ZCASE® BMZB Series - 32V Battery-Mounted Fuse Holder with Busbar

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Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The Battery Mount ZCASE® Fuse Holder with Busbar (BMZB) series allows you to mount fusing directly to a post-style battery terminal. This series offers a compact solution with an integrated busbar, which consolidates complex wiring around a battery system, eliminating or reducing the need for additional wiring.

By creating additional fusing locations outside of the main fuse box, these products help reduce cabling and assembly time and provide localized circuit protection without modifying the existing battery harness.

This product is designed to mate with M6 ZCASE® fuses, and is rated to operate with fuse ratings up to 400A. This series mounts directly to the battery post with all necessary hardware coming pre-assembled. Available in 2-, 3-, and 4-position configurations, this series serves as a scalable circuit protection solution.

Features and Benefits

  • Specifically designed to relocate circuit protection closer to a vehicle battery
  • Integrated busbar
  • Plastic cover and overmolded housing
  • Battery clamp oriented to provide clearance for wire routing


  • Battery-Mounted Circuit Protection
  • Secondary Circuit Protection for Applications and Motors Such as Trucks and Snow Plows
  • Best Used for Hydraulics, Electric Pumps, or Other Secondary Motors

Access specifications, certifications, check availability and order parts below

Catalog #Mounting MethodFuse TypeCurrent Rating (Continuous) in AmpsVoltage Rating MaxTemperature Maximum CelsiusTemperature Minimum CelsiusRecommended TorqueAgency Approval - ShockAgency Approval - VibrationInput TerminalsOutput TerminalsSamplesCompare
FHZ210ClampZCASE4003285-405.4Nm ± 0.9Nm at 540rpmISO 16750-1, 3ISO 16750-1, 3Negative Battery PostM8Order
FHZ310ClampZCASE6003285-405.4Nm ± 0.9Nm at 540rpmISO 16750-1, 3ISO 16750-1, 3Positive Battery PostM8Order
FHZ410Bolt-DownZCASE4003285-4014Nm ± 2NmISO 16750-1, 3ISO 16750-1, 3Battery PostM8Order
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