Sea-Dog Contura Rocker Switch 420201-1, SPST On/Off, 20 Amp 12 Volt Marine Switch

The Sea-Dog Contura Rocker Switch (420201-1) is an SPST On/Off toggle switch built for marine electrical panels where reliable, corrosion-resistant switching is essential. It uses a single-pole, single-throw circuit with 2 blade terminals, giving a straightforward on/off control for lighting, pumps, fans, and other 12 volt accessory circuits rated up to 20 amps.

Construction is stamped brass and injection molded nylon, with silver tin oxide contacts inside the switch body for dependable, low-resistance switching over repeated cycles. The Contura Rocker Switch line is engineered to withstand the marine environment: it is vibration, shock, thermoshock, moisture, and salt spray resistant, with an operating temperature range from -40 degrees Celsius to 85 degrees Celsius. It carries UL1500 and ISO8846 ignition protection ratings for use on marine products, and an IP66 rating for the front panel components, meaning the visible rocker face resists dust and powerful water jets when properly panel-mounted.

The rocker measures 13/16 inch by 1-7/16 inch, a common panel cutout size, making it a straightforward drop-in for helm stations, dash panels, and accessory switch panels already using this footprint. This is the standard maintained On/Off version within the Contura Rocker Switch family.

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 420201-1
• Product Name: Contura Rocker Switch
• Circuit Type: SPST
• Action: On/Off
• Terminals: 2 Blades
• Current Rating: 20 Amps
• Voltage Rating: 12 Volts DC
• Dimension A: 13/16 inch
• Dimension B: 1-7/16 inch
• Weight: 0.074 pounds
• Material: Stamped Brass, Injection Molded Nylon
• Contact Material: Silver Tin Oxide
• Operating Temperature Range: -40 degrees Celsius to 85 degrees Celsius
• Ignition Protection: UL1500 / ISO8846
• Ingress Protection Rating: IP66 (front panel components only)
• Environmental Resistance: Vibration, shock, thermoshock, moisture, and salt spray resistant
• UPC: 035514420983

Frequently Asked Questions

What type of circuit does the Sea-Dog 420201-1 switch use? The 420201-1 is an SPST (single-pole, single-throw) switch with an On/Off action and 2 blade terminals, giving it a single circuit that is either fully on or fully off.

What amp and volt rating does this switch have? It is rated 20 amps at 12 volts DC, suitable for typical marine accessory circuits such as lighting, pumps, and fans on a 12 volt system.

Is the 420201-1 a momentary switch? No, the 420201-1 is a standard maintained On/Off switch, not momentary. Sea-Dog also makes a momentary SPST version, part number 420202-1, which is a separate part for applications needing spring-return operation.

What size is the switch cutout? The Contura Rocker Switch 420201-1 measures 13/16 inch by 1-7/16 inch, matching the common panel cutout size used across the Contura Rocker Switch line.

What material is the Sea-Dog Contura switch made of? It is constructed of stamped brass and injection molded nylon, with silver tin oxide contacts for reliable, low-resistance switching.

Can this switch handle exposure to salt water and moisture? Yes, the 420201-1 is vibration, shock, thermoshock, moisture, and salt spray resistant, and carries an IP66 rating for its front panel components.

Does the 420201-1 have ignition protection for marine use? Yes, it is UL1500 and ISO8846 ignition protection rated, meaning it is certified safe for installation on marine products near fuel systems.

What temperature range can this switch operate in? The Contura Rocker Switch 420201-1 operates from -40 degrees Celsius to 85 degrees Celsius, allowing use across a wide range of marine climates.

How much does the switch weigh? The Sea-Dog 420201-1 weighs 0.074 pounds.

What is included when I order the 420201-1? Each order is for a single Contura Rocker Switch, part number 420201-1, in the SPST On/Off configuration.

How is this different from the illuminated Contura switches? The 420201-1 is a standard non-illuminated SPST On/Off rocker, while Sea-Dog's illuminating Wave rocker switches use additional polycarbonate components and light up in the ON position; those are separate part numbers from the 420201-1.