Deck Mount 4-Pin Connector 12V (Waterproof, 3A) – Female Coupler

This deck-mounted 4-pin female connector offers a convenient solution for electrical hookups of accessories and equipment while ensuring environmental protection. Made of high-quality plastic, the connector is lightweight yet durable and designed to withstand marine conditions. Its four metal pins (terminals) reside inside a cylindrical housing with a threaded collar, which allows securing with a nut from the backside of a panel for a firm installation.

When the connector is not in use, an integrated cap with a rubber O-ring covers the opening tightly. This shields the contacts from water ingress (rain, sea spray) and debris (dust, salt deposits), keeping them dry and clean. In closed position, the connector achieves a high level of water resistance (approximately IP65/IP66 – able to resist water jets, though not intended for prolonged submersion).

Electrical characteristics: Each of the four terminals can carry up to 3A at 12V DC, which is sufficient for low-power loads and signal circuits. In total, the connector can service devices with multiple circuits (for instance, a combination of power and data) or a small AC circuit if used in that capacity. The contacts are brass with a protective plating, ensuring good conductivity and corrosion resistance.

Example applications:

• Connecting a portable spotlight or deck light that requires more than two wires (for example, positive, negative, and a control wire for modes) – this connector allows the device to be plugged in when needed and quickly unplugged for storage.
• Installing a multi-function panel or sensor – e.g., a solar panel with a built-in sensor or a navigation antenna that has both power and signal leads – where all necessary connections route through one connector.
• Wiring a small onboard charger or shore power inlet – the 4-wire format can allow separation of circuits (e.g., +, –, earth, control).
• Any scenario where you want quick disconnection of a device without compromising sealing: mounting this connector on deck enables the device to be connected as needed and then removed safely after use.

To utilize the connector, a matching male 4-pin plug is required (usually offered as a separate accessory) to mate with the socket. Connection is made by aligning the key/notch and pushing the plug in fully – the contacts engage to establish electrical connection. Some models include a locking ring or bayonet mechanism that secures the plug in place to prevent accidental unplugging.

Installation: Drill a hole of the appropriate diameter (per specs, typically ~20–22 mm) at the desired location. Insert the connector from the outside, apply a sealing gasket or marine silicone around the flange (for additional waterproofing), then tighten it from behind with the provided nut. Attach your four wires to the terminals (via screws or soldering – depending on design) according to color code/function. Now the connector is set – keep the cap closed whenever the plug is not inserted.

This 4-pin deck coupler allows for flexible electrical configurations on your boat while maintaining a sleek and weatherproof installation.