ADLER EF3 EV Fuse 150–300 A for 200-V DC Systems

The ADLER EF3 is a compact, screw-in high-current DC fuse. It was developed to protect high-performance battery, charging, and battery management systems in electric and hybrid vehicles.

The fuse is available in 150, 200, 250, and 300 A variants. All versions listed here are rated for a nominal voltage of 200 V DC.

Advantages of the ADLER EF3 EV fuse

• High DC fault current protection: Breaking capacity of up to 50 kA at 200 V DC.
• Suitable current ratings: Available in 150, 200, 250, or 300 A.
• Compact dimensions: All four variants have the same design.
• For cyclic loads: Designed to meet the requirements of electric vehicle and battery systems.
• Screw-type connection: The fuse is mounted using M8 screw connections.
• Traceability: According to the manufacturer, each fuse is marked with a QR code.

Available fuse ratings

The product page lists the following rated currents:

• 150 A
• 200 A
• 250 A
• 300 A

Dimensions

The 150, 200, 250, and 300 A models have the same main dimensions:

Open the ADLER EF3 manufacturer’s data sheet

Suitable Applications

The ADLER EF3 was developed to protect high-performance battery, charging, and management systems in electric and hybrid vehicles. It is suitable for DC power paths where high operating currents and potentially high short-circuit currents may occur.

Use in other mobile or stationary battery systems requires that the rated voltage, operating current, potential short-circuit current, time-current characteristic, and thermal conditions be properly verified.

Selection and Installation

The appropriate fuse rating is not selected based solely on the normal operating current. The wire cross-section, load peaks, potential short-circuit current, ambient temperature, and the time-current characteristic must also be taken into account.

The EF3 is mounted using M8 screw connections. The manufacturer recommends a tightening torque of 12 ± 1 Nm. Refer to the current data sheet for complete installation and operating conditions.

Conclusion

The ADLER EF3 offers a compact solution for protecting high-power 200-V DC systems. With ratings of 150, 200, 250, or 300 A, the rated current can be selected to suit the specific battery, charging, or drive application.

Frequently Asked Questions About the ADLER EF3 EV Fuse

• What fuse ratings are available?

  
  

  The product page lists variants with 150, 200, 250, and 300 A.

• What are the dimensions of the fuse?

  
  

  The variants are 77 ± 1 mm long, 25 ± 1 mm high, and 20 ± 0.5 mm wide. Additional detailed dimensions are provided in the dimensional drawing in the manufacturer’s data sheet.

• Is a fuse holder included?

  
  

  The EF3 is the fuse insert. Whether a holder or additional connection hardware is included depends on the specific offer and scope of delivery.

• How do you determine the correct fuse rating?

  
  

  The determining factors are operating current, wire gauge, DC voltage, load peaks, potential short-circuit current, and the time-current characteristic curve. The design should be performed by a qualified professional.