250W 110V to 48V Isolated DC-DC Converter for Railway Network Equipment | MDB250-110S48
MDB250-110S48 250W Isolated DC-DC Converter
Input: 66–154VDC
Output: 48VDC
Rated Power: 250W
Output Type: Isolated Single Output
Application: Railway Onboard Network & Communication Equipment
The MDB250-110S48 is a 250W isolated DC-DC converter designed to convert a 110VDC railway power bus into stable 48VDC power for onboard network and communication equipment.
Its wide 66–154VDC input range accommodates practical voltage variations caused by battery charging, discharging, changing onboard loads and different railway operating conditions.
The stable 48VDC output can support:
Industrial Ethernet switches
Communication gateways
Network communication units
Data communication equipment
Railway monitoring network devices
Other 48V auxiliary electronics
Its input-to-output galvanic isolation creates electrical separation between the 110VDC railway power domain and sensitive downstream network electronics, helping reduce interference coupling and ground-related problems.
With 250W output capacity, the MDB250-110S48 also provides practical power margin for applications requiring multiple 48V network and communication loads.
For railway projects requiring different electrical or mechanical specifications, MINGZINC provides OEM/ODM customization for input/output parameters, interfaces, mounting and thermal solutions.
Key Features
250W isolated DC-DC converter
Wide 66–154VDC input range
Stable regulated 48VDC output
110VDC to 48VDC power conversion
Input-to-output galvanic isolation
Designed for railway network equipment
EMI/EMC-resistant power design
Stable output under changing operating conditions
Suitable for vibration and continuous operation
Industrial electrical protection
Customized interfaces and mounting available
OEM/ODM engineering support
Typical Applications
Railway Industrial Ethernet Switches
Railway Communication Gateways
Onboard Network Equipment
Data Communication Equipment
Railway Communication Units
Railway Monitoring Networks
48V Railway Auxiliary Electronics
I. MODELS LIST
Single Channels Output
Model | Input Voltage (VDC) | Input Voltage Range (VDC) | Output voltage (VDC) | Output Current(A) | Output Power(W) | Ripple And Noise(mv) | Efficiency (Typ) |
MDB250-110S48 | 110VDC | 66-154VDC | 48VDC | 5.2A | 250W | 300 | 86% |
Only the typical models are listed. If you need another models, please inform the power,Input and output voltage,then feel free to call us.
II. FEATURES
1 | High and low voltage input for option |
2 | Good heat dissipation with beautiful appearance |
3 | Natural cooling |
Condition: All specifications are tested under the room temperature 25 ℃, Normal input voltage and Pure Negative Normal Load
III. INPUT CHARACTERISTIC
Rated value(VDC) | Voltage Range(VDC) |
110VDC | 66-154VDC |
IV. OUTPUT CHARACTERISTIC
Parameter | Value |
Power | 250W |
Output Voltage | 48VDC |
Output Current | 5.2A |
Line Regulation | ±0.5% |
Load Regulation | ±0.5% |
Voltage Set-point Accuracy | ±2% |
Output Current Limiting | 120%(Typ) |
V. PROTECTIVE CHARACTERISTIC
1 | Input under voltage protection |
2 | Input over voltage protection |
3 | Over temperature protection |
4 | Output over current protection |
5 | Output short circuit protection |
GENERAL CHARACTERISTIC
Parameter | Value |
Switching Frequency | 100-200KHz |
lsolation Resitstance | 200MΩ |
lsolation Voltage
Parameter | Value |
Input-Output | >1500VDC |
Input-Case | >1050VDC |
Output-Case | >500VDC |
Environmental Characteristics
Parameter | Value | |
Case Temperature | Industry | -25 – +85℃ |
Military l | -40 – +85℃ | |
Storage Temperature | Industry | -45 – +105℃ |
Military | -55 – +105℃ | |
VI. MECHANICAL DRAWING AND PIN DEFINITION
Stable Isolated 48V Power for Railway Network & Communication Equipment
Modern railway vehicles increasingly rely on onboard Ethernet and communication networks for data transmission between monitoring, control and communication systems.
While the main railway power architecture may operate from a 110VDC battery bus, industrial Ethernet switches, communication gateways and other network electronics may require stable 48VDC power.
The MDB250-110S48 converts a wide 66–154VDC input into stable 48VDC output, creating a dedicated isolated power domain between the railway main power system and sensitive network equipment.
This is important because a nominal 110VDC railway bus does not always remain at exactly 110V. Battery conditions, charging and discharging, changing onboard loads and other operating conditions can cause the actual bus voltage to vary.
At the same time, Ethernet switches and communication gateways can be sensitive to short power disturbances. Even a temporary supply instability may result in equipment resets, communication interruptions or intermittent network failures.
The MDB250-110S48 is designed to provide a more reliable power path for these sensitive 48V loads.
Typical Power Architecture
110VDC Railway Battery / Power Bus
↓
66–154VDC Input
↓
MDB250-110S48 Isolated DC-DC Converter
↓
Stable 48VDC Power
↓
Industrial Ethernet Switch / Communication Gateway / Network Equipment
What Value Does MDB250-110S48 Create?
Using a dedicated isolated 48V power domain can help engineers:
Reduce network equipment resets caused by DC bus variations
Reduce power-related communication interruptions
Reduce interference between different electrical domains
Maintain stable power for sensitive network electronics
Support multiple 48V communication loads
Simplify 110VDC-to-48VDC power architecture
Reduce troubleshooting of intermittent network faults
Improve long-term onboard communication reliability
Reduce field maintenance and project risk
Why Choose MINGZINC?
MINGZINC develops industrial isolated DC-DC power solutions around actual equipment operating conditions rather than simply matching input voltage, output voltage and wattage.
For railway and onboard communication projects, our engineering approach considers:
Wide input voltage requirements
Galvanic isolation
EMI/EMC environment
Output stability under load changes
Vibration and mechanical reliability
Thermal management
Continuous operation
Electrical protection
Installation and interface requirements
For OEM/ODM projects, MINGZINC can customize input range, output voltage, power, interfaces, mounting structures and thermal solutions according to specific railway equipment requirements.
For Distributors & OEM Partners
For Power Supply Distributors, DC-DC Converter Suppliers, Railway Communication Equipment Suppliers, System Integrators and Railway Equipment OEMs, the MDB250-110S48 can complement existing railway power portfolios with an isolated 110VDC-to-48VDC power solution for network and communication equipment.
MINGZINC supports OEM Power Supply, ODM Power Supply and Custom Power Supply development for railway communication, onboard network and industrial electronics projects.
Need a customized 110VDC-to-48VDC isolated power solution for railway network equipment? Contact MINGZINC for technical specifications, sample evaluation and OEM/ODM support.