Leyu provides DIN rail power supplies designed for industrial control cabinets, PLC systems, automation equipment, distribution boxes and electrical control applications.
Available models cover compact low-power units as well as higher-power solutions for demanding industrial loads. Depending on the series, output options include commonly used DC voltages such as 12V, 24V and 48V, with different wattage, enclosure width and cooling configurations available for different cabinet designs.
Selected models are designed for standard 35 mm DIN rail mounting, helping engineers install and replace power supplies efficiently inside electrical panels where space, wiring access and thermal management are important.
Choose the appropriate DIN rail power supply according to your required output voltage, load current, wattage, rail type, cabinet space and operating environment.
Quick DIN Rail Power Supply Selection Guide
Different Leyu series are designed for different installation and power requirements.
Series | Recommended Direction | Typical Use |
|---|
HDR Series | Ultra-slim design | Compact distribution boxes and space-limited cabinets |
MDR Series | Compact low-to-medium power | PLCs, controllers and general automation |
NDR Series | Industrial power range | Automation systems and control cabinets |
EDR Series | Industrial AC-DC power | Machinery and electrical control systems |
DR Series | Standard DIN rail design | General industrial control applications |
DRP Series | Higher-power models | Larger industrial loads and automation systems |
ZDR5 Series | Ultra-thin installation | Narrow control cabinets and compact electrical panels |
Actual voltage, wattage, dimensions and features vary by model. Always check the individual product specifications before final selection.
Choose a DIN Rail Power Supply by Series
HDR Series – Ultra-Slim DIN Rail Power Supply
The HDR Series is designed for applications where DIN rail width and cabinet space are limited.
Its slim form factor makes it suitable for compact electrical panels, distribution boxes and building or industrial control installations where several components must share the same DIN rail.
Depending on the model, different output voltages and wattage options are available.
Best suited for:
MDR Series – Compact Industrial DIN Rail Power Supply
The MDR Series provides compact AC-DC power conversion for industrial control equipment and automation systems.
This series is suitable for applications that require a relatively small DIN rail footprint while still providing regulated DC power for PLCs, relays, sensors and other control components.
Best suited for:
NDR Series – DIN Rail Power Supply for Industrial Automation
The NDR Series covers a wider range of industrial power requirements and is suitable for machinery, control cabinets and automation systems that require stable DC power.
Different models are available across multiple wattage levels, allowing engineers to select a suitable configuration according to connected load and cabinet design.
Best suited for:
EDR Series – Industrial AC-DC DIN Rail Power Supply
The EDR Series is designed for industrial electrical systems requiring DIN rail mounting and regulated DC output.
It can be considered for control cabinets, machinery and factory automation projects where installation convenience and stable power delivery are important.
Best suited for:
DR Series – Standard DIN Rail Power Supply
The DR Series provides a practical solution for general-purpose industrial and electrical control applications.
Different power ratings can support small control systems, auxiliary equipment and other installations where standard DIN rail mounting is required.
Best suited for:
DRP Series – High-Power DIN Rail Power Supply
For industrial systems with higher power requirements, the DRP Series provides higher-output DIN rail power options.
Selected models include additional functions such as power factor correction and multiple electrical protection features, depending on the specific configuration.
Best suited for:
ZDR5 Series – Ultra-Thin DIN Rail Power Supply
The ZDR5 Series is designed for installations where rail width is a major design constraint.
Its narrow form factor helps reduce occupied DIN rail space while providing regulated DC output for suitable industrial control and distribution applications.
Best suited for:
Narrow electrical cabinets
Compact distribution panels
Space-sensitive automation systems
High-density DIN rail installations
What Is a DIN Rail Power Supply?
A DIN rail power supply is an AC-DC switching power supply designed to mount directly onto a standardized metal rail inside an electrical enclosure or control cabinet.
Instead of being screwed directly to the machine chassis, the power supply clips onto the DIN rail together with components such as:
Circuit breakers
PLC modules
Relays
Terminal blocks
Contactors
Controllers
Signal modules
This modular installation method helps simplify panel assembly, wiring, maintenance and equipment replacement.
DIN rail power supplies are therefore widely used in industrial automation, control cabinets, machinery, building automation and electrical distribution systems.
