500W 24V to 24V Isolated DC-DC Power Supply Solution for Railway Transit Systems

As railway transportation systems become increasingly intelligent, onboard electronic devices now require higher levels of power stability, EMI resistance, electrical isolation, and environmental reliability.

Modern railway systems such as:

• Metro trains
• High-speed rail
• Light rail vehicles
• Urban transit systems

widely use 24VDC onboard power architectures. However, traction motors, braking systems, long cable harnesses, and switching equipment often generate:

• Voltage surges
• Electromagnetic interference
• Ground loop noise
• Instantaneous load fluctuations

These issues may cause:

• TCMS restart failures
• Passenger information display malfunction
• Communication interruption
• Sensor data instability
• Control system errors

To improve system reliability, isolated 24V to 24V DC-DC converters are widely used in railway onboard secondary power systems.

Mingzinc MDJ500-24S24 Railway DC-DC Converter

The MDJ500-24S24 from Mingzinc Technology is a:

500W 24V to 24V Isolated IP65 Waterproof DC-DC Converter

designed specifically for:

• Train control systems
• TCMS
• Passenger information systems
• Railway communication equipment
• Onboard monitoring systems

The converter features:

• Fully sealed aluminum housing
• Potting thermal structure
• Natural cooling
• Input-output electrical isolation
• Industrial EMI suppression design

ensuring stable operation under harsh railway environments.

Why Railway Systems Need Isolated 24V to 24V DC-DC Converters

Although both input and output are 24VDC, railway applications still require electrical isolation because of:

• Complex grounding systems
• Common-mode interference
• Motor surge noise
• Long-distance cable interference
• High transient voltages

An isolated 24V to 24V converter helps:

• Eliminate ground loop problems
• Suppress surge interference
• Protect sensitive electronics
• Improve system reliability
• Ensure electrical safety

Typical Applications of MDJ500-24S24

TCMS Train Control Systems

Provides isolated and stable onboard power.

Passenger Information Systems (PIS)

Powers onboard displays and broadcast systems.

Onboard Surveillance Systems

Ensures stable power for cameras and monitoring modules.

Railway Communication Equipment

Reduces EMI interference for reliable communication.

Signal Acquisition Modules

Provides clean 24VDC output for sensors and control devices.

Key Electrical Specifications

Key Technical Advantages

Wide Input Voltage Range

Supports 18–36VDC input range to handle:

• Train startup
• Braking energy feedback
• Voltage fluctuation
• Cable voltage drop

while maintaining stable 24V output.

Dual Electrical Isolation Design

Input-to-output electrical isolation effectively suppresses:

• Common-mode noise
• Ground loop interference
• Surge voltage
• High-frequency disturbances

protecting sensitive onboard electronics.

T-Type Input Filter and EMI Protection

Built-in T-type filtering circuit helps reduce:

• EMI noise
• Voltage spikes
• Motor interference
• High-frequency switching noise

ideal for railway electronic systems.

Fully Sealed IP65 Housing

The converter adopts a fully potted aluminum enclosure with:

• Waterproof protection
• Dustproof protection
• Shock resistance
• Anti-vibration capability
• Salt spray resistance

suitable for harsh railway environments.

High Reliability for Long-Term Operation

Industrial-grade components and optimized thermal design support:

• Continuous operation
• High vibration environments
• Long service life
• High-temperature operation

helping reduce railway maintenance costs.

Comprehensive Protection Functions

The MDJ500-24S24 includes:

• Input undervoltage protection
• Output overvoltage protection
• Output overcurrent protection
• Short circuit protection
• Overtemperature protection
• Isolation protection

for safe railway system operation.

Flexible Input Platforms and Customization

Mingzinc supports multiple input voltage platforms:

• 9–18VDC
• 9–36VDC
• 18–36VDC
• 66–154VDC
• 400–800VDC

Custom services include:

• Single output versions
• EMI enhanced versions
• Custom dimensions
• OEM/ODM solutions
• Special mounting structures

About Guangdong Mingzinc Technology Co., Ltd.

Guangdong Mingzinc Technology Co., Ltd. specializes in:

• AC/DC power modules
• DC/DC converters
• Railway power supplies
• Industrial power systems
• New energy power solutions

Our products are widely used in:

• Railway transportation
• Industrial automation
• Robotics
• Energy storage systems
• Solar power systems
• Communication equipment

Mingzinc provides OEM/ODM customization and engineering support for industrial-grade power applications.

Get MDJ500-24S24 Datasheet and Technical Support

If you are looking for a reliable:

• 24V to 24V isolated DC-DC converter
• Railway onboard power supply
• TCMS power module
• PIS power converter
• Railway communication power solution

welcome to contact Mingzinc Technology for:

• Datasheets
• Engineering support
• EMI optimization solutions
• OEM/ODM customization 
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