Blade Fuses

Blade Fuses are a form factor of fuses used to protect the wiring and electrical equipment for vehicles.

Blade fuses come in six different physical dimensions:

Micro2 Blade Fuses
Micro3 Blade Fuses
LP-Mini (APS) Blade Fuses, also known as low-profile mini. Unofficially, the "low-profile mini" fuse is sometimes incorrectly called "Micro" since the term means smaller than mini, but recently fuses using the Micro name have been released (Micro2 and Micro3).
Mini (APM / ATM) Blade Fuses. The mini fuses were developed in the 1990s.
Regular (APR / ATC / ATO / ATS) Blade Fuses, also known as standard, were developed in 1976 as ATO by Littelfuse for low voltage use in motor vehicles. Bussmann makes the ATC that also complies with the same ISO 8820-3 and SAE J1284 standards. OptiFuse, a newer entrant in the market, makes regular (APR / ATC / ATO) fuses that meet the same standards.
Maxi (APX) Blade Fuses, heavy-duty.

Blade size	Blade group	Dimensions L × W × H	Common ratings (maximum current)
Micro2	APT, ATR	9.1 × 3.8 × 15.3 mm	5, 7.5, 10, 15, 20, 25, 30
Micro3	ATL	14.4 × 4.2 × 18.1 mm	5, 7.5, 10, 15
LP-Mini (low profile)	APS, ATT	10.9 × 3.81 × 8.73 mm	2, 3, 4, 5, 7.5, 10, 15, 20, 25, 30
Mini	APM, ATM	10.9 × 3.6 × 16.3 mm	2, 3, 4, 5, 7.5, 10, 15, 20, 25, 30
Regular	APR, ATC, ATO, ATS	19.1 × 5.1 × 18.5 mm	0.5, 1, 2, 3, 4, 5, 7.5, 10, 15, 20, 25, 30, 35, 40
Maxi	APX	29.2 × 8.5 × 34.3 mm	20, 25, 30, 35, 40, 50, 60, 70, 80, 100, 120

Color	Current rating	Micro2	Micro3	LP Mini	Mini	Reg	Maxi
Dark blue	0.5 A					✓
Black	1 A					✓
Grey	2 A			✓	✓	✓
Violet	3 A			✓	✓	✓
Pink	4 A			✓	✓	✓
Tan	5 A	✓	✓	✓	✓	✓
Brown	7.5 A	✓	✓	✓	✓	✓
Red	10 A	✓	✓	✓	✓	✓
Blue	15 A	✓	✓	✓	✓	✓	✓
Yellow	20 A	✓		✓	✓	✓	✓
Transparent	25 A	✓		✓	✓	✓	Grey
Green	30 A	✓		✓	✓	✓	✓
Blue-green	35 A			✓	✓	✓	Brown
Orange	40 A			✓	✓	✓	✓
Red	50 A						✓
Blue	60 A						✓
Amber/tan	70 A						✓
Transparent	80 A						✓
Violet	100 A						✓
Purple	120 A						✓