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NAPA Auto Parts GRANDVIEW
844 Grandview Ave
Columbus,  OH  43215-1124
(614) 488-3176
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Mon-Fri:7:00 AM-6:00 PM
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Battery Isolator - H/D Truck

Battery Isolator - H/D Truck

Part #: TWD 48525BX
Line: Traction
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Features & Benefits

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The Littelfuse battery isolator is designed for heavy-duty trucks, ensuring reliable power management between the starting and auxiliary batteries. It prevents the auxiliary battery's load from draining the main battery, preserving power for engine startup. Engineered for durability, it provides efficient and automatic battery isolation for enhanced vehicle performance.


  • No efficiency losses due to diodes
  • Compatible with all types of alternators
  • LED status indicator for easy monitoring
  • Quiescent current: 5mA typical, 8mA maximum
  • Smaller and lighter than traditional isolators
  • More flexible than traditional battery isolators
  • Allows bi-directional charging from the alternator or shore power
  • Simple installation: connect to starting battery, auxiliary battery, and ground
  • Optional start assist with momentary switch for auxiliary battery to assist starting battery
  • Reduces load on the charging system, extending charger life by connecting auxiliary battery only when charged to 13.2V

Specifications

Manufacturer Little Fuse Commerical
Mounting Hardware Included No
VMRS Code 032001072

Safety Information

Vehicle Fitment Guide

Product Reviews