Lug Terminals	UL Listed, CSA Certified, CE Marked	0000000	000000