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 (EUR) 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 0.8A .1355ohms 451 NANO2
Datasheet
2 123In Stock
2 000Expected 14/09/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1 000

451 Surface Mount Ceramic Fuses Fast Blow 800 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 135.5 mOhms
Littelfuse Surface Mount Fuses 125VAC 1A .078ohms 451 NANO2
Datasheet
12 486In Stock
40 000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1 000

451 Surface Mount Ceramic Fuses Fast Blow 1 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 78 mOhms
Littelfuse Surface Mount Fuses 125VAC 1A .078ohms 451 NANO2
Datasheet
4 004In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 5 000

451 Surface Mount Ceramic Fuses Fast Blow 1 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 78 mOhms
Littelfuse Surface Mount Fuses 125VAC 2A .0367ohms 451 NANO2
Datasheet
4 397In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 5 000

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 3A .0227ohms 451 NANO2
Datasheet
16 875In Stock
16 000Expected 29/09/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1 000

451 Surface Mount Ceramic Fuses Fast 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 22.7 mOhms
Littelfuse Surface Mount Fuses 125VAC 5A .0125ohms 451 NANO2
Datasheet
1 788In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 5 000

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 7A .009ohms 451 NANO2
Datasheet
18 789In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1 000

451 Surface Mount Ceramic Fuses Fast Blow 7 A 125 VAC 125 VDC 50 A, 50 A, 400 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 9 mOhms
Littelfuse Surface Mount Fuses 125VAC 8A .0077ohms 451 NANO2
Datasheet
9 551In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1 000

451 Surface Mount Ceramic Fuses Fast Blow 8 A 125 VAC 125 VDC 50 A, 50 A, 400 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 7.7 mOhms
Littelfuse Surface Mount Fuses 125VAC 1.5A .063ohms 451 NANO2
Datasheet
26 462In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1 000

451 Surface Mount Ceramic Fuses Fast Blow 1.5 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 63 mOhms
Littelfuse Surface Mount Fuses 65VAC 12A .0049ohms 451 NANO2
Datasheet
4 905In Stock
4 000Expected 14/09/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1 000

451 Surface Mount Ceramic Fuses Fast Blow 12 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 4.9 mOhms
Littelfuse Surface Mount Fuses 125VAC 2.5A .0286ohms 451 NANO2
Datasheet
8 933In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1 000

451 Surface Mount Ceramic Fuses Fast Blow 2.5 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 28.6 mOhms
Littelfuse Surface Mount Fuses 125VAC 3.5A .02ohms 451 NANO2
Datasheet
1 492In Stock
3 000Expected 10/09/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1 000

451 Surface Mount Ceramic Fuses Fast Blow 3.5 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 20 mOhms
Littelfuse Surface Mount Fuses 125VAC 6.3A .0096ohms 451 NANO2
Datasheet
5 201In Stock
6 000Expected 28/12/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1 000

451 Surface Mount Ceramic Fuses Fast Blow 6.3 A 125 VAC 125 VDC 50 A, 50 A, 400 A 6.1 mm x 2.69 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 9.6 mOhms
Littelfuse Surface Mount Fuses 125VAC 1.25A .078ohms 451 NANO2
Datasheet
3 688In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1 000

451 Surface Mount Ceramic Fuses Fast Blow 1.25 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 78 mOhms
Littelfuse Surface Mount Fuses 125VAC 3.15A .0215ohms 451 NANO2
Datasheet
2 407In Stock
4 000Expected 16/03/2027
MouseReel Available
Min.: 1
Mult.: 1
: 1 000

451 Surface Mount Ceramic Fuses Fast Blow 3.15 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 21.5 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.375A 1.2ohms 452 NANO2
Datasheet
6 237In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 5 000

452 Surface Mount Ceramic Fuses Time Delay / Slow Blow 375 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 1.2 Ohms
Littelfuse Surface Mount Fuses 125VAC 0.5A .7ohms 452 NANO2
Datasheet
6 486In Stock
7 000Expected 25/02/2027
MouseReel Available
Min.: 1
Mult.: 1
: 1 000

452 Surface Mount Ceramic Fuses Time Delay / Slow Blow 500 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 700 mOhms
Littelfuse Surface Mount Fuses 125VAC 0.75A .36ohms 452 NANO2
Datasheet
1 634In Stock
6 000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1 000

452 Surface Mount Ceramic Fuses Time Delay / Slow Blow 750 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 360 mOhms
Littelfuse Surface Mount Fuses 125VAC 1A .225ohms 452 NANO2
Datasheet
18 166In Stock
14 000Expected 22/09/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1 000

452 Surface Mount Ceramic Fuses Time Delay / Slow Blow 1 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 225 mOhms
Littelfuse Surface Mount Fuses 125VAC 1A .225ohms 452 NANO2
Datasheet
4 244In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 5 000

452 Surface Mount Ceramic Fuses Time Delay / Slow Blow 1 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 225 mOhms
Littelfuse Surface Mount Fuses 125VAC 2A .0625ohms 452 NANO2
Datasheet
12 563In Stock
30 000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1 000

452 Surface Mount Ceramic Fuses Time Delay / Slow 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 62.5 mOhms
Littelfuse Surface Mount Fuses 125VAC 2A .0625ohms 452 NANO2
Datasheet
4 768In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 5 000

452 Surface Mount Ceramic Fuses Time Delay / Slow 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 62.5 mOhms
Littelfuse Surface Mount Fuses 125VAC 3A .034ohms 452 NANO2
Datasheet
3 418In Stock
10 000Expected 04/02/2027
MouseReel Available
Min.: 1
Mult.: 1
: 5 000

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 4A .0186ohms 452 NANO2
Datasheet
10 923In Stock
15 000Expected 02/11/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1 000

452 Surface Mount Ceramic Fuses Time Delay / Slow 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 18.6 mOhms
Littelfuse Surface Mount Fuses 125VAC 5A .0136ohms 452 NANO2
Datasheet
2 554In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 5 000

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