Description
Blue Sea 7937 DPDT Switch | Boat Supply Store
This Blue Sea 7937 Contura II switch provides robust, marine-grade control for dual-function electrical circuits, essential for maintaining reliable operation in demanding offshore conditions. Its DPDT (Double Pole/Double Throw) configuration allows for independent switching of two separate circuits, rated at 20A @ 12V or 15A @ 24V, ensuring capability for high-demand equipment. The internal and external gasket seals offer superior water resistance, while the vibration and shock resistance ensures longevity on actively navigated vessels, making it ideal for critical bilge pump or navigation light systems.
Key Features
- Robust DPDT (Double Pole/Double Throw) configuration for managing two independent circuits.
- Contura II actuator design provides a tactile and durable user interface.
- Water-resistant sealing with internal and external gasket protection against moisture ingress.
- Durable construction resistant to vibration, shock, thermoshock, and salt spray.
- Integrated LED illumination offering 100,000 hours of long-lasting visual feedback.
- High amperage ratings of 20A @ 12V and 15A @ 24V for demanding marine applications.
- Wide operating temperature range from -40°C to 85°C for all-weather reliability.
- Designed for marine panels compatible with Blue Sea Systems Contura mounting solutions.
Specifications
| Product Specifications | |
|---|---|
| Switch Type | DPDT (Double Pole/Double Throw) |
| Actuator Type | Contura II |
| Actuator Color | Black |
| Action | (ON)-OFF-ON |
| Voltage Rating | 12V DC / 24V DC |
| Amperage Rating (12V) | 20A |
| Amperage Rating (24V) | 15A |
| Sealing | Internal and external gasket panel seal |
| Resistance | Vibration, shock, thermoshock, moisture, salt spray |
| Illumination | Embedded LED |
| LED Lifespan | 100,000 hours |
| Operating Temperature | -40°C to 85°C |
| Weight | 0.09lb (0.04 kg) |
Who This Is For
Marine enthusiasts, boat builders, and DIYers requiring reliable and durable electrical switching solutions for dual-function applications on vessels. This switch is perfect for those who need dependable control over independent circuits in harsh marine environments.
How It Compares
| Feature | Blue Sea 7937 DPDT Switch | Carling Technologies L Series L2D1 |
|---|---|---|
| Action | (ON)-OFF-ON | ON-OFF-ON, ON-OFF-ON |
| Pole/Throw | DPDT | DPDT, DPDT |
| Actuator Type | Contura II Paddle | Sealed Rocker, Sealed Toggle |
| Maximum Amperage (12V) | 20A | 20A, 20A |
| Sealing | Internal and external gasket panel seal | Sealed, Sealed |
| LED Lighting | Embedded LED (100,000 hours) | Optional, None |
Common Concerns Answered
Are replacement parts readily available for older Contura panels?
While specific replacement parts for older Contura panels can occasionally be challenging to locate, the Blue Sea 7937 is a current production model designed for widespread compatibility with Blue Sea Systems' mounting panels, ensuring continued support.
Is the LED illumination too bright for nighttime use?
The LED illumination is designed for clear visibility in marine conditions; however, brightness can be subjective. If excessive brightness is a concern in very dark environments, consider custom dimming solutions or placement away from direct line of sight.
Is this switch submersible?
This switch features an internal and external gasket panel seal, making it water-resistant and suitable for use in washdown areas or environments with spray. It is not rated for prolonged submersion.
Frequently Asked Questions
What is the amperage rating for the Blue Sea 7937 Contura II Switch?
The Blue Sea 7937 Contura II Switch is rated for 20A at 12V DC and 15A at 24V DC.
What does DPDT mean for this switch?
DPDT stands for Double Pole, Double Throw. This means the switch has two independent sets of contacts (poles) that can each control two separate circuits (throws), allowing for more complex switching configurations like reversing polarity or controlling two devices simultaneously.
Is this switch waterproof or water-resistant?
This switch is water-resistant, featuring an internal and external gasket panel seal to protect against moisture and spray. It is designed to withstand harsh marine environments but is not rated for submersion.
What type of applications is this switch commonly used for?
This DPDT (ON)-OFF-ON switch is commonly used for applications requiring control over two separate circuits, such as switching between two different power sources, controlling a dual-function device like a trim tab system, or managing bilge pump operation with an alternate override.
What is the operating temperature range of this switch?
The Blue Sea 7937 Contura II Switch operates reliably within a temperature range of -40°C to 85°C (-40°F to 185°F).
