443 250V Nano²® Fuses

Littelfuse 443 250V Nano²® Fuses are time-lag, surface-mount devices designed to support higher voltage applications that have limited space. These fuses enable compliance with the RoHS directive. They are fully compatible with lead-free solder alloy and higher temperature profiles associated with lead-free assembly. Littelfuse 250V Nano² Fuses are available in ratings of 0.50A to 5.0A. The 443 series is ideal for use in a variety of applications, including AC/DC power adapters, telecom equipment system power applications, portable system built-in AC/DC converters, high voltage DC/DC converters, and lighting systems.

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Description Datasheet Availability Pricing (RON) 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 1A .18ohms 443 NANO2
Datasheet
17.108In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.500

443 Surface Mount Fuses Time Delay / Slow Blow 1 A 250 VAC 125 VDC 50 A, 100 A 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 180 mOhms
Littelfuse Surface Mount Fuses 250VAC 0.5A .6ohms 443 NANO2
Datasheet
5.800In Stock
13.500On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1.500

443 Surface Mount Fuses Time Delay / Slow Blow 500 mA 250 VAC 125 VDC 50 A, 100 A 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 600 mOhms
Littelfuse Surface Mount Fuses 250VAC 0.75A .275ohms 443 NANO2
Datasheet
4.060In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.500

443 Surface Mount Fuses Time Delay / Slow Blow 750 mA 250 VAC 125 VDC 50 A, 100 A 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 275 mOhms
Littelfuse Surface Mount Fuses 250VAC 2A .052ohms 443 NANO2
Datasheet
8.940In 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 4A .016ohms 443 NANO2
Datasheet
4.273In 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
3.470In 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 3A .028ohms 443 NANO2
Datasheet
1.322In Stock
7.500Expected 7/1/2026
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 1.5A .1ohms 443 NANO2
Datasheet
1.275In 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 250VAC 2.5A .035ohms 443 NANO2
Datasheet
219In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.500

443 Surface Mount Fuses Time Delay / Slow Blow 2.5 A 250 VAC 125 VDC 50 A, 100 A 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 35 mOhms
Littelfuse Surface Mount Fuses 250VAC 3.5A .019ohms 443 NANO2
Datasheet
511In Stock
1.500Expected 10/26/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1.500

443 Surface Mount Fuses Time Delay / Slow Blow 3.5 A 250 VAC 125 VDC 50 A, 100 A 10.08 mm x 3.05 mm - 55 C + 125 C Reel, Cut Tape, MouseReel 19 mOhms