NANO Fuses

Littelfuse NANO® Fuses are fast-acting, high-performance fuses available in a wide range of available current ratings. The portfolio includes 448 NANO2® SMF Fuses, which are fast-acting fuses available in current ratings from 62mA to 15A. The 443 NANO2 series features square surface-mount, time-lag devices with a 250VAC voltage rating. Littelfuse 449 NANO2 Slo-Blo® Fuses offer enhanced inrush withstand characteristics over NANO2 Fast-Acting Fuses. The 456 series is designed to support higher current requirements and is fully compatible with lead-free solder alloys. Littelfuse 456 fuses are ideal for storage system powers, cooling fan systems for PC servers, and base station power supplies. Littelfuse NANO Fuses include additional series as well.

Results: 230
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Description Datasheet Availability Pricing (TWD) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Series
Product
Fuse Type
Current Rating
Voltage Rating AC
Voltage Rating DC
Interrupt Rating
Fuse Size / Group
Minimum Operating Temperature
Maximum Operating Temperature
Packaging
Resistance
Littelfuse Surface Mount Fuses 125VAC 3.15A .023ohms 448 NANO2
Datasheet
Product Comments
725In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

448 Surface Mount Fuses Fast Blow 3.15 A 125 VAC 125 VDC 50 A, 50 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 701.5 mOhms
Littelfuse Surface Mount Fuses 125VAC 4A .016ohms 451 NANO2
Datasheet
791In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 5,000

451 Surface Mount Ceramic Fuses Fast Blow 4 A 125 VAC 125 VDC 50 A, 50 A, 300 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 16 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.062A 5.5ohms 451 NANO2
Datasheet
5,216In Stock
3,000Expected 4/20/2027
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

451 Surface Mount Ceramic Fuses Fast Blow 62 mA 125 VAC 125 VDC 50 A, 50 A, 300 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 5.5 Ohms
Littelfuse Surface Mount Fuses 125VAC 0.25A .5765ohms 451 NANO2
Datasheet
19,187In Stock
20,000Expected 10/7/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

451 Surface Mount Ceramic Fuses Fast Blow 250 mA 125 VAC 125 VDC 50 A, 50 A, 300 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 576.5 mOhms
Littelfuse Surface Mount Fuses 125VAC 2A .0367ohms 451 NANO2
Datasheet
49,639In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

451 Surface Mount Ceramic Fuses Fast Blow 2 A 125 VAC 125 VDC 50 A, 50 A, 300 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 36.7 mOhms
Littelfuse Surface Mount Fuses 125VAC 4A .016ohms 451 NANO2
Datasheet
32,941In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

451 Surface Mount Ceramic Fuses Fast Blow 4 A 125 VAC 125 VDC 50 A, 50 A, 300 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 16 mOhms
Littelfuse Surface Mount Fuses 125VAC 5A .0125ohms 451 NANO2
Datasheet
53,432In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

451 Surface Mount Ceramic Fuses Fast Blow 5 A 125 VAC 125 VDC 50 A, 50 A, 300 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 12.5 mOhms
Littelfuse Surface Mount Fuses 125VAC 10A .0056ohms 451 NANO2
Datasheet
32,915In Stock
18,000Expected 3/1/2027
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

451 Surface Mount Ceramic Fuses Fast Blow 10 A 125 VAC 125 VDC 35 A, 50 A, 400 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 5.6 mOhms
Littelfuse Surface Mount Fuses 65VAC 15A .0037ohms 451 NANO2
Datasheet
23,142In Stock
29,000Expected 10/26/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

451 Surface Mount Ceramic Fuses Fast Blow 15 A 65 VAC 65 VDC 100 A, 150 A, 400 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 3.7 mOhms
Littelfuse Surface Mount Fuses 125VAC 3A .034ohms 452 NANO2
Datasheet
27,263In Stock
20,000Expected 9/3/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

452 Surface Mount Ceramic Fuses Time Delay / Slow Blow 3 A 125 VAC 125 VDC 50 A, 50 A, 300 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 34 mOhms
Littelfuse Surface Mount Fuses 125VAC 5A .0136ohms 452 NANO2
Datasheet
57,938In Stock
33,000Expected 9/29/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

