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Fuses

Fuses are necessary parts of electrical systems, giving overcurrent protection by interrupting excessive current flow to keep circuits and equipment from being damaged. These devices, which include kinds such as cartridge fuses, glass fuses, and auto fuses, work by utilizing a fuse wire or link that melts when the current exceeds the rated capacity, effectively breaking the circuit. Their use is widespread in many areas, like cars, factories, and homes, where they help keep the safe operation of electrical equipment running smoothly and without excessive interruption.

Distinct functions are served by automotive fuses and medium-voltage fuses. The former is found in vehicle electrical systems, while the latter is used in applications requiring high power, like transformers and motors. Fuses must be selected according to voltage, current rating, and breaking capacity—more or less, an electrical "must not exceed" specification—that guarantee fuse compatibility with diverse vehicular and industrial power systems. Incandescent burn-out indicators (a good way to tell a fuse is blown) are available on some modern fuses; the visual indication makes it quicker and easier to find problematic fuses.

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Found 19073 items
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Eaton (657)
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Fuse Protection Type
All General Purpose Circuits (211)
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Fuse Type (UL)
2AG (5X15mm) (86)
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5X20mm (399)
ATO (10)
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Fuse Amperage Rating
.175 Amp (1)
.35 Amp (3)
0.002 Amp (5)
0.005 Amp (5)
0.01 Amp (18)
0.015 Amp (5)
0.017 Amp (5)
0.031 Amp (10)
0.032 Amp (17)
0.04 Amp (12)
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12 Volts (1)
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Series
Amp-Trap® (712)
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Fuse Response Time
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Medium-Acting/Medium Time Lag/Medium Time Delay (96)
One Time Use (154)
Slo-Blo/Time Lag (T)/Time Delay (1557)
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Very Fast-Acting (489)
Fuse Size
0.25" X 1.25" (83)
0.406" X 1.31" (11)
0.406" X 1.375" (2)
0.406" X 1.41" (1)
0.406" X 1.5" (2)
0.406" X 1.62" (2)
0.406" X 2.25" (5)
0.41" X 0.88" (8)
0.41" X 1.25" (76)
0.41" X 1.375" (36)
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(CL)
000 (1)
MUST BUY IN PACKS OF 10 (2005)
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MUST BUY IN PACKS OF 1000 (1)
MUST BUY IN PACKS OF 12 (43)
MUST BUY IN PACKS OF 15 (3)
MUST BUY IN PACKS OF 2 (226)
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MUST BUY IN PACKS OF 24 (4)
MUST BUY IN PACKS OF 25 (84)
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LED (87)
Interrupt Rating
10 Ka (4)
10 Ka @ 125 Volts (77)
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100 Ka @ 600 Volts (5)
120 Ka @ 400 Volts (8)
Number of Conductors
10 (4)
13 (8)
14 (6)
16 (2)
2 (9)
32 (2)
4 (9)
5 (3)
6 (3)
7 (12)
Number of Poles
1 Pole (868)
15 Pole (4)
2 Pole (496)
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39 Pole (1)
4 Pole (104)
5 Pole (1)
57 Pole (4)
6 Pole (4)
Wire Gauge
2/0-12 AWG (6)
2/0-14 AWG (6)
350-6 AWG (18)
4/0-6 AWG (3)
500-3/0 AWG (2)
500-4 AWG (27)
500-6 AWG (3)
600-250 MCM (2)
750-250 MCM (2)
Normally In Stock
Optifuse FSC 1/8 Fuse Glass Fuses 0.125 Amps
Free U.S Ground shipping
$1.03
$0.86
Normally In Stock
Optifuse FSC 1/2 Fuse Glass Fuses 0.5 Amps
Free U.S Ground shipping
$1.03
$0.86
Normally In Stock
Optifuse FSC 2 Fuse Glass Fuses 2 Amps
Free U.S Ground shipping
$1.03
$0.86
Normally In Stock
Optifuse FSC 5 Fuse Glass Fuses 5 Amps
Free U.S Ground shipping
$1.03
$0.86
Normally In Stock
Mersen GGC2 Fuse Glass Fuses 2 Amp
Free U.S Ground shipping
$1.25
$1.04
Normally In Stock
Littelfuse BLN030 Fuse Class Midget 30 Amps
Free U.S Ground shipping
$10.08
$8.40
Normally In Stock
