• Output Power: 302.4 W
• Output Voltage: 48 V DC
• Output Current: 6.3 A
• Input Voltage Range: 67.2 – 143 V DC (continuous) / 57.6 – 154 V DC (1 sec)
• Efficiency: 91 %
• Ripple & Noise: ≤ 180 mVp-p
• Inrush Current: max. 45 A @ 110 VDC
• No-load Power Consumption: Not specified (Semi-potted)
• Operating Temperature: −40 °C to +70 °C (derating above +55 °C)
• Cooling: Fanless natural convection
• Protection Functions: Short circuit, Overload, Over voltage, Over temperature, Input reverse polarity
• Overvoltage Category: OVC II
• Isolation Voltage: 4000 V DC between input and output
• Dimensions (L x W x H): 216 mm x 96.5 mm x 40 mm
• Weight: approx. 1190 g
• Safety & EMC Certificates: IEC 62368-1, UL 62368-1, EN 50155, EN 45545-2, EAC
• LED Indicator: Power On indicator (Green)
• Manufacturer Warranty: 3 years

Information about the MEAN WELL RSD-300D-48

The MEAN WELL RSD-300D-48 is a robust 300W DC-DC converter specifically engineered for railway applications, meeting the stringent requirements of EN 50155 and EN 45545-2. Its semi-encapsulated design provides superior protection against environmental stressors such as humidity, dust, and intense mechanical vibrations, making it a reliable power solution for rolling stock and demanding industrial automation. Featuring an ultra-slim 1U low profile of just 40mm, the unit is perfectly suited for space-constrained installations, while its fanless cooling system ensures silent operation and high MTBF by relying solely on natural air convection.

This model stands out with its wide 2:1 input voltage range, allowing it to maintain a stable 48V output even during significant DC line fluctuations common in transport systems. Enhanced safety is delivered through a high 4000VDC I/O isolation and a built-in constant current limiting circuit that automatically recovers after fault conditions are cleared. By incorporating 105°C long-life electrolytic capacitors, the RSD-300D-48 offers exceptional durability and thermal stability. This combination of high 91% efficiency and comprehensive protection features makes it an ideal choice for powering sensitive telecommunications and control equipment in railway and harsh industrial sectors.