Axiomatic isolated DC to DC converters provide regulated DC output power from a DC input source while maintaining galvanic isolation between input and output circuits. They are used in mobile equipment, industrial machinery, off-highway vehicles, marine systems, power distribution panels, and other applications where control electronics, sensors, actuators, displays, communications devices, or auxiliary loads need stable DC power from a battery or system bus.

This product category includes isolated dc-dc converters designed for reliable operation in demanding electrical environments. Browse Axiomatic’s catalog to compare input voltage ranges, output voltages, output current ratings, power levels, connector options, enclosure styles, protection functions, communication features, and datasheets for available models.

What an Isolated DC to DC Converter Does

A dc to dc converter changes one DC voltage level into another DC voltage level. In many systems, the source voltage is not the voltage required by the load. A vehicle battery, alternator-fed bus, battery pack, or industrial DC supply may need to power electronics that require 5 VDC, 12 VDC, 24 VDC, 48 VDC, or another regulated output.

An isolated DC to DC converter adds electrical separation between the input and output. This DC isolation helps reduce ground loop issues, separates sensitive electronics from noisy supply rails, and allows different parts of a system to operate with independent reference points. Isolation can be especially important where power electronics, long cable runs, switching loads, high-current devices, or mixed-voltage subsystems are present.

Depending on the model, Axiomatic isolated converters may support wide input voltage ranges, regulated output power, current limiting, short-circuit protection, reverse polarity protection, over-temperature protection, and rugged packaging for machine or vehicle installation.

Here are our categories of isolated DC-Dc power converters:

Browse Models by Electrical Requirements

The starting point for selecting an isolated dc-dc converter is the relationship between the available input source and the required output load. Common selection questions include:

  • What is the nominal input voltage?
  • What is the minimum and maximum input voltage during operation?
  • What output voltage does the load require?
  • How much continuous output current is needed?
  • What peak or startup current does the load draw?
  • Is galvanic isolation required between the source and the load?
  • What protection features are needed?
  • What enclosure, mounting, and connector style fits the installation?

A system using a 24 VDC battery bus, for example, may need a regulated 12 VDC output for auxiliary electronics. Another design may require 24 VDC output from a higher voltage battery pack. In other cases, a converter may provide an isolated supply for controls, displays, sensors, radios, gateways, or distributed I/O modules.

Input Voltage Range

Input voltage range is one of the most important specifications for any dc-to-dc converter. Real-world DC systems rarely remain at a single nominal voltage. Battery voltage changes with state of charge, alternator output, cranking events, charging systems, transient conditions, cable voltage drop, and load changes.

A converter selected for a vehicle or machine should support the full operating range expected at the installation point. Equipment using a nominal 12 VDC or 24 VDC system may experience voltage dips, surges, and transient noise during normal operation. Industrial DC systems and battery-powered platforms can have their own input tolerance requirements.

Axiomatic datasheets list input voltage details so users can match the converter to the source. For high voltage power supplies or higher voltage battery systems, check the specific model ratings carefully, including isolation, power output, connector ratings, and any applicable installation notes.

Output Voltage, Current, and Power

After confirming the input source, select the required output voltage and output power. A DC converter should provide enough output current for the connected load under normal operating conditions, with appropriate allowance for startup demand, transient loads, and system margin.

Output power is calculated from output voltage and output current. A 12 VDC output at 10 A supplies up to 120 W. A 24 VDC output at 5 A also supplies up to 120 W. The right converter is not just the one with the correct voltage; it must also provide the required current continuously in the operating environment.

For sensitive electronics, regulated output voltage is often required. Regulated dc-dc switching converters help maintain a stable output even as input voltage and load conditions change, serving the same system-level role as voltage regulators in many control and auxiliary power circuits. Review the datasheet for output accuracy, ripple, response characteristics, and protection behavior.

Isolation in DC Power Systems

Isolation separates the input and output electrically while still transferring power through the converter. This is different from a non-isolated buck regulator or boost converter, where input and output typically share a common electrical reference.

Isolated converter designs are used when the system benefits from separating grounds, reducing noise coupling, supporting safety boundaries, or powering electronics that must not share the same return path as high-current equipment. In mobile and industrial systems, galvanic isolation can help protect control circuits from disturbances created by motors, solenoids, pumps, inverters, chargers, and other switching devices.