Mersen US15M1HEL Fuse Holder, Class gPV, 1500 Volts (DC), 32 Amp
Free U.S Ground shipping
$45.60
$38.00
Normally In Stock
Mersen C218709 Fuse Link, Class gG, 400 Volts, 1 Amp
Free U.S Ground shipping
$12.14
$10.12
Normally In Stock
Mersen MPDBC6667 Power Distribution Block, 1000 Volts
Free U.S Ground shipping
$8.58
$7.15
Normally In Stock
Optifuse FSC 10 Fuse Glass Fuses 10 Amps
Free U.S Ground shipping
$1.03
$0.86
Normally In Stock
Littelfuse FLSR.200ID Fuse Class RK5 0.2 Amps
Free U.S Ground shipping
$46.62
$38.85
Normally In Stock
Littelfuse JTD080ID Fuse Class J 80 Amps
Free U.S Ground shipping
$132.62
$110.52
Normally In Stock
Mersen MPDB67633 Power Distribution Block, 1000 Volts, 310 Amp
Free U.S Ground shipping
$175.55
$146.29
Normally In Stock
Mersen MPDB69143 Power Distribution Block, 1000 Volts, 620 Amp
Free U.S Ground shipping
$271.67
$226.39
Normally In Stock
Mersen 40608G Fuse Holder, Class G, 480 Volts, 60 Amp
Free U.S Ground shipping
$151.18
$125.98
Normally In Stock
Mersen RL350 Fuse - Class H, 250 Volts, 350 Amp
Free U.S Ground shipping
$112.70
$93.92
Normally In Stock
Mersen SMG6 Fuse - Supplemental, 350 Volts, 6 Amp
Free U.S Ground shipping
$1.84
$1.53
Normally In Stock
Littelfuse JTD01.5ID Fuse Class J 1.5 Amps
Free U.S Ground shipping
$38.14
$31.78
Normally In Stock
Littelfuse JTD040ID Fuse Class J 40 Amps
Free U.S Ground shipping
$61.84
$51.53
Normally In Stock
Littelfuse JLLS250 Fuse Class RK5 250 Amps
Free U.S Ground shipping
$253.56
$211.30
Normally In Stock
Littelfuse SLC060 Fuse Class G 60 Amps
Free U.S Ground shipping
$37.39
$31.16
Normally In Stock
Mersen AJT150 Fuse Class J 150 Amp
Free U.S Ground shipping
$339.77
$283.14
Normally In Stock
Mersen GGC4 Fuse Glass Fuses 4 Amp
Free U.S Ground shipping
$1.67
$1.39
Normally In Stock
Mersen GGC8 Fuse Glass Fuses 8 Amp
Free U.S Ground shipping
$1.67
$1.39
Normally In Stock
Mersen GGC1 Fuse Glass Fuses 1 Amp
Free U.S Ground shipping
$1.25
$1.04
Normally In Stock
Edison ECNR200 Fuse Class RK5 200 Amps
Free U.S Ground shipping
$117.61
$98.01
Normally In Stock
Mersen AJT70 Fuse Class J 70 Amp
Free U.S Ground shipping
$169.86
$141.55
Normally In Stock
Mersen SBS15 Fuse Ferrule Fuses 15 Amp
Free U.S Ground shipping
$18.98
$15.82
Normally In Stock
Mersen A6T60 Fuse Class T 60 Amp
Free U.S Ground shipping
$48.23
$40.19
Normally In Stock
Littelfuse 225003P Glass Fuse - 3 Amp, 250 VAC
Free U.S Ground shipping
$9.18
$7.65
Normally In Stock
Littelfuse 0362010.H Glass Fuse - 10 Amp, 32 VAC
Free U.S Ground shipping
$0.95
$0.79
Normally In Stock
Littelfuse 031303.2MXP 3AB/3AG (6.3x32mm) Fuse - 3.2 Amp, 250 VAC
Free U.S Ground shipping
$8.34
$6.95
Normally In Stock
Littelfuse MIN003 Automotive Fuse - 3 Amp, 32 VAC
Free U.S Ground shipping
$2.46
$2.05
Normally In Stock
Littelfuse H217001P Fuse - 1 Amp, 250 VAC
Free U.S Ground shipping
$5.14
$4.28
Normally In Stock
Littelfuse 22903.5P Glass Fuse - 3.5 Amp, 250 VAC
Free U.S Ground shipping
$14.20
$11.83
Normally In Stock
Littelfuse 235001P Glass Fuse - 1 Amp, 250 VAC
Free U.S Ground shipping
$8.16
$6.80
Normally In Stock
Mersen A6T70 Fuse Class T 70 Amp
Free U.S Ground shipping
$77.78
$64.82
Normally In Stock
Mersen A6T50 Fuse Class T 50 Amp
Free U.S Ground shipping
$54.60
$45.50
Normally In Stock
Mersen A3T125 Fuse Class T 125 Amp
Free U.S Ground shipping
$88.24
$73.53
Normally In Stock
Mersen ATMR15 Fuse Class CC 15 Amp
Free U.S Ground shipping
$31.69
$26.41
Normally In Stock
Mersen SBS4 Fuse Ferrule Fuses 4 Amp
Free U.S Ground shipping
$16.85
$14.04
Normally In Stock
Mersen ATDR10 Fuse Class CC 10 Amp
Free U.S Ground shipping
$39.58
$32.98
Normally In Stock
Mersen ATDR20 Fuse Class CC 20 Amp
Free U.S Ground shipping
$39.64
$33.03
Normally In Stock
Mersen ATDR30 Fuse Class CC 30 Amp
Free U.S Ground shipping
$39.58
$32.98
Normally In Stock
Mersen ATDR6 Fuse Class CC 6 Amp
Free U.S Ground shipping
$39.58
$32.98
Normally In Stock
Mersen A6T150 Fuse Class T 150 Amp
Free U.S Ground shipping
$107.68
$89.73
Normally In Stock
Mersen A6T100 Fuse Class T 100 Amp
Free U.S Ground shipping
$88.45
$73.71
Normally In Stock
Mersen A6T300 Fuse Class T 300 Amp
Free U.S Ground shipping
$290.00
$241.67