Choose by Output Voltage
Output voltage is one of the first specifications to confirm when selecting a DIN rail power supply.
12V DIN Rail Power Supply
A 12V DIN rail power supply can be used for suitable low-voltage control systems, electronic equipment, security devices and other electrical components operating from 12V DC.
Before selecting a model, confirm both the required voltage and maximum load current.
24V DIN Rail Power Supply
24V DC is widely used in industrial automation and control systems, making 24V DIN rail power supplies an important option for PLC cabinets and machinery.
Typical connected equipment may include:
PLCs
Sensors
Relays
Industrial controllers
I/O modules
Actuators
Monitoring devices
Always calculate the total connected load before selecting the required wattage.
48V DIN Rail Power Supply
A 48V DIN rail power supply can support suitable industrial, communication and control equipment requiring a higher DC operating voltage.
The required current, power rating and installation conditions should be verified according to the actual equipment design.
Choose by Power Rating
After determining the required output voltage, calculate the maximum power required by the connected load.
Compact Power Range
Suitable for:
Medium Power Range
Suitable for:
PLC control panels
Multiple control devices
Building automation
Small machinery
Higher Power Range
Suitable for:
The selected wattage should not be based only on the nominal operating load. Startup current, peak demand, ambient temperature and equipment expansion should also be considered.
DIN Rail Width and Cabinet Space
DIN rail installations often contain many electrical components within a limited panel width.
For this reason, the physical width of the power supply can be almost as important as its electrical rating.
Before choosing a model, confirm:
An ultra-slim model may be preferable when several circuit breakers, relays, PLC modules and control devices must share the same rail.
A larger power supply may offer the required output power but still be unsuitable if it occupies too much cabinet space.
DIN Rail Mounting Compatibility
Selected Leyu DIN rail power supplies are designed for standard 35 mm mounting rails, including configurations such as TS-35/7.5 and TS-35/15, depending on the model.
Before ordering, confirm the mounting rail used in your control cabinet and verify compatibility with the selected power supply.
DIN rail mounting can provide several practical benefits:
Mounting specifications vary by model, so always check the individual technical information before installation.
How to Choose a DIN Rail Power Supply
Verify the AC supply available at the installation location and make sure the selected model supports the required input range.
Input specifications can vary between series.
2. Determine the Required DC Output
Identify the operating voltage of the connected equipment.
Common industrial requirements include:
Do not select the power supply until the required system voltage is confirmed.
3. Calculate the Total Load Current
Add the current requirements of all connected devices.
For example, if several PLC modules, sensors and relays are powered from the same 24V supply, their combined maximum current must remain within the output capability of the selected model.
4. Determine the Required Wattage
A basic calculation is:
Output Power (W) = Output Voltage (V) × Load Current (A)
If a 24V control system requires a maximum of 5A:
24V × 5A = 120W
The actual power supply selection should also consider startup current, temporary peak demand, ambient temperature and an appropriate engineering margin.
5. Check Available DIN Rail Space
Measure the available width inside the cabinet.
When space is limited, compact series such as ultra-slim or narrow DIN rail power supplies may provide a better fit than conventional wider models.
6. Confirm the Mounting Rail
Check whether your panel uses a compatible 35 mm rail configuration.
Always verify the specific rail compatibility listed for the selected model.
7. Evaluate Cabinet Temperature and Ventilation
Control cabinets can become significantly warmer than the surrounding room because heat is generated by:
Power supplies
PLCs
Drives
Relays
Contactors
Other electrical devices
Check operating temperature, required airflow and any derating information before installation.
Higher-power models may require greater clearance or airflow.
8. Check Protection Functions
Depending on the selected series, DIN rail power supplies may include functions such as:
Protection features vary by model and should be verified on the technical datasheet.
9. Confirm Required Certifications
Certification requirements depend on the project, destination market and end application.
If your equipment requires a specific standard or approval, provide this information during product selection.
Certification coverage should always be confirmed for the exact model rather than assumed for the entire product family.
DIN Rail Power Supply vs Enclosed Power Supply
DIN rail and enclosed switching power supplies can both provide regulated DC power, but their installation methods and typical applications are different.
