MEAN WELL DDRH & RSDH High-Voltage DC-DC Converters
DDRH vs. RSDH Series
Both series utilize high-voltage input architectures designed to provide stable low-voltage auxiliary power from high-voltage DC bus systems. The key differences lie in their mechanical integration:
- DDRH Series (DIN Rail): Optimized for control cabinet installation. It easily snaps onto TS-35/7.5 or 15 rails, making it ideal for distributed industrial automation and energy storage setups.
- RSDH Series (Chassis Mount): Optimized for direct mounting to machine frames, panels, or within protective enclosures. It features a low-profile 1U form factor for systems where DIN rail space is unavailable.
Shared Technical Specifications
| Parameter | Specification Detail |
|---|---|
| Ultra-Wide Input | 150 ~ 1500VDC or 250 ~ 1500VDC (Model dependent) |
| Surge Handling | Withstand 1700VDC surge for 10 seconds |
| Isolation | 4KVAC Reinforced I/O Isolation |
| Operating Temp. | -40°C to +80°C (Fanless/Conduction cooling) |
| Safety Standards | IEC 62109-1 (PV Standard), OVC III Compliance |
Series Power Range Overview
| Series | Mounting | Wattage Classes | Output Voltages |
|---|---|---|---|
| DDRH | DIN Rail | 30W, 45W, 60W | 12V, 24V, 48V |
| RSDH | Chassis Mount | 150W, 300W | 12V, 24V, 32V, 48V |
Scalability: These converters are ideal for auxiliary power, providing a stable low-voltage output to power controllers, sensors, and communication devices directly from high-voltage DC lines.
Application & Design Benefits
| Industry | Key Application |
|---|---|
| Photovoltaic (PV) | Powering string inverters and monitoring gateways directly from the DC string. |
| Energy Storage (ESS) | Powering Battery Management Systems (BMS) from high-voltage battery stacks. |
| Industrial DC Bus | Auxiliary power for PLC/HMI in high-voltage microgrids or factory floors. |
| Charging Piles | Stable auxiliary power for charging station control logic. |
Design Note: Both series feature a half-encapsulated design to improve thermal performance in harsh environments while maintaining robust mechanical durability. Ensure proper derating is observed if the ambient temperature exceeds 55°C.
