In modern power distribution networks, automation equipment such as RTUs, FTUs, and smart meters depend on stable DC power to function correctly. When the power supply fails, the entire distribution monitoring and control chain collapses:
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Feeder terminal units (FTUs) lose communication with the control center
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Remote monitoring of power quality becomes impossible
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Automated fault isolation and service restoration fails
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Load balancing and demand response systems go offline
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Field maintenance costs surge due to undetected faults
Outdoor power distribution cabinets face relentless environmental stress: temperature cycling from -40°C to +70°C, high humidity, lightning-induced surges, and persistent electromagnetic interference from adjacent power lines. A power converter that cannot survive these conditions becomes the weakest link in the entire distribution network.
The MDN4000-360S48 is a high-power isolated DC-DC converter designed to deliver reliable 48V power from ultra-high voltage DC sources in power distribution and automation applications.
Key Specifications:
| Parameter |
Value |
| Input Voltage |
360VDC (Range: 280–500VDC) |
| Output Voltage |
48VDC |
| Output Current |
83.3A |
| Output Power |
4000W |
| Efficiency |
93% |
| Isolation |
Input-output dual electrical isolation |
| Communication |
CAN bus |
| Cooling |
Fan cooling + internal thermal potting |
| Protection Rating |
IP65 |
| Dimensions |
301 × 261 × 124mm |
Multiple ultra-high voltage input ranges available:
| Option |
Input Voltage Range |
| Standard |
280–500VDC |
| Extended Range 1 |
350–750VDC |
| Extended Range 2 |
400–850VDC |
| Extended Range 3 |
600–1100VDC |
| Extended Range 4 |
900–1500VDC |
Power options from 3000W to 6000W with single output support. Custom configurations available.
The sealed aluminum housing with full internal potting delivers outstanding performance against:
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Moisture ingress and condensation
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Dust and pollution accumulation
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Vibration from wind and traffic
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Electromagnetic interference from power lines
Power distribution equipment operates from pole-mounted cabinets, underground vaults, and remote substations — all demanding compact, rugged, and highly reliable power conversion.
Ultra-wide input range (280–500VDC) — accommodates the varying DC bus voltages found across distribution network nodes, with options extending to 1500VDC for high-voltage distribution applications.
Surge and spike suppression — effectively clamps lightning-induced surges and switching transients that are common in overhead distribution networks, protecting downstream communication and monitoring equipment.
Dual electrical isolation — ensures personnel safety and equipment protection by isolating the high-voltage input from the 48V output, a mandatory requirement for power utility applications.
IP65 + full potting — long-life design — the combination of waterproof sealing and internal potting extends operational lifespan in harsh outdoor environments, reducing maintenance frequency and total cost of ownership.
Built-in protections:
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Input undervoltage protection
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Input overvoltage protection
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Overtemperature protection
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Output overcurrent protection
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Short-circuit protection
These protections ensure continuous operation of critical distribution automation equipment, preventing communication blackouts and enabling rapid fault detection and isolation.
For power distribution automation, stable and reliable DC power conversion is the foundation that enables real-time monitoring, fault detection, and automated service restoration.
The MDN4000-360S48 combines 4000W high power output, ultra-high voltage input with five range options, dual electrical isolation, IP65 weatherproof protection, 93% high efficiency, and long-life design into a compact DC-DC converter engineered for the unforgiving conditions of power distribution networks.
For more details, custom configurations, or to request a sample, contact our engineering team.
