Littelfuse Introduces the BMZF Series Battery Mount ZCASE® Fuse Holder to the Commercial Vehicle Product Line

CHICAGO, November 22, 2019 – Littelfuse, Inc., the global leader in circuit protection, introduced the BMZF Series Battery Mount ZCASE® Fuse Holder to the commercial vehicle product line. The BMZF Series Battery Mount Fuse Holder allows for high current fusing to be mounted directly to a post style battery terminal without additional mounting hardware and is specifically designed for the rigorous demands of commercial vehicle applications. The BMZF’s compact design saves space and eliminates the unprotected high current cables that would otherwise be required to feed a non-battery-mounted fuse holder or power distribution module.

The BMZF Series accepts Littelfuse proprietary M10 ZCASE fuses that are available in 80-600A ratings and that have characteristics similar to those of the MEGA fuse. At 70-300A, accessory circuits are protected from damage from prolonged high current conditions. From 300-600A, the ZCASE acts as a starter fuse, allowing high inrush currents associated with engine starting, but protecting from short circuiting. Geoff Schwartz, Business Development Manager, Commercial Vehicles, at Littelfuse, said “The BMZF was built to uphold to high current fusing as well as compact in design to reduce space.”

BMZF Series Battery Mount ZCASE® Fuse Holder Applications:

  • High current starter circuit protection
  • Pre-fuse short circuit protection
  • Battery box / engine compartment fusing
  • High current accessory circuit protection
  • Work Truck Body Modifications to OEM Chassis


The BMZF Series Battery Mount ZCASE® Fuse Holder is available in 1, 2, or 3 circuit configurations. The new BMZF Series Battery Mount ZCASE® Fuse Holder has A special insulated bolt used to mount the fuse to the busbar eliminates the need for the special nylon nut traditionally used to isolate power in similar legacy designs.

Sample requests may be placed through authorized Littelfuse distributors worldwide. For a listing of Littelfuse distributors, please visit

For more information

Additional information is available on the BMZF Series Battery Mount ZCASE® Fuse Holder. For technical questions, please contact our technical support team at

About Littelfuse

Founded in 1927, Littelfuse is the global leader in circuit protection with advancing platforms in power control and sensor technologies. The company serves customers in the electronics, automotive and industrial markets with products that include fuses, semiconductors, polymers, ceramics, relays and sensors. Littelfuse has more than 11,000 employees in more than 50 locations worldwide. For more information, please visit