Automatic switch 2×70 A – code: 3939184 – Italian Nautical Supplies

Automatic switch 2×70 A (code 3939184) – intelligent onboard charging management

The automatic switch 2×70 A code 3939184 by Forniture Nautiche Italiane is a component designed for managing charging on onboard electrical systems with two batteries. Its main function is to operate as an automatic isolator/distributor, allowing simultaneous charging of two batteries while maintaining separation between the lines, in order to organize power supply and charging in an orderly and functional way.

It is suitable for those who want a clean and professional installation within electricity and instrumentation, con un dispositivo progettato per lavorare con , with a device designed to work with very low voltage drop (0.25 V) and with a structure made of finned aluminum.

Features and construction details

to promote heat dissipation.

Automatic isolator distributor with low voltage drop This switch is described as an with , with a device designed to work with. automatic battery isolator distributor.

. In an onboard system, voltage drop is an important parameter because it affects the voltage actually available for charging and managing loads. Choosing a low-drop device is useful when you want to limit losses along the charging line.

The device Simultaneous charging of two batteries, with allows charging two batteries simultaneously. 70 A output . Furthermore, it is indicated that it can, provide more charge to the battery with the lower charge.

, a useful feature when the two batteries are not at the same charge level and a more functional automatic distribution is desired.

The construction is in aluminum with wide finning, designed to effectively dissipate heat. In the nautical field, where spaces can be limited and ventilation is not always optimal, good dissipation is a practical element for the installation and thermal management of the component.

Dimensions

The declared dimensions are 130×130×70 mm. This data is useful for evaluating the housing in the technical compartment, near the electrical panel or in an area dedicated to battery distribution and charging.

Product identification

• Product: Automatic switch 2×70 A
• Supplier code: 3939184
• Supplier: Forniture Nautiche Italiane srl
• SKU: FNI00000207

Typical applications in the nautical field

The automatic switch is designed for contexts where a charging system is present (for example from an alternator or charger) and you want to orderly manage the charging of two batteries while maintaining separation between circuits. It is a component used in many onboard system configurations, especially when you want to:

• manage two batteries with an automatic distribution logic;
• reduce the need for manual interventions in selecting the battery to charge;
• organize the system in a more clean and rational in the electrical panel or battery compartment;
• integrate a device with low voltage drop in the charging line.

Falls under the category Electric cables and accessories / Electricity and instrumentation, consistent with installations and maintenance of onboard electrical systems where battery management is central.

Practical advantages

Automatic charging management on two batteries

The ability to charge two batteries simultaneously simplifies system operation, especially when you want to keep two batteries ready for use without having to manually intervene in the selection. The function that provides more charge to the battery with the lower charge helps manage differences in charge state between the two units.

Lower losses thanks to low voltage drop

The voltage drop of 0.25 V is a relevant data point for those who care about the efficiency of the charging line. In general, a contained drop helps maintain a voltage closer to that available at the output of the charging source, with practical benefits in the overall management of the system.

Heat dissipation with finned structure

The body in aluminum with wide finning is designed to promote thermal dissipation. This aspect is particularly useful in installations where the component may be subjected to workloads and where heat management is an element to consider when choosing the mounting position.

Compact size for integration in technical compartments

With dimensions 130×130×70 mm, the device is suitable to be placed in technical compartments or near electrical distribution points, facilitating an orderly arrangement of wiring and easier maintenance of the system.

Use, installation, and operational notes

For correct use in the nautical field, it is advisable to consider the switch as part of a broader system (batteries, charging source, wiring, and protections). During installation and maintenance, some general good practices can help achieve a professional result:

• Check the clearances: check the available space according to the dimensions 130×130×70 mm and plan a positioning that favors heat dissipation.
• Neat wiring: arrange clear and well-secured cable passages, consistent with the system logic and with the separation of battery lines.
• Accessibility: install the component in an inspectable point to facilitate checks and maintenance interventions.
• System compatibility: evaluate integration with the rest of the system based on the configuration of the two batteries and the intended charging source.

FAQ – Frequently Asked Questions

What is the 2×70 A automatic disconnector used for?

It serves as an automatic isolator/splitter for managing charging on systems with two batteries, allowing simultaneous charging and keeping the lines separate.

How many batteries can this distributor manage?

It is designed for the simultaneous management and charging of two batteries.

What is the declared voltage drop?

The declared voltage drop is 0.25 V.

What material is it made of and why is it finned?

It is made of aluminum with wide fins, designed to effectively dissipate heat.

What are the dimensions of the device?

The declared dimensions are 130×130×70 mm.