m-Series Mini Selector Battery Switch with Removable Knob
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BLUE SEA SYSTEMSm-Series Mini Selector Battery Switch with Removable Knob


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Model # 8646291 | Mfg # 6007UPC # 632085060077


m-Series Mini Selector Battery Switch with Removable Knob

Name Value
Amperage 300 Amps
Cold Cranking Amps 1500 Amps
Color Red
Dimensions 2 7/8" Length x 2 7/8" Width x 3" Height
ISO Approved UL Listed. Meets UL 1500
SAE J1171
Type On/Off Switches
Voltage 48 Volts DC
Warranty Details Five Years

Product Overview

A compact battery switch that offers multiple installation options. Switches isolated battery banks to all loads or combines battery banks to all loads.

Blue Sea Systems m-Series battery switches are ideal for outboard and small inboard boats. M-Series switches are ignition-protected and safe for use in engine rooms of gasoline-powered boats. Because they are waterproof, offer three mounting options and are just 2-7/8" square.

m-Series switches will fit almost anywhere. One piece tin plated copper terminal studs are 7/8" long and will handle multiple cables and the high torque loads required to maximize contact and minimize resistance. The case design allows cables to be run from every direction through knock-out panels in each side. Tactile textures on the face let you know the knob position by feel. The knob is removable to add another level of security and provide a service lock-out for safety.

Key Features

  • Provides an emergency combine feature to draw power from both batteries for starting or radio calls
  • Compact design makes installation in tight places easy
  • Three mounting options; can be installed on the surface, flush or the rear of the panel
  • Make before break feature allows switching between battery banks without interrupting power
  • Ignition protected and can be mounted in the engine room of gasoline powered boats
  • Removable knob for added security and provides service lock-out for safety
  • Corrosion resistant one piece tin plated copper studs are 7/8” long and accept multiple cables and accept high torque loads
  • Tactile textures on face let operate the switch in low or no light
  • Snap-out isolator covers and labels included
  • Lifetime warranty


  • Switch Positions: 4
  • Battery Combine: Yes
  • Alternator Field Disconnect: No
  • Maximum Voltage: 32V
  • Continuous Rating: 300A
  • Intermittent Rating (duration): 500A (5min)
  • Cranking Rating (30Sec): 900A
  • Battery Inputs: 2
  • Cable Size to meet ratings: 4/0 AWG
  • Mounting Holes: ¼”
  • Terminal Stud size: 3/8”
  • Dimensions: 2 7/8”L x 2 7/8”W x 3 1/8” D (overall)


Dimensional Drawing

 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.


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