• Home
• Power Supplies & Electrical Accessories
• Switchmode Power Supplies 5V, 12V, 24V & 48V
• DIN Rail Power Supplies | 12V, 24V & 48V Mean Well

DIN Rail Switchmode Power Supplies

---

DIN Rail Switchmode Power Supplies

Shop a range of DIN rail power supplies at Aus Electronics Direct. Our selection includes Mean Well DIN rail-mounted switchmode power supplies designed to deliver regulated DC power for industrial automation, electrical control panels and electronic equipment.

Choose from different output voltages, including 12V, 24V and 48V DC, with a variety of wattage and current ratings to suit different electrical applications. Whether you need a compact power supply for a control system or a higher-capacity unit for industrial equipment, our range offers reliable power conversion solutions.

Types of DIN Rail Power Supplies

Our range includes different DIN rail switchmode power supplies to suit various voltage and power requirements.

• 12V DIN Rail Power Supplies: Suitable for compatible electronic equipment, control systems, sensors and low-voltage applications.

• 24V DIN Rail Power Supplies: Commonly used in industrial automation, PLC systems, control panels and machinery.

• 48V DIN Rail Power Supplies: Designed for compatible industrial equipment, communication systems and specialised electronic applications.

• High-Wattage DIN Rail Power Supplies: Suitable for applications requiring higher current output and greater DC power capacity.

Benefits of DIN Rail Switchmode Power Supplies

DIN rail power supplies provide a convenient way to integrate DC power into electrical control cabinets and industrial installations. Their standardised mounting design allows them to be securely installed on compatible DIN rails, helping organise electrical components and simplify installation.

Mean Well switchmode power supplies offer features such as regulated DC output, universal AC input, high efficiency and electrical protection. Depending on the model, additional features may include overload protection, overvoltage protection, short-circuit protection and LED power indicators.

How to Choose the Right DIN Rail Power Supply

When selecting a DIN rail power supply, consider the required output voltage, current rating and total wattage of your connected equipment.

For example, a 24V DC control system requires a compatible 24V power supply, while a 12V application needs a suitable 12V output. Calculate the total power consumption of the connected devices and select a power supply with sufficient capacity for the application.

You should also check the AC input voltage range, DIN rail mounting compatibility, physical dimensions, operating temperature and ventilation requirements.

Browse our range of DIN rail switchmode power supplies at Aus Electronics Direct to find a suitable Mean Well power supply for your industrial, commercial or electronic application.

FAQ

1. What is a DIN rail power supply?

A DIN rail power supply is an electrical device designed to convert AC mains electricity into regulated DC power for industrial and electronic equipment. It features a mounting system that allows it to attach directly to a standard DIN rail inside an electrical enclosure or control cabinet. DIN rail power supplies are commonly used in industrial automation, PLC systems, control panels, sensors and machinery.

2. How does a DIN rail switchmode power supply work?

A DIN rail switchmode power supply (SMPS) converts alternating current (AC) into regulated direct current (DC) using high-frequency switching technology. The internal circuitry rectifies the AC input, switches the electrical current at high frequency and regulates the DC output through electronic feedback. This design provides efficient power conversion in a compact housing suitable for DIN rail installation.

3. What are the benefits of using a DIN rail power supply?

DIN rail power supplies offer several advantages for industrial and electrical installations, including:

• Easy installation: Mounts directly onto compatible DIN rails.

• Space efficiency: Compact designs help maximise control cabinet space.

• Regulated DC output: Provides stable power for compatible electronic equipment.

• Organised wiring: Helps keep electrical installations neat and accessible.

• Protection features: Many models include overload, overvoltage and short-circuit protection.

• Industrial applications: Suitable for automation systems, machinery and control panels.

4. How do I choose the right DIN rail power supply?

To choose the right DIN rail power supply, consider the following specifications:

• Output voltage: Match the DC output voltage to your equipment's requirements.

• Output current: Ensure sufficient current capacity for all connected devices.

• Wattage: Calculate the total power consumption of the connected equipment.

• AC input range: Confirm compatibility with your mains supply.

• Mounting compatibility: Check that the power supply supports your DIN rail type.

• Operating environment: Consider temperature, ventilation and installation conditions.

• Protection features: Look for appropriate electrical and thermal protection.

Always check the manufacturer's datasheet before selecting a power supply.

5. What is the difference between 12V, 24V and 48V DIN rail power supplies?

The main difference is the DC output voltage supplied to connected equipment.

• 12V DIN rail power supplies: Commonly used for compatible electronic equipment, sensors, LED lighting and control devices.

• 24V DIN rail power supplies: Widely used in industrial automation, PLC systems, control panels and machinery.

