SKU: 44181811002

Blue Sea 300A Red Mini m-Series On/Off Battery Switch

Sale price$46.64 Regular price$51.82
Save 10%

Pay in installments of $12.96 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 5 - Aug 10

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Blue Sea 300A Red Mini m-Series On/Off Battery SwitchBlue Sea m Series: Compact High Current Battery Isolation Reliable Power Management for Marine and RV Systems The Blue Sea Systems m Series Battery Switch solves the common challenge of installing high amperage isolation in tight spaces. Despite its compact footprint, this switch is engineered to handle significant power loads, making it an ideal choice for switching a single battery to a single load group in boats, caravans, and 4WD setups. Unlike

Blue Sea m-Series: Compact High-Current Battery Isolation

Reliable Power Management for Marine and RV Systems

The Blue Sea Systems m-Series Battery Switch solves the common challenge of installing high-amperage isolation in tight spaces. Despite its compact footprint, this switch is engineered to handle significant power loads, making it an ideal choice for switching a single battery to a single load group in boats, caravans, and 4WD setups.

Unlike generic switches that often suffer from voltage drop or overheating under load, the m-Series features tinned copper studs for maximum conductivity and corrosion resistance. It is rated for 300A continuous current, with an impressive intermittent rating of 500A (5 minutes) and a cranking rating of 900A (30 seconds), ensuring it can handle engine starting surges without failure.

Ignition Protected for Safety

Safety is paramount in marine electrical design. This switch is ignition protected, meaning it is safe for installation on gasoline-powered boats. It prevents internal sparks from igniting fuel vapours, a critical risk reduction feature for engine rooms and fuel locker installations. The casing is also designed to IP66 standards (when properly mounted), protecting internal contacts from harsh marine environments.

Versatile Mounting and Installation

Installation flexibility is a standout feature of the m-Series. The case design allows for three mounting options: surface, front panel, or rear panel mounting, accommodating various console and bulkhead thicknesses. The isolating cover includes snap-on sections to protect rear contacts, ensuring compliance with ABYC requirements.

The switch features 3/8"-16 (Approx. M10) terminal studs which accept ring terminals comfortably. To accommodate heavy cabling, the design provides ample clearance for cables up to 4/0 AWG (Approx. 120mm²).

Future-Proof Voltage Handling

While commonly used in 12V battery systems, this switch is rated for a maximum of 48V DC. This makes it fully compatible with modern 24V and 48V lithium battery banks often found in advanced off-grid energy systems and electric propulsion setups.

Key Features

  • High Current Capacity: 300A continuous and 900A cranking rating in a compact "mini" size.
  • Ignition Protected: Safe for installation aboard petrol-powered vessels.
  • Wide Voltage Range: Suitable for 12V, 24V, and up to 48V DC systems.
  • Conductive Design: 3/8"-16 (Approx. M10) tinned copper studs for maximum conductivity and corrosion resistance.
  • Flexible Mounting: Surface, rear, or front panel mounting options with snap-out isolation covers.
  • Tactile Operation: Robust knob with positive click-stop positions for clear ON/OFF status.

Secure Your Electrical System

Ensure your vessel or vehicle is equipped with a master switch that meets professional safety standards. Install the Blue Sea m-Series Switch today for reliable circuit isolation and peace of mind on the water or the road.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 44181811002

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.3 ★★★★★
Based on 22 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
G
Verified Purchase
Gerry Cloyd
Phoenix, US
★★★★★ 5
Great Product
Pattern Name: Plastic Spoons
Thank you as order.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
A
Verified Purchase
Angelica
Dallas, US
★★★★★ 5
Empaques individuales
Pattern Name: Plastic Spoons
Estás cucharas son excelentes porque ya vienen en su empaque individual . La calidad es buena , hay otras que son más fuertes que esta pero aún así no está mal por el precio .
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 9, 2026
J
Verified Purchase
Jose Lopez
Whiting, US
★★★★★ 5
Great affordable product
Pattern Name: Plastic Spoons
These spoons are perfect for our acai shop! They are always high quality, and the price point is perfect. They aren't flimsy or cheap like others you find.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 24, 2025
J
Verified Purchase
J Mundell
Cuba, US
★★★★★ 4
Useful Yet Flimsy
Pattern Name: Plastic Spoons
Great for cereal, soups, easy to eat items. Too flimsy for hard ice cream or anything that needs a similar slice or scoop.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 15, 2022
M
Verified Purchase
Mayra A Torres
Louisville, US
★★★★★ 5
Cucharas con cubiertas
Pattern Name: Plastic Spoons
Son de muy buena calidad y precio
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 13, 2025

recommand products