More Information about Fuses

Niche applications call for specialized fuses, such as power fuses and axial fuses. These target the solution that particular needs require, but selecting the proper current-limiting device is paramount when safe and reliable performance is demanded.

FAQs

What is system voltage drop?

System voltage drop refers to the reduction in voltage as electric current flows through the resistance or impedance of the electrical distribution system, leading to a lower voltage at the load end compared to the source.

Should voltage rating and interrupting rating be considered in fuse selection?

Yes, voltage rating and interrupting rating must be considered in fuse selection to ensure the fuse can safely handle the system's voltage and interrupt fault currents without causing damage or safety hazards.

Breakers vs Fuses

Fuses

Fuses are safety devices that are intended to provide protection to both equipment and people in the event of a power surge or an overcurrent situation. A fuse can provide this protection by using a small piece of wire that is sacrificial, and is intended to burn up when too much current is passed through it. When this happens, the fuse eliminates the flow of electricity in that circuit until it is replaced. The size and type of wire that is used in the fuse will dictate how much current can pass through that individual fuse. So the main thing to remember is, when a fuse blows, it must be replaced and cannot be reused. 

Circuit Breakers

Circuit breakers are intended to be reused after they are “tripped” during a power surge or an overcurrent situation. Much like fuses, circuit breakers are designed to trip at a certain current level. This is intended to protect both equipment and anyone in the area of that particular circuit. Circuit breakers can be found in just about any variation from single phase, low current applications to three phase, and high current applications.

As a general rule: fuses are more simplistic and reliable. They cost less initially and are better suited for individual circuit protection. However, they can create more cost over time with each use and may create hazards due to the exposed connection points. Whereas circuit breakers offer better branch circuit protection and do not need to be replaced after each use. They are more expensive initially and, because of their complexity, are more prone to failure over time.