DC Master 12/12-6 isolated

The main difference is galvanic isolation. The isolated model (ref. 81500700) provides full electrical isolation between input and output circuits, eliminating ground loops and electrical interference. The non-isolated model (ref. 81400200) does not offer this isolation. Galvanic isolation is particularly recommended for powering sensitive equipment such as VHF radios or navigation instruments on a boat.

The nominal output voltage of the DC Master 12/12-6 isolated converter is 13.6 V. This allows correct charging of a 12 V battery or powering 12 V equipment with a stabilized voltage, compensating for voltage drops in the wiring.

The input voltage range for full-power operation is 10 to 15.5 V. The converter can tolerate an input voltage from 0 to 16 V without damage, but outside the 10–15.5 V range, the output may be unregulated or the converter may shut down.

Installation involves several steps:

- Choose a cool, dry, and well-ventilated location.

- Use the supplied mounting bracket to mark the drilling points (3.5 mm).

- Secure the bracket with the supplied screws.

- Snap the converter onto the bracket.

- Connect the input wires (battery) first, then the output wires (load).

- Install a fuse on the positive cable near the battery.

Ensure the power source is turned off during installation.

No, it is not recommended. The IP20 protection rating does not protect against dust or moisture. Additionally, the ambient temperature must not exceed 30 °C for optimal operation. Beyond this, the converter reduces its power output (linear derating up to 80 °C). A motor compartment is often too hot and humid.

Input and output connections are made via Faston connectors (flat terminals). The converter is supplied with Faston terminals. It is essential to connect the input wires (from the battery) first, then the output wires (to the load). Observe polarity: positive (+) and negative (-).

Yes, it is compatible with 12 V lithium batteries, since its 13.6 V output voltage is suitable for charging lithium batteries (which typically require a charging voltage between 13.3 V and 14.6 V depending on the chemistry). However, for optimal charging, ensure that the 13.6 V output matches your lithium battery’s specifications. This converter is primarily a voltage stabilizer, not a smart charger with a specific charging profile.

Yes, this is a typical use case. Galvanic isolation eliminates ground loops and electrical interference, which is ideal for sensitive communication equipment such as a VHF radio. The 6A current is sufficient for most marine VHF radios.

Yes, that is exactly its function. It allows charging a 12V service battery from the 12V engine battery while stabilizing the voltage and preventing ground loops thanks to galvanic isolation. This ensures clean charging and protects sensitive equipment connected to the service battery.

No, this model is specifically designed for a nominal input voltage of 12V. It cannot be used with a 24V input. If you have a 24V installation, other models are available in the DC Master range, such as the 24/12-6A isolated (ref. 81500200) or the 24/12-12A isolated (ref. 81500300).

Yes, the product is delivered complete with a mounting bracket (clip), mounting screws, and Faston terminals for electrical connection. All the necessary components for basic installation are included in the packaging.

The user manual does not mention any specific protection against reverse polarity. It is therefore strongly recommended to strictly respect polarity when connecting (positive to positive, negative to negative). Reverse polarity could irreparably damage the converter.