Feature | DIN Rail Power Supply | Enclosed Power Supply |
Installation | Mounted on DIN rail | Mounted to equipment or chassis |
Typical Location | Electrical control cabinet | Inside machinery or electronic equipment |
Replacement | Quick rail removal | Usually screw-mounted |
Cabinet Integration | Excellent | Depends on equipment design |
Typical Application | PLC and automation panels | General machinery and electronics |
Choose a DIN rail power supply when the power unit will be integrated into a standardized control panel.
If your equipment requires a conventional chassis-mounted AC-DC supply, explore our Single Output Power Supply range.
Applications of DIN Rail Power Supplies
PLC Control Panels
DIN rail power supplies provide regulated DC power for PLC CPUs, I/O modules, sensors, relays and associated control components.
Industrial Automation
Automation systems use DIN rail power supplies to support controllers, monitoring devices and other DC-powered equipment installed inside control cabinets.
Factory Machinery
Industrial machinery often contains internal electrical panels where DIN rail mounting simplifies installation and maintenance.
Building Automation
DIN rail power supplies can be used in suitable HVAC controls, access systems, monitoring equipment and building control panels.
Electrical Distribution Boxes
Slim DIN rail models are particularly useful where available installation width is limited.
Communication and Monitoring Equipment
Regulated DC power can support communication modules, monitoring devices and industrial networking equipment installed inside electrical enclosures.
Selecting a DIN Rail Power Supply for PLC Systems
When choosing a power supply for a PLC control cabinet, start by listing every device connected to the DC bus.
This may include:
PLC CPU
Digital and analog I/O
Sensors
Relays
HMI components
Communication modules
Solenoid valves
Other auxiliary loads
Calculate the maximum current requirement and consider whether any devices have higher startup or switching current.
Then check:
Voltage → Current → Wattage → Cabinet Width → Temperature → Protection → Certification
For many industrial control systems, 24V DC is a common operating voltage, but the final power supply must always be selected according to the actual equipment specifications.
OEM DIN Rail Power Supply Solutions
If a standard DIN rail model does not fully match your project, Leyu can evaluate OEM or ODM requirements based on your electrical and installation specifications.
For faster evaluation, provide:
Based on these requirements, our team can recommend a suitable standard model or evaluate whether a customized solution is required.
Power Supply
Browse the complete Leyu power supply product range.
Single Output Power Supply
For chassis-mounted equipment requiring one regulated DC output.
Multiple Output Power Supply
For systems requiring two or more DC voltage rails.
UPS Power Supplies & Battery Chargers
For systems requiring power conversion together with battery charging or backup functions.
DC-DC Switching Power Supply
For systems requiring conversion from one DC voltage level to another.
Frequently Asked Questions
What is a DIN rail power supply?
A DIN rail power supply is an AC-DC switching power supply designed to mount directly onto a standardized DIN rail inside an electrical cabinet or control panel. It is commonly used to provide regulated DC power for PLCs, sensors, relays and automation equipment.
What DIN rail size do Leyu power supplies use?
Selected Leyu models are designed for standard 35 mm DIN rails, including configurations such as TS-35/7.5 and TS-35/15. Compatibility varies by model, so always check the technical specification before ordering.
Why is 24V commonly used for industrial control systems?
Many PLCs, sensors, relays and industrial control components are designed to operate from 24V DC. This makes 24V DIN rail power supplies a common choice for industrial automation, although the required voltage should always be confirmed from the equipment specifications.
How do I calculate the required DIN rail power supply wattage?
Multiply the required DC output voltage by the maximum load current. For example, a 24V system drawing 5A requires approximately 120W of nominal output power. Startup current, load variation, operating temperature and engineering margin should also be considered.
Which DIN rail power supply should I choose for a PLC control cabinet?
Confirm the required output voltage, total load current, wattage, available DIN rail width, cabinet temperature, rail type and certification requirements. For space-limited panels, a slim series may be preferable, while larger automation systems may require a higher-power DIN rail model.
Need Help Selecting a DIN Rail Power Supply?
Send us your control cabinet requirements and our team can help identify a suitable model.
We can recommend a suitable HDR, MDR, NDR, EDR, DR, DRP or ZDR5 DIN rail power supply according to your electrical and installation requirements.
