Masterfuse Series - Configurable Fuse Solution

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Disclaimer Notice

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 Masterfuse® incorporates several high-current 32 V fuses into a compact circuit protection solution. Each can include a mix of automotive fuse types such as MIDI® and MEGA® fuses, and each can be customized to an automaker’s specifications for connectors and markings. Contact Littelfuse to create a Masterfuse optimized for each product line.


  • Can include fuses with ampere ratings of 30 A to 350 A for full wire protection
  • Can include fuses with ratings of 300 A to 600 A for short circuit protection
  • Accommodates fuses with tin-plated or silver-plated copper terminals
  • Fuses operate at up to 125 °C
  • PPA-GF33HS housing with UL flammability rating of HB
  • Customizable with plug connectors or M5, M6, M8, or M10 mounting holes
  • Complies with ISO 8820-5
  • RoHS compliant


  • Can be configured multiple ways with a mix of high-current fuse types
  • Increases reliability by reducing the number of terminal interfaces
  • Lowers production and assembly costs by reducing the need for fuse boxes, bolts, bus bars, and connectors, as well steps during installation


  • Passenger cars
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