Blue Sea Systems 4181 15A Backlit Push Button Switch - OFF-(ON) Momentary, Blue/Red LED

The Blue Sea Systems 4181 is a 15A, 12V DC backlit push button switch built for marine electrical panels where quick, waterproof, momentary switching is needed. It operates in an OFF-(ON) configuration, meaning the circuit is closed only while the button is held or actively engaged and returns to OFF on release, making it well suited to accessory circuits, lighting, anchor lights, running lights, and bilge pump controls. The button face is backlit and changes color to show circuit status at a glance: it glows blue when the switch is off and red when it is on, so operators can read the panel state even in low light without guessing.

Construction is IP67 waterproof, using an O-ring panel gasket and a molded rear cover to seal out spray and moisture, and the switch is reverse polarity protected to guard against wiring mistakes during installation. Termination is via a 3 inch bare wire pigtail sized for 8-16 AWG wire, allowing direct connection into a panel wiring harness without additional connectors. The switch mounts through a 7/8 inch (22.35mm) panel hole and accepts panel thicknesses from.04 inch to.24 inch (1-6mm). It ships with five icon labels (accessory, lights, anchor light, running light, and bilge pump) so the panel can be labeled for its intended circuit; an additional 50-icon label kit is available separately for other applications. The switch is rated for 10,000 switching cycles and an operating temperature range of -20C to 55C (-4F to 131F).

Specifications

• Brand: Blue Sea Systems
• Manufacturer Part Number: 4181
• Switch Type: Push Button
• Operation Mode: OFF-(ON) Momentary
• Current Rating: 15 Amps
• Operating Voltage: 12 Volts DC
• Backlight Color: Blue when off, Red when on
• Max. LED Operating Current: 20 mA
• Switching Cycles: 10,000
• Operating Temperature Range: -20C to 55C (-4F to 131F)
• Ingress Protection: IP67 waterproof with O-ring panel gasket and molded rear cover
• Polarity Protection: Reverse polarity protected
• Termination: 3 inch bare wire pigtails
• Wire Size: 8-16 AWG
• Panel Thickness:.04 inch to.24 inch (1-6mm)
• Mounting Hole Diameter: 7/8 inch (22.35mm)
• Product Dimensions (L x W x H): 8.94 x 2.81 x 1.65 inches
• Material: Plastic
• Color: Black
• Included Components: 15A push button switch, set of 5 icon labels
• Weight: 0.35 pounds
• UPC: 632085041816

Frequently Asked Questions

What does OFF-(ON) mean on the Blue Sea Systems 4181 switch? OFF-(ON) is a momentary switching mode: the Blue Sea Systems 4181 closes the circuit only while the button is actively pressed or engaged, then springs back to OFF on release, rather than staying latched on.

What is the current rating of the 4181 switch? It is rated for 15 amps at 12 volts DC, making the Blue Sea Systems 4181 suitable for accessory, lighting, anchor light, running light, and bilge pump circuits within that load.

Is the 4181 push button switch waterproof? Yes, the 4181 carries an IP67 waterproof rating, sealed with an O-ring panel gasket and a molded rear cover to keep out spray and moisture.

What color does the backlit button show? The button on the Blue Sea Systems 4181 glows blue when the switch is off and changes to red when the switch is on, giving a quick visual status check on the panel.

What size mounting hole does the 4181 require? A 7/8 inch (22.35mm) diameter mounting hole is needed to install the 4181, and it fits panel thicknesses from.04 inch to.24 inch (1-6mm).

How is the 4181 wired into a panel? It terminates in 3 inch bare wire pigtails sized for 8-16 AWG wire, so it can be spliced directly into the panel wiring harness without separate connectors.

Is the 4181 protected against reverse polarity? Yes, reverse polarity protection is built into the Blue Sea Systems 4181, guarding the switch against incorrect wiring during installation.

What labels come with the switch? The 4181 ships with five icon labels covering accessory, lights, anchor light, running light, and bilge pump functions; a 50-icon label kit is available separately for other circuit types.

How many switching cycles is the 4181 rated for? The Blue Sea Systems 4181 is rated for 10,000 switching cycles.

What operating temperature range does the 4181 tolerate? It is rated from -20C to 55C (-4F to 131F), covering typical marine operating conditions.

What material is the 4181 switch housing made of? The Blue Sea Systems 4181 push button switch has a plastic housing in black.

How much does the 4181 switch weigh? The Blue Sea Systems 4181 weighs 0.35 pounds.