Blue Sea Systems 1039 Dual USB Charger, 12/24V 4.8A, Contura Switch Mount

The Blue Sea Systems 1039 is a dual-port USB charger built for 12/24V marine electrical systems, designed to mount directly into an existing contura switch aperture for a clean, integrated look on the helm or dash. It uses intelligent device recognition to automatically charge at the speed required by the connected phone, tablet, or other mobile device, regardless of brand, delivering up to 4.8A DC total output across its two USB Type A ports at 5V DC +/- 5%. The unit accepts a wide 9V-32V DC input range, making it suitable for both 12V and 24V marine systems.

Internal filtering reduces electronic interference, an important feature for boats running sensitive electronics and communication equipment. The circuit board is conformal coated to withstand the harsh marine environment, and a protective dust cap keeps debris and moisture out of the ports when not in use. Built-in protections include over temperature protection, thermal overload protection, short circuit protection, and reverse polarity protection. Parasitic current draw is just 1mA when not actively charging, minimizing battery drain. The 1039 mounts in an existing contura switch aperture; Blue Sea Systems also offers the 1045 version for installations requiring a common 1-1/8 inch hole mount, which is a separate part.

Specifications

• Brand: Blue Sea Systems
• Manufacturer Part Number: 1039
• Color: Black
• Number of Ports: 2
• Connector Type: USB Type A
• Input Voltage Range: 9V-32V DC
• Output Voltage: 5V DC +/- 5%
• Maximum Output Current: 4.8A DC (total)
• Parasitic Current Draw: 1mA (not charging)
• Mounting: Mounts in an existing contura switch aperture (1.45 inch x 0.83 inch)
• Protection Features: Over temperature protection, thermal overload protection, short circuit protection, reverse polarity protection
• Weight: 0.1 pounds
• UPC: 632085010393

Fitment

Designed for 12V and 24V marine electrical systems with an existing contura switch aperture (1.45 inch x 0.83 inch) for mounting.

Frequently Asked Questions

What voltage systems does the Blue Sea Systems 1039 work with? The 1039 accepts a 9V-32V DC input range, so it works on both 12V and 24V marine electrical systems.

How many devices can I charge at once with the 1039? Two devices at a time, since the 1039 has two USB Type A ports and delivers up to 4.8A DC total output across both.

Does the 1039 charge tablets as well as phones? Yes, intelligent device recognition lets the 1039 charge phones, tablets, or other mobile devices at the speed each specific device requires, regardless of brand.

What size cutout does the 1039 require for installation? It mounts in an existing contura switch aperture measuring 1.45 inch by 0.83 inch, rather than requiring a new hole to be cut.

Is the 1039 the same as the 1045? No, the Blue Sea Systems 1039 mounts in an existing contura switch aperture, while the 1045 is a separate part designed to mount in a common 1-1/8 inch hole.

What protections are built into this charger? The 1039 includes over temperature protection, thermal overload protection, short circuit protection, and reverse polarity protection.

Will this charger drain my battery when it is not in use? Parasitic current draw on the 1039 is only 1mA when not actively charging, which is minimal.

Is the 1039 built to handle a marine environment? Yes, the Blue Sea Systems 1039 has a conformal coated circuit board for the harsh marine environment and a protective dust cap to keep out debris and moisture.

What output voltage does the 1039 provide? It outputs 5V DC +/- 5% through its USB Type A ports.

How much does the 1039 weigh? The Blue Sea Systems 1039 dual USB charger weighs 0.1 pounds.

What color is the 1039 charger? It is finished in black.

Does the 1039 reduce interference with onboard electronics? Yes, internal filtering in the 1039 reduces electronic interference, which helps protect nearby marine electronics and communications equipment.