The five primary blade fuse types for cars are Micro2, Micro3, LP-mini (Low-Profile Mini), Mini, and Regular (ATO/ATC). Each has distinct dimensions and current ratings to protect specific electrical circuits, ensuring vehicle safety and functionality.
Micro2 fuses are the smallest, measuring approximately 10.9 mm long, 3.8 mm wide, and 8.8 mm tall. They handle currents from 5 to 30 amps and are commonly used in compact electronics like sensors or keyless entry systems. Industry data indicates their adoption has grown in vehicles from the 2010s onward due to space-saving designs.
Micro3 fuses feature a three-blade design, with dimensions around 14.5 mm x 4.2 mm x 18.1 mm. Their current ratings range from 5 to 15 amps, often protecting circuits for infotainment or advanced driver-assistance systems. Market records show they are prevalent in European and Asian models.
LP-mini fuses, also known as APS or Low-Profile Mini, have a thinner profile at about 10.9 mm x 3.6 mm x 16.3 mm. They support currents from 2 to 30 amps and are ideal for dashboard panels or areas with height restrictions. Automotive standards highlight their use in modern interiors.
Mini fuses (APM or ATM) are a widespread standard, with similar dimensions to LP-mini but a taller height. They cover 2 to 30 amps and are found in general circuits like lighting or power windows. According to industry reports, Mini fuses dominate in vehicles manufactured after the 1990s.
Regular fuses, including ATO, ATC, and ATS types, were introduced by Littelfuse in 1976 for low-voltage automotive use. They measure 19.1 mm x 5.1 mm x 18.5 mm and handle 1 to 40 amps, typically for higher-power components like headlights or cooling fans. Their robustness makes them a staple in older and heavy-duty applications.
The table below compares key attributes:
| Fuse Type | Dimensions (L x W x H in mm) | Current Range (Amps) | Common Applications |
|---|
| Micro2 | 10.9 x 3.8 x 8.8 | 5 – 30 | Electronics, modules |
| Micro3 | 14.5 x 4.2 x 18.1 | 5 – 15 | Infotainment, lights |
| LP-mini | 10.9 x 3.6 x 16.3 | 2 – 30 | Dashboard, tight spaces |
| Mini | 10.9 x 3.6 x 16.3 | 2 – 30 | General circuits |
| Regular | 19.1 x 5.1 x 18.5 | 1 – 40 | Headlights, fans |
Selecting the correct fuse type is critical; mismatching can lead to electrical failures or fire risks. Always refer to the vehicle's manual or fuse box diagram for specifications. For replacement, use identical amp ratings and certified products to maintain system integrity. Understanding these types aids in troubleshooting and upgrades, especially with evolving automotive technology.