• 48V DIN rail power supplies: Suitable for compatible industrial equipment, communication systems and specialised electronic applications.

The correct voltage depends on the electrical requirements of your connected equipment. Using an incorrect voltage may damage electronic components.

6. What is the difference between Mean Well HDR, MDR and EDR power supplies?

Mean Well HDR, MDR and EDR are different series of DIN rail-mounted switchmode power supplies designed for various installation requirements and applications.

• HDR Series: Slim, compact power supplies designed for space-conscious installations, with different output voltage and power options.

• MDR Series: Compact DIN rail power supplies commonly used in industrial control systems and electronic equipment.

• EDR Series: Industrial DIN rail power supplies designed for applications requiring different power capacities and operating characteristics.

The series differ in dimensions, output ratings, efficiency, cooling arrangements and electrical specifications. Always compare individual model datasheets to select the appropriate unit.

7. What does wattage mean when choosing a DIN rail power supply?

Wattage measures the electrical power a DIN rail power supply can deliver to connected equipment. It is calculated by multiplying the DC output voltage by the output current.

For example, a 24V power supply rated at 5A provides:

\[ 24V \times 5A = 120W \]

A higher-wattage power supply can generally support a greater electrical load, provided its output voltage and current specifications are suitable. Select a model with sufficient capacity for your equipment and operating conditions.

8. How do I calculate the required power supply capacity?

To calculate the required power supply capacity, add together the wattage requirements of all connected devices.

Use the following formula:

\[ P = V \times I \]

For example, if a 24V control system draws 3A:

\[ 24V \times 3A = 72W \]

The equipment requires at least 72W of output power. You should generally allow an additional 20–30% capacity where appropriate to accommodate load variations, startup current and operating conditions.

For systems with multiple devices, consider their combined continuous load and any peak current requirements.

9. What is a 35mm DIN rail power supply?

A 35mm DIN rail power supply is designed to mount onto a standard 35mm-wide DIN rail, commonly used in industrial electrical enclosures and control cabinets. The mounting mechanism allows the power supply to clip securely onto the rail without requiring separate mounting brackets. Check the manufacturer's specifications to confirm compatibility with the particular DIN rail profile.

10. Are DIN rail power supplies suitable for industrial automation?

Yes. DIN rail power supplies are widely used in industrial automation because they provide regulated DC power for compatible control and monitoring equipment. Common applications include:

• Programmable logic controllers (PLCs).

• Industrial sensors and actuators.

• Control panels and automation systems.

• Relay and switching circuits.

• Manufacturing machinery.

• Monitoring and communication equipment.

Their compact mounting design makes them convenient for installation inside industrial control cabinets.

11. What protection features should I look for in a DIN rail power supply?

When choosing a DIN rail power supply, consider the following protection features:

• Overload protection: Helps protect the power supply when connected equipment draws excessive current.

• Overvoltage protection: Helps prevent excessive DC output voltage.

• Short-circuit protection: Helps protect the power supply during output electrical faults.

• Overtemperature protection: Helps prevent damage caused by excessive operating temperatures.

• Input protection: May include protection against certain AC input faults, depending on the model.

Check the manufacturer's datasheet to confirm which protection features are included.

12. Do DIN rail power supplies require additional cooling?

Not all DIN rail power supplies require additional cooling. Many models use natural convection to dissipate heat through their housing, while some higher-power units incorporate built-in cooling fans.

Adequate ventilation is important for maintaining reliable operation. Follow the manufacturer's recommended mounting orientation, clearance distances and operating temperature limits. Avoid installing power supplies in confined spaces without sufficient airflow.

13. What is universal AC input on a DIN rail power supply?

Universal AC input means a power supply supports a specified range of alternating current input voltages rather than requiring one fixed input voltage. Some DIN rail power supplies support input ranges such as 85–264V AC, although the exact range varies between models.

This feature allows compatible units to operate across different mains voltage systems. Always check the product datasheet for the supported input voltage and frequency range.

14. How do I safely install and wire a DIN rail power supply?

DIN rail power supplies typically have terminals for AC input, DC output and protective earth connections. Safe installation involves the following steps:

1. Disconnect the mains power before installation.

2. Check the manufacturer's wiring diagram and terminal markings.

3. Confirm the AC input and DC output specifications.

4. Securely mount the power supply onto the compatible DIN rail.

5. Connect the protective earth terminal where provided and required.

6. Connect the DC output terminals, observing the correct polarity.

7. Secure all wiring connections and protect exposed terminals.

8. Allow adequate ventilation and mounting clearance.

9. Inspect the installation before energising the equipment.

Important: DIN rail power supplies can expose installers to dangerous mains voltages. Mains wiring and installation must be performed by a suitably licensed electrician in accordance with applicable Australian electrical requirements.

---