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 (IDR) 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 2.5A .02934ohms 448 NANO2
Datasheet
Product Comments
1.576On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.000

448 Surface Mount Fuses Fast Blow 2.5 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 29.34 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.375A 1.513ohms 449 NANO2
Datasheet
Product Comments
1.996On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.000

449 Surface Mount Fuses Time Delay / Slow 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 1.513 Ohms
Littelfuse Surface Mount Fuses 125VAC 4A .0227ohms 449 NANO2
Datasheet
Product Comments
9.176On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.000

449 Surface Mount Fuses Time Delay / Slow Blow 4 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 22.7 mOhms
Littelfuse Surface Mount Fuses 125VAC 4A .0186ohms 452 NANO2
Datasheet
4.980Expected 11/05/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 5.000

452 Surface Mount Fuses Time Delay / Slow Blow 4 A 125 VAC 125 VDC NANO Reel, Cut Tape, MouseReel
Littelfuse Surface Mount Fuses 125VAC 20A .0023ohms 456 NANO2
Datasheet
7.453On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2.500

456 Surface Mount Ceramic Fuses Fast Blow 20 A 125 VAC 100 VDC 100 A at 125 VAC, 300 A at 100 VDC 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 2.3 mOhms
Littelfuse Surface Mount Fuses 48VAC 2A .0695ohms 458 NANO2
Datasheet
10.239On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.500

458 Surface Mount Fuses Fast Blow 2 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 69.5 mOhms
Littelfuse Surface Mount Fuses 32VAC 5A .027ohms 458 NANO2
Datasheet
6.921On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.500

458 Surface Mount Fuses Fast Blow 5 A 32 VAC 75 VDC 50 A at 32 VAC, 50 A at 75 VDC 3.18 mm x 1.58 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 27 mOhms
Littelfuse Surface Mount Fuses 48VAC 2.5A .06ohms 458 NANO2
Datasheet
2.900On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.500

458 Surface Mount Fuses Fast Blow 2.5 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 60 mOhms
Littelfuse Surface Mount Fuses 32VAC 6.3A .0192ohms 458 NANO2
Datasheet
1.500Expected 03/04/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.500

458 Surface Mount Fuses Fast Blow 6.3 A 32 VAC 75 VDC 50 A at 32 VAC, 50 A at 75 VDC 3.18 mm x 1.58 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 19.2 mOhms
Littelfuse Surface Mount Fuses 350VAC 1.6A .0473ohms 885 NANO2
Datasheet
1.500Expected 15/06/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.500

885 Surface Mount Fuses Fast Blow 1.6 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 47.3 mOhms
Littelfuse Surface Mount Fuses 250VAC 5A .0115ohms 443 NANO2
Datasheet
2.779Expected 15/06/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.500

443 Surface Mount Fuses Time Delay / Slow Blow 5 A 250 VAC 125 VDC 50 A at 250 VAC, 100 A at 125 VDC 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 11.5 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.08A 4.05ohms 451 NANO2
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 5.000
Mult.: 5.000
Reel: 5.000

451 Surface Mount Ceramic Fuses Fast Blow 80 mA 125 VAC 125 VDC 300 A at 32 VDC NANO - 55 C + 125 C Reel 4.05 Ohms
Littelfuse Surface Mount Fuses 125VAC 0.1A 3.1ohms 451 NANO2
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 5.000
Mult.: 5.000
Reel: 5.000

451 Surface Mount Ceramic Fuses Fast Blow 100 mA 125 VAC 125 VDC 300 A at 32 VDC NANO - 55 C + 125 C Reel 3.1 Ohms
Littelfuse Surface Mount Fuses 125VAC 0.16A 1.2157ohms 451 NANO2
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 5.000
Mult.: 5.000
Reel: 5.000

451 Surface Mount Ceramic Fuses Fast Blow 160 mA 125 VAC 125 VDC 300 A at 32 VDC NANO - 55 C + 125 C Reel 1.2157 Ohms
Littelfuse Surface Mount Fuses 125VAC 0.2A .8372ohms 451 NANO2
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 5.000
Mult.: 5.000
Reel: 5.000

451 Surface Mount Ceramic Fuses Fast Blow 200 mA 125 VAC 125 VDC 300 A at 32 VDC NANO - 55 C + 125 C Reel 837.2 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.315A .3918ohms 451 NANO2
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 5.000
Mult.: 5.000
Reel: 5.000

451 Surface Mount Ceramic Fuses Fast Blow 315 mA 125 VAC 125 VDC 300 A at 32 VDC NANO - 55 C + 125 C Reel 391.8 mOhms
Littelfuse Surface Mount Fuses 250VAC 3A .028ohms 443 NANO2
Datasheet
Lead-Time 13 Weeks
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.500

443 Surface Mount Fuses Time Delay / Slow Blow 3 A 250 VAC 125 VDC 50 A at 250 VAC, 100 A at 125 VDC 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 28 mOhms
Littelfuse Surface Mount Fuses 250VAC 2.5A .035ohms 443 NANO2
Datasheet
Lead-Time 13 Weeks
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.500

443 Surface Mount Fuses Time Delay / Slow Blow 2.5 A 250 VAC 125 VDC 50 A at 250 VAC, 100 A at 125 VDC 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 35 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.8A .1907ohms 448 NANO2
Datasheet
Product Comments
Non-Stocked Lead-Time 15 Weeks
Min.: 1.000
Mult.: 1.000
Reel: 1.000

448 Surface Mount Fuses Fast Blow 800 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 190.7 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.062A 5.5ohms 451 NANO2
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 5.000
Mult.: 5.000
Reel: 5.000

451 Surface Mount Ceramic Fuses Fast Blow 62 mA 125 VAC 125 VDC 50 A at 125 VAC, 300 A at 32VDC, 50 A at 125 VDC NANO - 55 C + 125 C Reel 5.5 Ohms
Littelfuse Surface Mount Fuses 125VAC 0.375A .4541ohms 451 NANO2
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 5.000
Mult.: 5.000
Reel: 5.000

451 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 454.1 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.4A .4233ohms 451 NANO2
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 5.000
Mult.: 5.000
Reel: 5.000

451 Surface Mount Ceramic Fuses Fast Blow 400 mA 125 VAC 125 VDC 300 A at 32 VDC NANO - 55 C + 125 C Reel 423.3 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.63A .2022ohms 451 NANO2
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 5.000
Mult.: 5.000
Reel: 5.000

451 Surface Mount Ceramic Fuses Fast Blow 630 mA 125 VAC 125 VDC 300 A at 32 VDC NANO - 55 C + 125 C Reel 202.2 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.8A .1355ohms 451 NANO2
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 5.000
Mult.: 5.000
Reel: 5.000

451 Surface Mount Ceramic Fuses Fast Blow 800 mA 125 VAC 125 VDC 300 A at 32 VDC NANO - 55 C + 125 C Reel 135.5 mOhms
Littelfuse Surface Mount Fuses 125VAC 8A .0077ohms 451 NANO2
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 5.000
Mult.: 5.000
Reel: 5.000

451 Surface Mount Ceramic Fuses Fast Blow 8 A 125 VAC 125 VDC 400 A at 32 VDC NANO - 55 C + 125 C Reel 7.7 mOhms