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.

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Description Datasheet Availability Pricing (GBP) 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 1.5A .093ohms 452 NANO2
Datasheet
2,053In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 5,000

452 Surface Mount Ceramic Fuses Time Delay / Slow Blow 1.5 A 125 VAC 125 VDC 50 A at 125 VAC, 50 A at 125 VDC, 300 A at 32 VDC 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 93 mOhms
Littelfuse Surface Mount Fuses 48VAC 3.15A .045ohms 458 NANO2
Datasheet
2,180In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

458 Surface Mount Fuses Fast Blow 3.15 A 48 VAC 75 VDC 50 A at 48 VAC, 50 A at 75 VDC 3.18 mm x 1.58 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 45 mOhms
Littelfuse Surface Mount Fuses 250VAC 1.6A .0448ohms 464 NANO2
Datasheet
1,618In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

464 Surface Mount Ceramic Fuses Fast Blow 1.6 A 250 VAC 250 VDC 100 A at 250 VAC 12.1 mm x 4.5 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 44.8 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.315A .3918ohms 453 NANO2
Datasheet
1,340In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

453 Surface Mount Ceramic Fuses Fast Blow 315 mA 125 VAC 125 VDC 50 A at 125 VAC, 50 A at 125 VDC, 300 A at 32 VDC 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 391.8 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.16A 1.2157ohms 453 NANO2
Datasheet
579In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

453 Surface Mount Ceramic Fuses Fast Blow 160 mA 125 VAC 125 VDC 50 A at 125 VAC, 50 A at 125 VDC, 300 A at 32 VDC 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 1.2157 Ohms
Littelfuse Surface Mount Fuses 250VAC 6.3A .0093ohms 464 NANO2
Datasheet
1,799In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

464 Surface Mount Ceramic Fuses Fast Blow 6.3 A 250 VAC 250 VDC 100 A at 250 VAC 12.1 mm x 4.5 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 9.3 mOhms
Littelfuse Surface Mount Fuses 250VAC 0.8A .13ohms 462 NANO2
Datasheet
1,444In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

462 Surface Mount Fuses Time Delay / Slow Blow 800 mA 250 VAC 250 VDC 150 A at 250 VAC, 150 A at 250 VDC 10.5 mm x 4.5 mm - 40 C + 85 C Reel, Cut Tape, MouseReel 130 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.375A .6155ohms 448 NANO2
Datasheet
Product Comments
846In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

448 Surface Mount Fuses Fast Blow 375 mA 125 VAC 125 VDC 50 A at 125 VAC, 50 A at 125 VDC 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 615.5 mOhms
Littelfuse Surface Mount Fuses 125VAC 7A .009ohms 448 NANO2
Datasheet
Product Comments
1,466In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

448 Surface Mount Fuses Fast Blow 7 A 125 VAC 125 VDC 50 A at 125 VAC, 50 A at 125 VDC 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 9 mOhms
Littelfuse Surface Mount Fuses 125VAC 3.5A .021ohms 448 NANO2
Datasheet
Product Comments
936In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

448 Surface Mount Fuses Fast Blow 3.5 A 125 VAC 125 VDC 50 A at 125 VAC, 50 A at 125 VDC 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 21 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.5A .7ohms 452 NANO2
Datasheet
739In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 5,000

452 Surface Mount Ceramic Fuses Time Delay / Slow Blow 500 mA 125 VAC 125 VDC 50 A at 125 VAC, 50 A at 125 VDC, 300 A at 32 VDC 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 700 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.75A .1444ohms 453 NANO2
Datasheet
1,515In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

453 Surface Mount Ceramic Fuses Fast Blow 750 mA 125 VAC 125 VDC 50 A at 125 VAC, 50 A at 125 VDC, 300 A at 32 VDC 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 144.4 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.375A .4541ohms 453 NANO2
Datasheet
1,485In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

