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: 236
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Description Datasheet Availability Pricing (CAD) 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 10A .0056ohms 453 NANO2
Datasheet
4,498In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

453 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 454 NANO2
Datasheet
3,139In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

454 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 .36ohms 454 NANO2
Datasheet
1,699In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

454 Surface Mount Ceramic Fuses Time Delay / Slow 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 360 mOhms
Littelfuse Surface Mount Fuses 125VAC 1A .225ohms 454 NANO2
Datasheet
3,689In Stock
2,000Expected 2026-06-04
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

454 Surface Mount Ceramic Fuses Time Delay / Slow Blow 1 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 225 mOhms
Littelfuse Surface Mount Fuses 125VAC 2A .0625ohms 454 NANO2
Datasheet
4,202In Stock
4,000Expected 2026-04-10
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

454 Surface Mount Ceramic Fuses Time Delay / Slow Blow 2 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 62.5 mOhms
Littelfuse Surface Mount Fuses 125VAC 3A .034ohms 454 NANO2
Datasheet
6,253In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

454 Surface Mount Ceramic Fuses Time Delay / Slow Blow 3 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 34 mOhms
Littelfuse Surface Mount Fuses 125VAC 4A .0186ohms 454 NANO2
Datasheet
2,008In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

454 Surface Mount Ceramic Fuses Time Delay / Slow Blow 4 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 18.6 mOhms
Littelfuse Surface Mount Fuses 125VAC 1.5A .093ohms 454 NANO2
Datasheet
1,918In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

454 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 125VAC 2.5A .045ohms 454 NANO2
Datasheet
2,599In Stock
2,000Expected 2026-03-17
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

454 Surface Mount Ceramic Fuses Time Delay / Slow Blow 2.5 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 45 mOhms
Littelfuse Surface Mount Fuses FUSE 125V V/FA NANO2 W/ Au Caps RoHS 20A
Datasheet
2,389In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

456 Surface Mount Fuses Fast Blow 20 A 100 VDC 100 A at 125 VAC, 300 A at 65 VAC, 300 A at 100 VDC, 1 kA at 32 VDC, 500 A at 72 VDC NANO - 55 C + 125 C Reel, Cut Tape, MouseReel 2.3 mOhms
Littelfuse Surface Mount Fuses 125VAC 25A .00192ohms 456 NANO2
Datasheet
7,615In 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 30A .00132ohms 456 NANO2
Datasheet
4,491In Stock
10,000On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

456 Surface Mount Ceramic Fuses Fast Blow 30 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 1.32 mOhms
Littelfuse Surface Mount Fuses 40A 125V HI CURRENT
Datasheet
1,030In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

456SD Surface Mount Ceramic Fuses Fast Blow 40 A 125 VAC 75 VDC 100 A at 125 VAC, 600 A at 75 VDC 12.2 mm x 4.5 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 1.3 mOhms
Littelfuse Surface Mount Fuses 50A 125V HI CURRENT
Datasheet
1,420In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

456SD Surface Mount Ceramic Fuses Fast Blow 50 A 125 VAC 75 VDC 100 A at 125 VAC, 600 A at 75 VDC 12.2 mm x 4.5 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 1.05 mOhms
Littelfuse Surface Mount Fuses 48VAC 1A .18ohms 458 NANO2
Datasheet
2,285In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

458 Surface Mount Fuses Fast Blow 1 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 180 mOhms
Littelfuse Surface Mount Fuses 32VAC 8A .0058ohms 458 NANO2
Datasheet
5,797In Stock
3,000Expected 2026-06-05
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

458 Surface Mount Fuses Fast Blow 8 A 32 VAC 63 VDC 50 A at 32 VAC, 50 A at 63 VDC 3.18 mm x 1.58 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 5.8 mOhms
Littelfuse Surface Mount Fuses 48VAC 1.6A .092ohms 458 NANO2
Datasheet
2,122In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

458 Surface Mount Fuses Fast Blow 1.6 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 92 mOhms
Littelfuse Surface Mount Fuses 32VAC 10A .00465ohms 458 NANO2
Datasheet
3,011In Stock
7,500Expected 2026-06-05
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

458 Surface Mount Fuses Fast Blow 10 A 32 VAC 63 VDC 50 A at 32 VAC, 50 A at 63 VDC 3.18 mm x 1.58 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 4.65 mOhms
Littelfuse Surface Mount Fuses 600VAC 0.5A .56ohms 461 NANO2
Datasheet
4,494In Stock
7,734Expected 2026-05-29
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

461 Surface Mount Ceramic Fuses Time Delay / Slow Blow 500 mA 600 VAC 80 VDC 60 A at 600 VAC 10.1 mm x 3.12 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 560 mOhms
Littelfuse Surface Mount Fuses 600VAC 2A .045ohms 461 NANO2
Datasheet
7,259In Stock
5,000Expected 2026-05-28
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

461 Surface Mount Ceramic Fuses Time Delay / Slow Blow 2 A 600 VAC 80 VDC 60 A at 600 VAC 10.1 mm x 3.12 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 45 mOhms
Littelfuse Surface Mount Fuses 600VAC 1.25A .104ohms 461 NANO2
Datasheet
18,812In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

461 Surface Mount Ceramic Fuses Time Delay / Slow Blow 1.25 A 600 VAC 80 VDC 60 A at 600 VAC 10.1 mm x 3.12 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 104 mOhms
Littelfuse Surface Mount Fuses 250VAC 4A .016ohms 465 NANO2
Datasheet
2,220In Stock
1,500Expected 2026-03-09
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

465 Surface Mount Ceramic Fuses Time Delay / Slow 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 16 mOhms
Littelfuse Surface Mount Fuses 350VAC 2A .0322ohms 885 NANO2
Datasheet
1,014In Stock
1,500Expected 2026-04-10
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

885 Surface Mount Fuses Fast Blow 2 A 350 VAC 500 VDC 100 A at 350 VAC, 100 A at 500 VDC 10.86 mm x 4.78 mm - 40 C + 105 C Reel, Cut Tape, MouseReel 32.2 mOhms
Littelfuse Surface Mount Fuses 350VAC 2.5A .0267ohms 885 NANO2
Datasheet
2,277In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

885 Surface Mount Fuses Fast Blow 2.5 A 350 VAC 500 VDC 100 A at 350 VAC, 100 A at 500 VDC 10.86 mm x 4.78 mm - 40 C + 105 C Reel, Cut Tape, MouseReel 26.7 mOhms
Littelfuse Surface Mount Fuses 350VAC 1.25A .063ohms 885 NANO2
Datasheet
1,016In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

885 Surface Mount Fuses Fast Blow 1.25 A 350 VAC 500 VDC 100 A NANO2 - 40 C + 85 C Reel, Cut Tape, MouseReel 63 mOhms