The degree and type of isolation required depends on the application. Review the isolation voltage and related specifications in the datasheet for each product model.

Converter Topologies and Selection

Different converter topologies solve different voltage conversion problems. Buck regulators step voltage down. A boost converter steps voltage up. Some dc-dc converters are designed mainly for regulation, while others are selected specifically for isolation, noise separation, or operation across wide input ranges.

For catalog selection, the practical question is usually not the internal topology first. It is the required input range, output voltage, output current, isolation rating, efficiency, protection features, and packaging. The datasheet provides the technical details needed to confirm whether a specific dc-to-dc converter is suitable for the system.

Applications for Isolated DC to DC Converters

Axiomatic isolated DC to DC converters are used in a wide range of equipment and power distribution designs across the Americas and global markets. Typical applications include:

  • Off-highway vehicles and mobile machinery
  • Construction, mining, agricultural, and forestry equipment
  • Marine and vessel electrical systems
  • Industrial automation and distributed control panels
  • Battery-powered machines and auxiliary power systems
  • Engine-driven equipment and generator systems
  • Control modules, sensors, displays, and telematics devices
  • Power conditioning for communications and monitoring equipment
  • Isolated supply rails for CAN-based control systems
  • Converting battery bus voltage for low-voltage electronics

In systems with electric drives, power inverter equipment, chargers, or high-current switching devices, isolated power supplies can provide separated power to controls and instrumentation. They are also useful where a DC to DC converter must be installed close to the load to reduce voltage drop or simplify wiring.

Environmental and Installation Considerations

Electrical ratings are only part of converter selection. The product must also fit the installation environment. Review the datasheet for enclosure rating, mounting method, connector type, operating temperature, vibration and shock ratings, and applicable compliance information.

For mobile equipment and industrial machinery, rugged packaging can be as important as the conversion rating. Heat, vibration, moisture, electrical noise, and installation constraints all affect long-term reliability. A converter installed in a harsh location may require a sealed enclosure, robust connectors, and derating considerations based on ambient temperature and load.

Mounting location also affects performance. Adequate heat dissipation, cable sizing, grounding strategy, fusing, and connector selection should be considered as part of the power system design.

Protection Features

Axiomatic isolated dc-dc converter models may include protection features designed to support reliable operation in real systems. Depending on the product, these may include:

  • Short-circuit protection
  • Overcurrent protection
  • Overtemperature protection
  • Reverse polarity protection
  • Input undervoltage or overvoltage behavior
  • Output regulation and limiting
  • Protection against harsh supply conditions

Protection features vary by model, so use the datasheet as the controlling reference. When comparing DC/DC converters, confirm both normal operating ratings and fault behavior. This is especially important for systems where the converter powers critical control electronics or is connected to a noisy supply bus.

Using Datasheets to Compare Models

Each product datasheet provides the detailed information needed to select and apply a converter. Before choosing a model, review:

  • Input voltage range
  • Output voltage
  • Output current and total power rating
  • Isolation rating
  • Efficiency and thermal characteristics
  • Electrical protection features
  • Connector pinout
  • Mechanical dimensions
  • Mounting details
  • Environmental ratings
  • Compliance and application notes

Datasheets also help distinguish between models that may look similar in a catalog list but differ in output power, connector configuration, control features, or enclosure type. For procurement, the datasheet and model number are the best references for confirming the correct part.

Selecting an Isolated DC to DC Converter from Axiomatic

Browse isolated DC DC converters by model and specification. Start with the available DC input source and required DC output, then narrow the selection by power rating, isolation, installation environment, and connector requirements.

For many applications, selection is straightforward: match the input range, output voltage, and output current, then confirm the isolation and environmental ratings. For more complex electrical systems, review the datasheet in detail and compare available models against the system’s voltage range, load profile, thermal conditions, and protection requirements.

If you need help choosing between models, contact Axiomatic with the input voltage range, required output voltage, load current, installation environment, and any isolation or protection requirements. Axiomatic can help identify suitable isolated DC to DC converter options from the product catalog.