453 Surface Mount Ceramic Fuses Fast Blow 375 mA 125 VAC 125 VDC 50 A at 125 VAC, 50 A at 125 VDC, 300 A at 32 VDC 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 454.1 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.062A 5.5ohms 451 NANO2
Datasheet
6,710In Stock
4,000Expected 13/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

451 Surface Mount Ceramic Fuses Fast Blow 62 mA 125 VAC 125 VDC 50 A at 125 VAC, 50 A at 125 VDC, 300 A at 32 VDC 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 5.5 Ohms
Littelfuse Surface Mount Fuses 125VAC 10A .0056ohms 451 NANO2
Datasheet
21,833In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

451 Surface Mount Ceramic Fuses Fast Blow 10 A 125 VAC 125 VDC 35 A at 125 VAC, 50 A at 125 VDC, 400 A at 32 VDC 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 5.6 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.5A .7ohms 452 NANO2
Datasheet
15,353In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

452 Surface Mount Ceramic Fuses Time Delay / Slow Blow 500 mA 125 VAC 125 VDC 50 A at 125 VAC, 50 A at 125 VDC, 300 A at 32 VDC 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 700 mOhms
Littelfuse Surface Mount Fuses 125VAC 25A .00192ohms 456 NANO2
Datasheet
7,513In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

456 Surface Mount Ceramic Fuses Fast Blow 25 A 125 VAC 72 VDC 100 A at 125 VAC, 500 A at 72 VDC 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 1.92 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.1A 2.94ohms 448 NANO2
Datasheet
Product Comments
5,131In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

448 Surface Mount Fuses Fast Blow 100 mA 125 VAC 125 VDC 50 A at 125 VAC, 50 A at 125 VDC 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 2.94 Ohms
Littelfuse Surface Mount Fuses 125VAC 0.125A 2.05ohms 448 NANO2
Datasheet
Product Comments
5,542In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

448 Surface Mount Fuses Fast Blow 125 mA 125 VAC 125 VDC 50 A at 125 VAC, 50 A at 125 VDC 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 66.19 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.25A .5765ohms 451 NANO2
Datasheet
2,927In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 5,000

451 Surface Mount Ceramic Fuses Fast Blow 250 mA 125 VAC 125 VDC 50 A at 125 VAC, 50 A at 125 VDC, 300 A at 32 VDC 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 576.5 mOhms
Littelfuse Surface Mount Fuses 250VAC 0.5A .2373ohms 464 NANO2
Datasheet
2,394In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

464 Surface Mount Ceramic Fuses Fast Blow 500 mA 250 VAC 250 VDC 100 A at 250 VAC 12.1 mm x 4.5 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 237.3 mOhms
Littelfuse Surface Mount Fuses 250VAC 1A .0762ohms 464 NANO2
Datasheet
1,899In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

464 Surface Mount Ceramic Fuses Fast Blow 1 A 250 VAC 250 VDC 100 A at 250 VAC 12.1 mm x 4.5 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 76.2 mOhms
Littelfuse Surface Mount Fuses 250VAC 4A .0156ohms 464 NANO2
Datasheet
2,753In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

464 Surface Mount Ceramic Fuses Fast Blow 4 A 250 VAC 250 VDC 100 A at 250 VAC 12.1 mm x 4.5 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 15.6 mOhms
Littelfuse Surface Mount Fuses 250VAC 5A .0119ohms 464 NANO2
Datasheet
2,983In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

464 Surface Mount Ceramic Fuses Fast Blow 5 A 250 VAC 250 VDC 100 A at 250 VAC 12.1 mm x 4.5 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 11.9 mOhms
Littelfuse Surface Mount Fuses 250VAC 2.5A .0288ohms 464 NANO2
Datasheet
3,964In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

464 Surface Mount Ceramic Fuses Fast Blow 2.5 A 250 VAC 250 VDC 100 A at 250 VAC 12.1 mm x 4.5 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 28.8 mOhms