Car Fuses | Glass, Micro & Maxi Blade Fuses, Micro2 Blade Fuse for Automotive

Car fuses are core safety components of automotive electrical systems, designed to cut off the circuit instantly when overcurrent or short circuit occurs, protecting vehicle electronic components, wires and batteries from damage. There are four mainstream types widely used in the auto industry: glass fuses, micro blade fuses, maxi blade fuses and Micro2 blade fuses, each with unique size, current rating and application scenarios, suitable for classic cars, modern passenger vehicles, trucks and modified cars.

1. Glass Tube Fuses

      。Specifications : Common sizes 6.35×30mm, 10×38mm, rated voltage 32V DC, current range 4A-80A

• Features : Low cost, easy to inspect, poor shock resistance, large size
• Applications : Basic circuits of classic cars, old trucks and motorcycles, such as headlights, ignition systems
  

  2. Maxi Blade Fuses 

  Maxi blade fuses (APX) are the largest blade fuses for automobiles, specially designed for high-power and heavy-duty vehicle circuits, with strong load capacity and high temperature resistance, mostly installed in the engine compartment fuse box.
  • Specifications : Size 19.1×18.8×5.1mm, current range 30A-120A
  • Features : High current rating, sturdy structure, suitable for harsh engine bay environment
  • Applications : Main battery circuits, air conditioners, inverters, power steering of trucks, RVs and modified vehicles

  3. Micro Blade Fuses & Micro2 Blade Fuses

  Micro blade fuses are ultra-small fuses for modern compact vehicles, and Micro2 blade fuses (ATR) are the most widely used 2-pin micro fuses in new models, solving the problem of limited space in modern car fuse boxes.

  Micro2 Blade Fuses  

  • Specifications : Size 9.1×15.3×3.8mm, current range 5A-30A
  • Features : Mini size, anti-vibration, stable performance, suitable for high-density circuit layout
  • Applications : Modern cars, SUVs, EVs, ECU, sensors, dashboard, audio systems

  Universal Color-Amperage Chart

  Automotive fuses adopt international standard color coding, which can quickly identify the current without tools, convenient for quick replacement:
  • 2A: Gray
  • 3A: Purple
  • 5A: Orange
  • 7.5A: Brown
  • 10A: Red
  • 15A: Blue
  • 20A: Yellow
  • 25A: Clear
  • 30A: Green
  • 40A & Above: Amber

  Selection & Replacement Tips

  1. Match the vehicle type: Classic cars choose glass fuses, modern cars choose Micro2 blade fuses, heavy-duty vehicles choose maxi blade fuses
  2. Strictly match the current: Never replace with a higher or lower current fuse to avoid component damage
  3. Choose high-quality products: High-quality fuses have stable melting performance and stronger safety protection

  Conclusion

  Glass, micro blade, maxi blade and Micro2 blade fuses are indispensable in automotive circuit protection, covering the needs of different vehicle types and circuit loads. Choosing the right type and rated current of car fuses is the key to ensuring the safe operation of vehicle electrical systems.