- Operation Mode: ON-OFF-ON
- Current Rating: 1 Microamps
- Operating Voltage: 48 Volts
- Contact Type: Normally Open
- Connector Type: Idc
- Brand: Blue Sea Systems
- Switch Type: Temperature Switch
- Terminal: Spdt
- Material: Metal
- Item Dimensions LxWxH: 2.9 x 6.38 x 8.63 inches
- Single Circuit ON-OFF. Switches a single battery to a single load group
- Ignition protectedβsafe for installation aboard gasoline powered boats
- IP66 waterproof, ISO 8846 and meets ABYC requirements
- Terminal Stud Size: 3/8″ – 16
- Continuous rating: 350A, Maximum voltage: 48V DC






















Notre Emory –
The switch was a breeze to install, feels very solid, and I expect it to last a long time. I’m sure this is a little over-kill for my single marine battery, but I’m willing to pay an extra twenty bucks for peace of mind. This switch has a very high threshold for the load of amps that occur upon starting the engine, and it’s size and weight imply that I won’t be replacing it any time soon. The ability to flush-mount it worked great and keeps it looking professional.Regarding my specific setup: I have a standard marine battery running to a 120hp Yamaha outboard. For the last couple seasons I have had an issue with the battery dying if I didn’t use the boat for several weeks. Physically disconnecting the battery terminals after using the boat solved the problem, but it wasn’t the most user-friendly solution for the rest of the family. The issue suggests a larger trickle from the battery than there should be, but it’s not worth my time or money to figure out what device is pulling current even when the key is off. So the solution was to get a simple switch that does the same thing as physically disconnecting from the terminals. It’s worked great so far; no battery drain after leaving the boat for a month.Originally I intended to mount it below the dashboard, but I ended up taking more simple route and mounted it closer to the battery in one of the compartments under a back seat. I used a 3 5/8″ hole saw to cut through the plastic wall of the seat, about halfway up from the floor. Then I pushed the switch into the hole, marked the four locations of the bolts, drilled four small holes, and mounted the switch with four nuts and bolts.NOTE, I needed the following extra materials to install the switch:1. 3 5/8″ hole saw (not needed unless flush-mounting, and you could use a different tool too)2. Four bolts and nuts (at least 3.5″ in length, I forget the diameter)3. Wire and crimp-connectors to extend the wire from the battery to where I mounted the switch, remember that you only need to extend the positive (+) cable to the switch)
Jeff –
Used for electrical system installed in a sprinter van. Not yet installed but it looks like it should work fine.
Bob G –
I tried to get off easy going cheap with a knockoff version of a battery shut off switch. Well , that switch lasted all of 3 weeks and 4 turns and it failed. Power to troller whether it was on or off. I bypassed the switch and all was fine.i already had a blue seas switch for my main system so I went right back and grabbed this switch for the troller.its heavy duty ..made for flush mount or outside mount. The switch is heavy duty inside and out. Opened my hole through the carpeted wall ..fit this in ..used my own hardware and wired it in. Works perfectly.blue seas rocks 10 stars
Sharon Sealy –
Great switch that is the beginning and end of all my lake adventures. I have a dual battery setup on my pontoon boat. The start battery is isolated from my house battery so I don’t have to worry about playing music all day and not having juice to start up at the end of the day. Great product, easy instructions. Use good wire and connections and you will probably love it too.
Shane –
Installed on a camper. Customer wanted the ability to disconnect battery while itβs parked for long periods of time. Made a simple bracket for it. This will work for positive side, simpler to switch the ground. So far itβs working as intended.Packaging has a bit more information as to the amps it can take. See picture.
Chris H –
From the photos I was under the impression that this was a smaller size switch, but it is not. It is bigger than I thought, but very well made so I used it anyway.
snowboardmama –
I purchased this for the battery bank in my sailboat. It was super easy to install and it works great!
Bart –
I’ve bought several Blue Sea products now. They’re all about as high of quality as anyone can make them. Built to last!