Sea-Dog Momentary Push Button Switch with Cap 420427-1, SPST On-Off, 30 Amp, Boss-2 Terminal

The Sea-Dog 420427-1 is a momentary push button on/off switch built for behind-dash panel mounting in confined spaces. It is an SPST momentary switch rated 30 amps at 12VDC, with an overall length of 2-7/8 inches and a mounting stem measuring 1-7/16 inches with a 5/8 inch-32 thread, allowing it to fit through panels up to 1-1/8 inch thick.

Construction is a corrosion resistant, glass reinforced polyester (polypropylene) housing paired with an elastomeric rubber internal gasket and ultrasonic welded seams for increased water resistance in a marine environment. Two boss copper alloy screw terminal contacts (Boss-2 terminal type) provide the electrical connection, and the switch includes both a cap and a rubber boot nut in the box, so no separate cap purchase is needed.

This switch is designed for helm, dash, and accessory panels where a compact momentary on/off control is needed for lighting, horns, bilge pumps, or other 12VDC accessory circuits, in installations where panel space and depth are limited.

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 420427-1
• Product Style: Momentary Push Button Switch with Cap
• Material: Polypropylene (glass reinforced polyester housing)
• Circuit Type: SPST
• Action: Momentary On-Off
• Amperage: 30 Amps
• Voltage: 12 VDC
• Panel Shaft: 5/8 inch
• Shaft Length: 1-1/8 inch
• Overall Length: 2-7/8 inch
• Mounting Stem: 1-7/16 inch x 5/8 inch-32 thread
• Maximum Panel Thickness: 1-1/8 inch
• Terminal Type: Boss-2
• Terminal Contacts: 2 boss copper alloy screw terminals
• Cap Included: Yes
• Gasket: Elastomeric rubber internal gasket
• Sealing: Ultrasonic welded for increased water resistance
• Included Components: Rubber boot nut
• Weight: 0.088 pounds
• UPC: 035514423755

Frequently Asked Questions

What is the Sea-Dog 420427-1 push button switch used for? It is a momentary on/off push button switch intended for mounting in a behind-dash or helm panel to control 12VDC accessory circuits such as lighting, horns, or pumps in a compact space.

Is this switch momentary or does it stay on? The 420427-1 is a momentary SPST On-Off switch, meaning it only activates the circuit while the button is pressed.

What amperage and voltage is the switch rated for? The Sea-Dog 420427-1 is rated 30 amps at 12VDC.

What material is the switch housing made from? The housing is a corrosion resistant, glass reinforced polyester (polypropylene) construction, chosen for durability in a marine environment.

Does the 420427-1 include a cap? Yes, a cap is included with the Sea-Dog 420427-1, along with a rubber boot nut for installation.

What size hole or panel cutout does this switch need? The mounting stem measures 1-7/16 inches with a 5/8 inch-32 thread, and the switch fits panels up to 1-1/8 inch thick.

How long is the switch overall? The Sea-Dog 420427-1 has an overall length of 2-7/8 inches, with a panel shaft length of 1-1/8 inch.

What type of terminals does this switch use? It uses a Boss-2 terminal type with two boss copper alloy screw terminal contacts for wiring connections.

Is this switch water resistant? Yes, the 420427-1 uses an elastomeric rubber internal gasket and ultrasonically welded seams to increase resistance to water intrusion.

How much does the Sea-Dog 420427-1 weigh? The switch weighs 0.088 pounds.

Where is this switch typically installed on a boat? Its compact behind-dash panel dimensions make the Sea-Dog 420427-1 suitable for helm, dash, or accessory panels where mounting space is limited.

What brand makes the 420427-1 switch? This momentary push button switch is manufactured by Sea-Dog, part number 420427-1.