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Hubbell M21SP Marine Toggle Switch DPST On/Off 12V DC

Manufacturer

Hubbell

<h3>Engineering Excellence Since 1888</h3> <p>Founded in 1888 by inventor Harvey Hubbell II, Hubbell Incorporated began with groundbreaking inventions that transformed electrical connectivity, including the U.S. electrical plug and the pull-chain light socket. What started as a small manufacturing facility in Bridgeport, Connecticut has evolved into a global leader in utility and electrical solutions. Between 1896 and 1909, Harvey Hubbell was granted 45 patents on a wide variety of electrical products, establishing a legacy of innovation that continues to define the brand today.</p> <p>Today Hubbell continues its legacy of innovation as a leading manufacturer of utility and electrical solutions which enable customers to operate critical infrastructure safely, reliably, and efficiently. The company's commitment to engineering excellence has made it a trusted name across commercial, industrial, utility, and marine applications. From data centers and hospitals to marinas and recreational vessels, Hubbell products deliver the dependable performance that critical systems demand.</p> <h3>Marine Power Solutions Built for Harsh Environments</h3> <p>Hubbell has earned particular recognition for its marine electrical products, which are engineered to withstand the unique challenges of saltwater environments. The company's products are built to provide safe, dependable, and lasting power in harsh marine environments, with fully functional shore power that minimizes downtime. Marine professionals rely on Hubbell's reputation for quality when selecting components that must perform reliably in corrosive conditions where failure is not an option.</p> <p>The <a href="/7390-hubbell-hubbell-shore-power-adaptors-200549">Shore Power Adaptors</a> line exemplifies this commitment to marine excellence, offering boaters and marinas the secure connections they need for safe power transfer. For vessels requiring higher amperage capacity, Hubbell's <a href="/7390-hubbell-hubbell-100a-products-200543">100A Products</a> deliver heavy-duty performance in compact, corrosion-resistant housings. Harvey Hubbell III devised the company's lines of Twist-Lock industrial connectors with new 2-, 3-, and 4-wire devices of various ratings, and this innovation continues in today's marine-grade locking devices that prevent accidental disconnection in demanding conditions.</p> <h3>Comprehensive Amperage Solutions</h3> <p>Understanding that different vessels and applications require specific power configurations, Hubbell offers complete product lines across multiple amperage ratings. The <a href="/7390-hubbell-hubbell-50a-products-200546">50A Products</a> category serves as the workhorse for many recreational and light commercial marine applications, balancing capacity with practical installation requirements. For lighter-duty applications, <a href="/7390-hubbell-hubbell-30a-products-200545">30A Products</a> provide reliable connectivity in a compact form factor ideal for smaller vessels and auxiliary circuits.</p> <p>Beyond marine applications, Hubbell's expertise extends throughout the electrical industry. The company's <a href="/7390-hubbell-electrical-parts-accessories-200355">Electrical Parts & Accessories</a> showcase the breadth of engineering knowledge accumulated over more than a century of manufacturing excellence. Each product reflects the same attention to material selection, environmental resilience, and safety standards that have made Hubbell a preferred specification among electricians, contractors, and engineers worldwide.</p> <h3>Innovation That Powers Progress</h3> <p>Hubbell Incorporated has grown to be an international manufacturer of electrical and electronic products for a broad range of non-residential and residential construction, industrial, and utility applications. The company maintains manufacturing facilities across multiple continents and continues to invest in research and development that addresses evolving industry needs. From smart grid technologies to renewable energy infrastructure, Hubbell's product portfolio adapts to support the transition toward more efficient and sustainable power systems.</p> <p>Whether you're outfitting a new marina, upgrading shore power infrastructure, or maintaining critical electrical systems aboard commercial vessels, Hubbell's comprehensive range of marine and electrical products provides the quality and reliability that professionals demand. The company's dedication to manufacturing products that meet or exceed industry standards ensures that every connection, every adapter, and every component contributes to safer, more dependable electrical systems.</p>

Part Number

M21SP
05/31/2036 8:37 PM
Sale Price

$16.73

In Stock (8)

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Usually delivered within 2 days

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Product Details

The Hubbell M21SP is a marine-grade double pole single throw (DPST) toggle switch designed for reliable on/off control in 12-volt DC electrical systems. Built to withstand the harsh marine environment, this switch is ideal for controlling lights, accessories, and other electrical equipment on boats and marine vessels.

Key Features:

  • Double pole single throw (DPST) configuration for positive on/off switching
  • 12V DC rated for marine electrical systems
  • Black finish for corrosion resistance and durability
  • Spade terminal connections for secure wiring
  • Panel mount design with 1/2-inch mounting hole required
  • Fits panels up to 1/4-inch thick without backup nut, or up to 3/16-inch thick with backup nut included
  • Four connection terminals for DPST wiring

This marine-grade toggle switch is manufactured by Hubbell Wiring Device-Kellems to deliver long-lasting performance in demanding marine applications. Suitable for controlling lighting circuits, accessory power, and other 12-volt DC loads aboard recreational and commercial vessels.

Products specifications

Package

Retail

Positions

On/Off

Type

DPST

Great customer service. Fast shipping. The products provided are good quality.

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Best price ever, easy to order

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best price by far

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Item just as descibed, great price and fast shipping. This has been my first order and actually first time searching for an auto part on this site and all went as expected. Glad I saw reference to it a car forum.

So far, a great shopping experience.

Autoplicity was a pleasure to deal with. Website is easy to navigate and checkout was a breeze.

Ordered a cover for my Jeep. Price was extemely fair and shipped the next morning. Plus I like the variety of products that they have.

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