Item #864226

Cole Hersee Selector/Master Disconnect Battery Switch - M-750-BP

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Image of : Cole Hersee Selector/Master Disconnect Battery Switch - M-750-BP Cole Hersee Selector/Master Disconnect Battery Switch - M-750-BP Item # 864226


Cole Hersee's Selector / Master Disconnect Battery Switch combines functions of Battery Selector and Master Disconnect Switch for (4) battery power option.

Make-before-break design permits operation through the (3) ON positions with engine running. Engine should always be shut down before turning to OFF.


  • (4) Battery power options:
    • Power ON, battery 1
    • Power ON, battery 2
    • Power ON, both batteries
    • Power cut off at source
  • Make-before-break contact design allows switching between battery banks without power interruption
  • Use with either alternators or generators
  • Vapor proof, weather-, dust- and corrosion-resistant
  • Durable fracture-resistant high temperature plastic case, knob and insulator
  • Heavy duty copper stud terminals, with brass hex nuts
  • Can be surface mounted, or installed through a 3-5/16" dia. hole in panel


  • Switch type: Selector 4 Position
  • Continuous rating: 310 Amps
  • Intermittent rating (5 min.): 500 Amps
  • Max. voltage: 36V DC
  • Dimensions: 6" dia. (flange) x 2-5/8" H (overall)
  • Regulatory:
    • CE marked, Marine UL listed 707B, conforms to USCG section 183.410 for ignition protection

M-750 Battery Selector/Master Disconnect Switch Product Data Sheet

Part Numbers for Cole Hersee Selector/Master Disconnect Battery Switch - M-750-BP

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Hi. I have one of these in a 1969 VW bus that I purchased at auction. Can you please tell me what the purpose of this device is? I’m sure they are all related, but There are 2 batteries, an inverter, and a 120v port for backup power.

Asked by: Mike
Hello, this is a battery combiner for use on installations with two batteries
Answered by: RJT Outlet
Date published: 2024-04-15
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