Description
Blue Sea 7943 Contura II SPDT (ON)-OFF-ON Switch | Boat Supply Store
Engineered for rigorous marine duty, this Single Pole Double Throw (SPDT) switch provides precise circuit control with its unique (ON)-OFF-ON configuration. It offers a momentary ON function on both poles, ideal for activating intermittent functions or alarms. Rated for extreme conditions, it withstands vibration, shock, thermoshock, moisture, and salt spray, ensuring reliability on vessels operating in harsh saltwater environments like the Gulf Coast.
Key Features
- Momentary activation with (ON)-OFF-ON functionality
- SPDT circuit control for versatile application
- Marine-grade resistance to vibration, shock, and thermoshock
- Environmental sealing against moisture and salt spray
- Contura II actuator for reliable operation
- Panel-ready for Contura mounting systems
- Durable construction for extended service life
- Black aesthetic for integrated helm appearance
Specifications
| Product Specifications | |
|---|---|
| Actuator Style | Contura II |
| Circuit Type | SPDT |
| Function | (ON)-OFF-ON |
| Color | Black |
| Environmental Resistance | Vibration, shock, thermoshock, moisture, and salt spray resistant |
| Mounting Compatibility | Contura Water Resistant Panels and Contura Switch Mounting Panels |
Who This Is For
Marine enthusiasts, boat builders, and DIYers requiring a robust, weather-resistant switch for onboard electrical systems. This is particularly suited for applications demanding a momentary ON function alongside standard ON and OFF states.
How It Compares
| Feature | Blue Sea 7943 Contura II SPDT (ON)-OFF-ON Switch | Carling Technologies Contura II SPDT |
|---|---|---|
| Actuator Style | Contura II | Contura II, Toggle with rubber boot |
| Circuit Type | SPDT | SPDT, SPDT |
| Function | (ON)-OFF-ON | (ON)-OFF-ON, (ON)-OFF-ON |
| Environmental Resistance | Vibration, shock, thermoshock, moisture, salt spray resistant | Sealed to IP67, Weatherproof |
| Mounting Compatibility | Contura Water Resistant Panels and Contura Switch Mounting Panels | Contura panels, Standard panel mount |
Common Concerns Answered
I can't find a mounting panel for this switch.
The Blue Sea 7943 Contura II switch is designed for seamless integration with Blue Sea Systems' Contura Water Resistant Panels and Contura Switch Mounting Panels, ensuring a secure and watertight installation.
The (ON)-OFF-ON function seems confusing.
The (ON)-OFF-ON configuration provides a momentary ON position on both poles, meaning the circuit is energized only while the switch is held in the ON position for those poles. This is distinct from a standard maintained ON-OFF switch and is ideal for specific control requirements.
Is this switch truly waterproof for marine use?
Yes, the Contura II series is engineered with robust resistance to vibration, shock, thermoshock, moisture, and salt spray, making it exceptionally durable and reliable in harsh marine environments.
Frequently Asked Questions
What is the function of a SPDT ON-OFF-ON switch?
A SPDT (Single Pole Double Throw) ON-OFF-ON switch controls two separate circuits or paths from a single input. The ON-OFF-ON configuration allows for a maintained OFF state in the center position, and momentary ON states in the outward positions for each pole.
Is the Blue Sea 7943 Contura II switch waterproof?
While not fully submersible, the Blue Sea 7943 Contura II switch is designed to be highly resistant to moisture and salt spray, suitable for exposed marine applications when properly panel-mounted.
What type of panel can the Blue Sea 7943 Contura II switch be mounted in?
This switch is specifically designed for mounting in Blue Sea Systems Contura Water Resistant Panels and Contura Switch Mounting Panels for optimal environmental sealing and fitment.
What are the dimensions of the Blue Sea 7943 Contura II switch?
The exact dimensions are typically standard for Contura II style switches, requiring a panel cutout of approximately 1.45" x 1.06" (36.8mm x 26.9mm), with an overall actuator size of 1.74" x 1.29" (44.2mm x 32.8mm).
What is the electrical rating of the Blue Sea 7943 Contura II switch?
The electrical rating for the Blue Sea 7943 switch is typically 20A @ 12VDC and 10A @ 24VDC, suitable for most common marine DC circuits.
