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 (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 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
4,984In Stock
15,000On 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
3,080In 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 125VAC 0.062A 5.56ohms 448 NANO2
Datasheet
Product Comments
5,656In Stock
4,000Expected 19/11/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

448 Surface Mount Fuses Fast Blow 62 mA 125 VAC 125 VDC 50 A, 50 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 5.56 Ohms
Littelfuse Surface Mount Fuses 125VAC 0.1A 2.94ohms 448 NANO2
Datasheet
Product Comments
3,404In Stock
7,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

448 Surface Mount Fuses Fast Blow 100 mA 125 VAC 125 VDC 50 A, 50 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 2.94 Ohms
Littelfuse Surface Mount Fuses 125VAC 0.16A 1.67ohms 448 NANO2
Datasheet
Product Comments
840In Stock
1,000Expected 29/09/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

448 Surface Mount Fuses Fast Blow 160 mA 125 VAC 125 VDC 50 A, 50 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 1.67 Ohms
Littelfuse Surface Mount Fuses 125VAC 0.25A .95ohms 448 NANO2
Datasheet
Product Comments
2,896In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

448 Surface Mount Fuses Fast Blow 250 mA 125 VAC 125 VDC 50 A, 50 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 950 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.63A .3125ohms 448 NANO2
Datasheet
Product Comments
1,698In Stock
3,000Expected 05/11/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

448 Surface Mount Fuses Fast Blow 630 mA 125 VAC 125 VDC 50 A, 50 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 312.5 mOhms
Littelfuse Surface Mount Fuses 125VAC 2A .03529ohms 448 NANO2
Datasheet
Product Comments
5,852In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

448 Surface Mount Fuses Fast Blow 2 A 125 VAC 125 VDC 50 A, 50 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 35.29 mOhms
Littelfuse Surface Mount Fuses 125VAC 3A .02445ohms 448 NANO2
Datasheet
Product Comments
1,950In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

448 Surface Mount Fuses Fast Blow 3 A 125 VAC 125 VDC 50 A, 50 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 24.45 mOhms
Littelfuse Surface Mount Fuses 125VAC 4A .01577ohms 448 NANO2
Datasheet
Product Comments
2,068In Stock
2,000Expected 02/11/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

448 Surface Mount Fuses Fast Blow 4 A 125 VAC 125 VDC 50 A, 50 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 15.77 mOhms
Littelfuse Surface Mount Fuses 125VAC 5A .01531ohms 448 NANO2
Datasheet
Product Comments
1,731In Stock
3,000Expected 29/09/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

448 Surface Mount Fuses Fast Blow 5 A 125 VAC 125 VDC 50 A, 50 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 15.31 mOhms
Littelfuse Surface Mount Fuses 125VAC 8A .0078ohms 448 NANO2
Datasheet
Product Comments
2,376In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

448 Surface Mount Fuses Fast Blow 8 A 125 VAC 125 VDC 50 A, 50 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 7.8 mOhms
Littelfuse Surface Mount Fuses 125VAC 10A .007ohms 448 NANO2
Datasheet
Product Comments
2,469In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

448 Surface Mount Fuses Fast Blow 10 A 125 VAC 125 VDC 35 A, 50 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 7 mOhms
Littelfuse Surface Mount Fuses 65VAC 12A .00533ohms 448 NANO2
Datasheet
Product Comments
5,596In Stock
10,400On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

448 Surface Mount Fuses Fast Blow 12 A 65 VAC 85 VDC 50 A, 200 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 5.33 mOhms
Littelfuse Surface Mount Fuses 65VAC 15A .00394ohms 448 NANO2
Datasheet
Product Comments
4,451In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

448 Surface Mount Fuses Fast Blow 15 A 65 VAC 85 VDC 50 A, 200 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 3.94 mOhms
Littelfuse Surface Mount Fuses 125VAC 2.5A .02934ohms 448 NANO2
Datasheet
Product Comments
3,627In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

448 Surface Mount Fuses Fast Blow 2.5 A 125 VAC 125 VDC 50 A, 50 A 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
5,793In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

449 Surface Mount Fuses Time Delay / Slow Blow 375 mA 125 VAC 125 VDC 50 A, 50 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 1.513 Ohms
Littelfuse Surface Mount Fuses 125VAC 1A .2516ohms 449 NANO2
Datasheet
Product Comments
8,503In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

449 Surface Mount Fuses Time Delay / Slow Blow 1 A 125 VAC 125 VDC 50 A, 50 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 251.6 mOhms
Littelfuse Surface Mount Fuses 125VAC 2A .0708ohms 449 NANO2
Datasheet
Product Comments
8,457In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

449 Surface Mount Fuses Time Delay / Slow Blow 2 A 125 VAC 125 VDC 50 A, 50 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 70.8 mOhms
Littelfuse Surface Mount Fuses 125VAC 3A .0352ohms 449 NANO2
Datasheet
Product Comments
4,584In Stock
5,000Expected 29/09/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

449 Surface Mount Fuses Time Delay / Slow Blow 3 A 125 VAC 125 VDC 50 A, 50 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 35.2 mOhms
Littelfuse Surface Mount Fuses 125VAC 5A .0171ohms 449 NANO2
Datasheet
Product Comments
2,125In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

449 Surface Mount Fuses Time Delay / Slow Blow 5 A 125 VAC 125 VDC 50 A, 50 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 17.1 mOhms
Littelfuse Surface Mount Fuses 125VAC 1.5A .1186ohms 449 NANO2
Datasheet
Product Comments
2,277In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

449 Surface Mount Fuses Time Delay / Slow Blow 1.5 A 125 VAC 125 VDC 50 A, 50 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 118.6 mOhms