• Output Power: 300 W
• Output Voltage: 12 V DC
• Output Current: 25 A
• Input Voltage Range: 16.8 – 40 V DC
• Efficiency: 88 %
• Ripple & Noise: 120 mVp-p
• Input Current: 13.5 A @ 24 VDC
• No-load Power Consumption: < 1.5 W
• Operating Temperature: -40 °C to +70 °C
• Cooling: Free air 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 (H x W x D): 40 mm x 216 mm x 114 mm
• Weight: approx. 1000 g
• Safety & EMC Certificates: EN50155, IEC60571, EN45545-2, EAC, CE
• LED Indicator: Power On Indicator
• Manufacturer Warranty: 3 Years

Information about the MEAN WELL RSD-300B-12

The MEAN WELL RSD-300B-12 is a professional-grade 300W DC-DC converter specifically optimized for 24V nominal battery systems, common in railway rolling stock and industrial vehicle architectures. With its wide 2:1 input range of 16.8V to 40V DC, this converter provides a rock-solid 12V output even during significant voltage fluctuations at the source. One of its most impressive unique characteristics is the ultra-low profile 1U height of just 40mm, which allows for seamless integration into space-constrained environments and slimline server racks without sacrificing power density or thermal performance.

This unit is built to survive the most challenging environmental conditions, featuring a semi-potted design that shields internal components from dust, humidity, and mechanical vibrations up to 5G. It is fully compliant with the EN50155 railway standard and the EN45545-2 fire protection standard, making it a safe and reliable choice for public transport and heavy-duty industrial automation. The fanless architecture leverages natural air convection to achieve high reliability and a maintenance-free service life, while the 4000VDC reinforced isolation ensures that sensitive downstream electronics remain protected from primary bus transients and high-voltage surges.