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The Blue Sea Systems m-Series Mini On-Off Battery Switch is a compact, marine-grade electrical switch designed for single-circuit battery control. Rated for continuous 300A and intermittent 500A at 48V DC, it features a make-before-break contact design for uninterrupted power transfer. With IP66 waterproofing and ignition protection meeting ISO 8846 and ABYC standards, it ensures safe, reliable operation aboard gasoline-powered boats. Its robust build and premium warranty make it the trusted choice for professionals demanding durability and performance.









| ASIN | B00558LSJE |
| Actuator Type | Push Button |
| Batteries Included | No |
| Brand | Blue Sea Systems |
| Circuit Type | 1-way |
| Colour | Black |
| Connectivity Protocol | Wi-Fi |
| Contact Material | Copper |
| Controller Type | Push Button |
| Country of Origin | USA |
| Current Rating | 500 Amps |
| Customer Reviews | 4.6 4.6 out of 5 stars (465) |
| Date First Available | 6 August 2012 |
| Global Trade Identification Number | 00190283665048, 00632085600624 |
| International Protection Rating | IP66 |
| Item Dimensions LxWxH | 17.8 x 10.2 x 7.6 Centimeters |
| Item Weight | 294 g |
| Item dimensions L x W x H | 17.8 x 10.2 x 7.6 Centimeters |
| Length | 6.63 Inches |
| Manufacturer | Blue Sea Systems |
| Material Type | Copper |
| Mounting Type | Wall Mount |
| Net Quantity | 1.0 Count |
| Number of Items | 1 |
| Number of Pieces | 1 |
| Operation Mode | ON-OFF |
| Size | lockable = none | amps - max = none | afd = none | |
| Style | On-off W/Knob |
| Terminal | marine |
| Usage | personal |
| Wattage | 14400 Watts |
| Weight | 0.7 Pounds |
| Width | 3.88 Inches |
S**A
Blue Sea Systems makes probably the best switch out there. UL and CE ratings confirm its quality. Lots of similar looking non-rated copy cats on the market, but they cut corners for cost and are not rated switches. If you want a quality switch you can trust, this is a great option.
Z**R
Amazing product love blue sea system products
J**I
Great support and instructions available, built very well and exceeds my expectation of quality. Easy to wire and mount, just wish it came with mounting hardware like screws or nuts and bolts. Best value for my money with such high standards of quality in a switch that is used very frequently. Really makes my battery life last with the ability to use as a disconnect switch.
A**R
Does the job. Solid connections.
T**T
I installed this diconnect in my dad's pontoon boat to disconnect the battery and stop parasitic draw on the battery when the boat sits. It worked like a charm. It is very durable with a heavy detent and a audible heavy click into place. The installation was straight forward. It looks nice and is smaller than competing product. It seems to be holding up well and is handling the outdoor weather well. The price is competitive on this one. You get a true marine grade disconnect at a good price.
Trustpilot
1 week ago
1 week ago