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Car Fuse Amperage Guide

Find the right fuse size for your circuit, identify fuse colors, and understand automotive fuse ratings.

Enter your device's power consumption to find the correct fuse amperage.

Calculated Draw
Recommended Fuse
Exact Draw
With Safety Margin
Wire Max (if selected)
Fuse Type

ATC/APR Blade Fuse Color Chart

1A
Black/Clear
2A
Gray
3A
Violet
4A
Pink
5A
Tan/Beige
7.5A
Brown
10A
Red
15A
Blue
20A
Yellow
25A
White/Nat
30A
Green
40A
Orange

Fuse Types Reference

TypeSizeMax ACommon Use
Mini (APM)Small blade30AModern cars — tight spaces
Regular (ATO/ATC)Standard blade40AMost common; universal
Maxi (APX)Large blade80AHigh-current: battery, alt
Micro2Extra small30ALate-model European cars
Micro33-terminal15ALate-model Asian/domestic
Glass (AGC)Cylinder30AVintage/classic vehicles
Bolt-onVaries300A+Main battery fuse