Sea-Dog Contura Illuminated Rocker Switch 420212-1, SPST Momentary On/Off, 20A 12V

The Sea-Dog 420212-1 is an illuminated Contura-style rocker switch built for marine electrical panels where a momentary control is needed for horns, bilge pumps, spotlights, or other accessories that should only run while the switch is held. It is wired SPST (single pole, single throw) in a momentary On/Off configuration with 3 blade terminals, rated 20 amps at 12 volts DC. A red LED lights up the rocker face whenever the switch is pressed into the ON position, making it easy to confirm at a glance that the circuit is active.

Construction is stamped brass, injection molded nylon, and polycarbonate, with silver tin oxide contacts for reliable, low-resistance switching over time. The switch is built to resist vibration, shock, thermoshock, moisture, and salt spray, with an operating temperature range of -40 C to 85 C, making it suitable for exposed helm and dash installations aboard boats. It carries an IP66 ingress protection rating for the front panel components and meets UL1500 / ISO8846 ignition protection standards for marine products, so it is safe to install near fuel systems and other ignition-protected equipment. The switch body measures 13/16 inch by 1-7/16 inches, fitting standard rocker switch panel cutouts.

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 420212-1
• Circuit Type: SPST
• Switch Action: Momentary On/Off
• Terminals: 3 Blades
• Amperage Rating: 20 Amps at 12 Volts DC
• Dimension A (Width): 13/16 inch
• Dimension B (Length): 1-7/16 inches
• Weight: 0.078 pounds
• Material: Stamped Brass/Injection Molded Nylon/Polycarbonate
• Contact Material: Silver Tin Oxide
• Illumination: Red LED indicator, lit when in ON position
• Ingress Protection Rating: IP66 (front panel components only)
• Operating Temperature Range: -40 C to 85 C
• Ignition Protection: UL1500 / ISO8846 certified for marine use
• Standard Pack: 10 each

Frequently Asked Questions

What type of switch is the Sea-Dog 420212-1? The Sea-Dog 420212-1 is an illuminated Contura-style rocker switch wired SPST (single pole, single throw) in a momentary On/Off configuration, meaning the circuit is only active while the rocker is pressed.

What amperage and voltage is the 420212-1 rated for? This switch is rated 20 amps at 12 volts DC, using 3 blade terminals for the connections.

Does the switch light up? Yes, the 420212-1 displays a red light when the rocker is pressed into the ON position, so you can see at a glance that the circuit is active.

What is the switch body made of? It is constructed of stamped brass, injection molded nylon, and polycarbonate, with silver tin oxide contacts inside for reliable switching.

What are the dimensions of the 420212-1 switch? The switch measures 13/16 inch by 1-7/16 inches, sized to fit a standard rocker switch panel cutout.

How much does the 420212-1 weigh? The Sea-Dog 420212-1 weighs 0.078 pounds.

Is this switch rated for marine use? Yes, the 420212-1 is UL1500 / ISO8846 ignition protected for marine products and carries an IP66 rating for its front panel components, and it resists vibration, shock, thermoshock, moisture, and salt spray.

What operating temperature range can the switch handle? The 420212-1 operates from -40 C to 85 C, suitable for exposed helm and dash locations on a boat.

How is the 420212-1 different from the 420211-1 switch? The 420212-1 is a momentary SPST On/Off switch, while the 420211-1 is a standard (non-momentary) SPST On/Off switch in the same Contura style; both share the same 20A/12V rating, 3 blade terminals, and body dimensions.

Is the 420212-1 momentary or does it stay in position? It is momentary, so the circuit engages only while the rocker is held in the ON position and disengages once released.

How many terminals does the 420212-1 have? The Sea-Dog 420212-1 has 3 blade terminals.