Micro™/TR3® Fuses

Littelfuse Micro™/TR3® Fuses offer a 0.002 to 5A operating current, 125V maximum voltage rating, and 10,000A interrupting rating. Littelfuse Micro/TR3 fuses include high-reliability, very fast-acting subminiature radial leaded fuses. 

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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
Current Rating
Voltage Rating AC
Fuse Type
Body Style
Voltage Rating DC
Interrupt Rating
Termination Style
Fuse Size / Group
Minimum Operating Temperature
Maximum Operating Temperature
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Packaging
Littelfuse Fuses with Leads - Through Hole 125V 3A MICRO Very Fast Acting
Datasheet
5,782In Stock
Min.: 1
Mult.: 1

273 PCB Mount Fuses 3 A 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 85 C 27.5 mOhms Bulk
Littelfuse Fuses with Leads - Through Hole 125V .125A MICRO Very Fast Acting
Datasheet
3,062In Stock
Min.: 1
Mult.: 1

273 PCB Mount Fuses 125 mA 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 85 C 1 Ohms Bulk
Littelfuse Fuses with Leads - Through Hole 125V .25A MICRO Very Fast Acting
Datasheet
1,723In Stock
Min.: 1
Mult.: 1

273 PCB Mount Fuses 250 mA 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 85 C 1.75 Ohms Bulk
Littelfuse Fuses with Leads - Through Hole 125V .4A MICRO Very Fast Acting
Datasheet
854In Stock
Min.: 1
Mult.: 1

273 PCB Mount Fuses 400 mA 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 85 C 227 mOhms Bulk
Littelfuse Fuses with Leads - Through Hole 125V 3A MICRO Very Fast Acting
Datasheet
1,337In Stock
Min.: 1
Mult.: 1

272 PCB Mount Fuses 3 A 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 125 C 27.5 mOhms Bulk
Littelfuse Fuses with Leads - Through Hole 125V .031A MICRO Very Fast Acting
Datasheet
421In Stock
Min.: 1
Mult.: 1
No
273 PCB Mount Fuses 31 mA 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 85 C 16 Ohms Bulk
Littelfuse Fuses with Leads - Through Hole 125V .5A MICRO Very Fast Acting
Datasheet
207In Stock
Min.: 1
Mult.: 1

272 PCB Mount Fuses 500 mA 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 125 C 167 mOhms Bulk
Littelfuse Fuses with Leads - Through Hole 125V .002A MICRO Very Fast Acting
Datasheet
27In Stock
Min.: 1
Mult.: 1
No
272 PCB Mount Fuses 2 mA 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 125 C 2.2 kOhms Bulk
Littelfuse Fuses with Leads - Through Hole 125V .05A MICRO Very Fast Acting
Datasheet
9,839In Stock
Min.: 1
Mult.: 1

273 PCB Mount Fuses 50 mA 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 85 C 3.52 Ohms Bulk
Littelfuse Fuses with Leads - Through Hole 125V .062A MICRO Very Fast Acting
Datasheet
212In Stock
Min.: 1
Mult.: 1

273 PCB Mount Fuses 62 mA 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 85 C 2.55 Ohms Bulk
Littelfuse Fuses with Leads - Through Hole 125V .1A MICRO Very Fast Acting
Datasheet
519In Stock
Min.: 1
Mult.: 1

273 PCB Mount Fuses 100 mA 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 85 C 1.38 Ohms Bulk
Littelfuse Fuses with Leads - Through Hole 125V .5A MICRO Very Fast Acting
Datasheet
1,183In Stock
Min.: 1
Mult.: 1

273 PCB Mount Fuses 500 mA 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 85 C 167 mOhms Bulk
Littelfuse Fuses with Leads - Through Hole 125V .6A MICRO Very Fast Acting
Datasheet
665In Stock
Min.: 1
Mult.: 1

273 PCB Mount Fuses 600 mA 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 85 C 430 mOhms Bulk
Littelfuse Fuses with Leads - Through Hole 125V 1A MICRO Very Fast Acting
Datasheet
419In Stock
500Expected 2026-06-03
Min.: 1
Mult.: 1

273 PCB Mount Fuses 1 A 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 85 C 88 mOhms Bulk
Littelfuse Fuses with Leads - Through Hole 125V .015A MICRO Very Fast Acting
Datasheet
63In Stock
Min.: 1
Mult.: 1
No
272 PCB Mount Fuses 15 mA 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 125 C 44 Ohms Bulk
Littelfuse Fuses with Leads - Through Hole 125V .005A MICRO Very Fast Acting
Datasheet
268In Stock
Min.: 1
Mult.: 1
No
273 PCB Mount Fuses 5 mA 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 85 C 280 Ohms Bulk
Littelfuse Fuses with Leads - Through Hole 125V .05A MICRO Very Fast Acting
Datasheet
15In Stock
Min.: 1
Mult.: 1

272 PCB Mount Fuses 50 mA 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 125 C 3.52 Ohms Bulk
Littelfuse Fuses with Leads - Through Hole 125V 1.5A MICRO Very Fast Acting
Datasheet
160In Stock
Min.: 1
Mult.: 1

272 PCB Mount Fuses 1.5 A 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 125 C 57.8 mOhms Bulk
Littelfuse Fuses with Leads - Through Hole 125V .2A MICRO Very Fast Acting
Datasheet
96In Stock
Min.: 1
Mult.: 1

273 PCB Mount Fuses 200 mA 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 85 C 2.3 Ohms Bulk
Littelfuse Fuses with Leads - Through Hole 125V .3A MICRO Very Fast Acting
Datasheet
12In Stock
Min.: 1
Mult.: 1

273 PCB Mount Fuses 300 mA 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 85 C 1.25 Ohms Bulk
Littelfuse Fuses with Leads - Through Hole 125V V/FA MICRO .500A
Datasheet
73In Stock
Min.: 1
Mult.: 1

273 PCB Mount Fuses 500 mA 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 85 C 167 mOhms Bulk
Littelfuse Fuses with Leads - Through Hole 125V V/FA MICRO 1A
Datasheet
1In Stock
55Expected 2026-03-30
Min.: 1
Mult.: 1

273 PCB Mount Fuses 1 A 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 85 C 88 mOhms Bulk
Littelfuse Fuses with Leads - Through Hole 125V V/FA MICRO 2A
Datasheet
25In Stock
Min.: 1
Mult.: 1

273 PCB Mount Fuses 2 A 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 85 C 42.5 mOhms Bulk
Littelfuse Fuses with Leads - Through Hole 125V V/FA MICRO 3A
Datasheet
56In Stock
Min.: 1
Mult.: 1

273 PCB Mount Fuses 3 A 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 85 C 27.5 mOhms Bulk
Littelfuse Fuses with Leads - Through Hole 2A, 125V FM02A Mil Micro Fuse
Datasheet
2In Stock
Min.: 1
Mult.: 1

274 Hi-Rel Fuses 2 A 125 VAC Fast Blow Leaded Fuses 125 VDC 10 kA at 125 VDC Radial MICRO - 55 C + 85 C 42.5 mOhms Bulk