Bussmann-Type FNM Fuses | McMaster-Carr

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About Fuses

Able to withstand current overload for a short time, these fuses will not open when exposed to harmless temporary surges, such as when starting a motor. Use them to protect equipment—they are not designed for power distribution circuits. Designed for use with Fuse Blocks for Midget 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: FLM, FNM, TRM
1/4	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	00000	00000
1/2	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
6/10	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
8/10	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
1	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
1 1/4	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
1 6/10	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
1 8/10	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
2	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
2 1/4	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
2 1/2	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
3	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
3 2/10	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
4	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
4 1/2	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
5	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
6	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
6 1/4	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
7	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
8	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
10	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
12	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
15	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
20	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
25	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000
30	250V AC	10,000 A @ 250 V AC	1 1/2"	13/32"	1	Ferrule	UL Listed, CSA Certified	0000000	0000	0000

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About Fuses

Time-Delay Midget Fuses