452 Surface Mount Ceramic Fuses Time Delay / Slow Blow 5 A 125 VAC 125 VDC 50 A, 50 A, 300 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 13.6 mOhms
Littelfuse Surface Mount Fuses 72VAC 7A .0105ohms 452 NANO2
Datasheet
8,900In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

452 Surface Mount Ceramic Fuses Time Delay / Slow Blow 7 A 72 VAC 60 VDC 50 A, 50 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 10.5 mOhms
Littelfuse Surface Mount Fuses 125VAC 30A .00132ohms 456 NANO2
Datasheet
32,386In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

456 Surface Mount Ceramic Fuses Fast Blow 30 A 125 VAC 72 VDC 100 A, 500 A 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 1.32 mOhms
Littelfuse Surface Mount Fuses VAC 40A .00105ohms 456 NANO2
Datasheet
19,007In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

456 Surface Mount Ceramic Fuses Fast Blow 40 A 60 VDC 180 A 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 1.05 mOhms
Littelfuse Surface Mount Fuses 600VAC 2A .045ohms 461 NANO2
Datasheet
25,058In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

461 Surface Mount Ceramic Fuses Time Delay / Slow Blow 2 A 600 VAC 80 VDC 60 A 10.1 mm x 3.12 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 45 mOhms
Littelfuse Surface Mount Fuses 350VAC 3.15A .0196ohms 885 NANO2
Datasheet
8,381In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

885 Surface Mount Fuses Fast Blow 3.15 A 350 VAC 500 VDC 100 A, 100 A 10.86 mm x 4.78 mm - 40 C + 105 C Reel, Cut Tape, MouseReel 19.6 mOhms
Littelfuse Surface Mount Fuses 250VAC 0.5A .6ohms 443 NANO2
Datasheet
16,436In Stock
13,500Expected 9/11/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

443 Surface Mount Fuses Time Delay / Slow Blow 500 mA 250 VAC 125 VDC 50 A, 100 A 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 600 mOhms
Littelfuse Surface Mount Fuses 250VAC 0.75A .275ohms 443 NANO2
Datasheet
4,060In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

443 Surface Mount Fuses Time Delay / Slow Blow 750 mA 250 VAC 125 VDC 50 A, 100 A 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 275 mOhms
Littelfuse Surface Mount Fuses 250VAC 1A .18ohms 443 NANO2
Datasheet
15,356In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

443 Surface Mount Fuses Time Delay / Slow Blow 1 A 250 VAC 125 VDC 50 A, 100 A 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 180 mOhms
Littelfuse Surface Mount Fuses 250VAC 2A .052ohms 443 NANO2
Datasheet
12,482In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

443 Surface Mount Fuses Time Delay / Slow Blow 2 A 250 VAC 125 VDC 50 A, 100 A 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 52 mOhms
Littelfuse Surface Mount Fuses 250VAC 3A .028ohms 443 NANO2
Datasheet
9,484In Stock
10,500On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

443 Surface Mount Fuses Time Delay / Slow Blow 3 A 250 VAC 125 VDC 50 A, 100 A 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 28 mOhms
Littelfuse Surface Mount Fuses 250VAC 4A .016ohms 443 NANO2
Datasheet
4,218In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

443 Surface Mount Fuses Time Delay / Slow Blow 4 A 250 VAC 125 VDC 50 A, 100 A 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 16 mOhms
Littelfuse Surface Mount Fuses 250VAC 5A .0115ohms 443 NANO2
Datasheet
3,020In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

443 Surface Mount Fuses Time Delay / Slow Blow 5 A 250 VAC 125 VDC 50 A, 100 A 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 11.5 mOhms
Littelfuse Surface Mount Fuses 250VAC 1.5A .1ohms 443 NANO2
Datasheet
2,655In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

443 Surface Mount Fuses Time Delay / Slow Blow 1.5 A 250 VAC 125 VDC 50 A, 100 A 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 100 mOhms
Littelfuse Surface Mount Fuses 250VAC 2.5A .035ohms 443 NANO2
Datasheet
4,619In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

443 Surface Mount Fuses Time Delay / Slow Blow 2.5 A 250 VAC 125 VDC 50 A, 100 A 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 35 mOhms