• Output Power: 300 W
• Output Voltage: 5 V DC
• Output Current: 60 A
• Input Voltage Range: 67.2 – 143 V DC (continuous) / 57.6 – 154 V DC (1 sec)
• Efficiency: 90 %
• Ripple & Noise: ≤ 100 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-5

The MEAN WELL RSD-300D-5 is a high-performance 300W DC-DC converter engineered to meet the rigorous railway standards, specifically EN 50155 and EN 45545-2. Its ruggedized construction features a half-encapsulated design, providing superior resistance against environmental factors such as humidity, dust, and intense vibrations. This makes it an ideal choice for rolling stock and harsh industrial environments where mechanical stability is paramount. The ultra-low 1U profile of only 40mm ensures that this unit fits seamlessly into space-constrained installations without sacrificing performance.

Equipped with a wide 2:1 input voltage range, the RSD-300D-5 offers exceptional transient ability, effectively handling voltage fluctuations common in railway electrical systems. The device prioritizes safety with a high 4000VDC I/O isolation and a built-in constant current limiting circuit that protects against electrical faults. By utilizing 105°C long-life electrolytic capacitors and relying on fanless free air convection for cooling, the unit achieves high reliability and a long service life. This combination of features ensures stable 5V power delivery for critical sensors and control units, maximizing system uptime and reducing maintenance costs.