20W DC/DC in 1″ square package with “Hold Up” functionality

by | Mar 29, 2022 | P-Duke, Press release, Rail

The RCD20U is a EN50155 DC/DC converter series that provides high performance and high reliability for railway and industrial applications. It comes in a compact 1″x1″ industrial standard package and delivers up to 20W output power. These converters feature an 8:1 or 12:1 ultra-wide input voltage range of 9-75VDC and 14-160VDC which simplify the design of the power stage of a system. Using just one DC/DC model converter for different supply voltages (24, 28, 36, 48, 72, 96, 110VDC) in different regions avoids multiple input voltage models in the warehouse.

The patented enhanced Hold-Up Function is designed to simplify the design of supply interruption and changeover as per EN 50155. Generally, to keep the device functioning during the supply voltage interruption or changeover, capacitors are required to be installed at the input terminals. The capacitance and rated voltage of the capacitors vary according to the supply voltage in use. The BUS pin of RCD20U provides a stable and fixed charging voltage which allows the usage of just one Hold-Up capacitor for any input voltages and in addition, reduces the in-rush current at the start-up phase.


This series includes single output and dual output models with 5, 5.1, 12, 24, ±12, ±15VDC. It has various self-protection functions such as: over-current protection, output short-circuit protection, output over-voltage protection, adjustable input under-voltage lockout and over-temperature protection. By installing a heatsink on the module these converters achieve the operating temperature class OT4 and the extended operating temperatures ST1, as per EN 50155 standards.

This series is certified according to IEC/EN/UL 62368-1, EN 50155 and EN 45545-2 standards (pending). Additionally, shock and vibration levels are compliant with EN 61373 and MIL-STD-810F. With an operating altitude of up to 5000 meters, a wide operating ambient temperature of -40°C to +105°C and a 12:1 input voltage range, makes these converters entirely suitable for any ruggedized, high-reliability applications such as rolling stocks and transportation in harsh industrial environments.


  • 20W Output Power in a 1″x1″ Industrial Standard Package
  • 8:1 & 12:1 Input Voltage Range from 9-75V and 14-160V
  •  Patented Enhanced Hold-up Function for Supply Interruption and Changeover
  • Adjustable UVLO
  • Operating Temperature: -40°C to +105°C
  • 3000VDC Input-Output Isolation
  • Operating Altitude: up to 5000m
  • Approved to EN 50155 | EN 45545-2 | IEC/EN/UL 62368-1 Standards
  • 3-Year Product Warranty

Samples are available now. Our product specialists are on hand to assist with product selection and guide you through the design cycle. We offer technical and commercial support.

Please contact us to arrange samples for evaluation or for more information

Model Information

Model NoInput RangeOutput Range
RCD20-36S05U9 ~ 75 VDC5 VDC / 4000 mA
RCD20-36S5P1U9 ~ 75 VDC5.1 VDC / 4000 mA
RCD20-36S12U9 ~ 75 VDC12 VDC / 1670 mA
RCD20-36S15U9 ~ 75 VDC15 VDC / 1330 mA
RCD20-36S24U9 ~ 75 VDC24 VDC / 835 mA
RCD20-36D12U9 ~ 75 VDC±12 VDC / ±833 mA
RCD20-36D15U9 ~ 75 VDC±15 VDC / ±667 mA
RCD20-72S05U14 ~ 160 VDC5 VDC / 4000 mA
RCD20-72S5P1U14 ~ 160 VDC5.1 VDC / 4000 mA
RCD20-72S12U14 ~ 160 VDC12 VDC / 1670 mA
RCD20-72S15U14 ~ 160 VDC15 VDC / 1330 mA
RCD20-72S24U14 ~ 160 VDC24 VDC / 835 mA
RCD20-72D12U14 ~ 160 VDC±12 VDC / ±833 mA
RCD20-72D15U14 ~ 160 VDC±15 VDC / ±667 mA

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