New Industry Products

RECOM Introduces Three 150-Watt, Eighth Brick DC-DC Converters

July 20, 2021 by Gary Elinoff

The units offer 6:1 input ranges of 9 to 60 VDC and provide trimmable outputs centered at either 12, 24 or 48 VDC.

The RPA150E series from RECOM feature isolated outputs adjustable over a +/-20% range. This enables the 24 VDC device to service 28 VDC avionic systems and the 48 VDC unit to supply the 57 VDC needed for power over internet (POE) applications.

The RPA150E series. Image courtesy of RECOM

The versatility of the units is also displayed on the input side, where the 6:1 input range of the three RPA150E series members allows them to draw power off today’s omnipresent 12, 24, or 48 VDC mains. Because the series members can accept inputs as low as 9 VDC, they can also cope with voltage dips that 12-volt batteries may experience during cranking. Similarly, the capacity to accept inputs as high as 60 VDC means that the converters can work with 48-volt batteries even as they experience voltage peaks during charging.

As stated by Matthew Dauterive, DC/DC product manager of RECOM, “The wide input range of our RPA150E series means it can provide cost-effective power conversion from battery voltages in EVs, rail, and E-mobility designs as well as in a broad range of industrial applications”.


The Three Units

All three encapsulated DC-DC converters feature industry-standard pin-out for easy design-in. All accept inputs from 9 to 60 VDC. The maximum input current, measured at a full load with a 9 VDC input voltage, is 17.5 amps.

  Untrimmed Output Voltage Maximum Output Current Typical efficiency Maximum Capacitance Load
RPA150E-4812SEW/P 12 VDC 13 amps 91% 5200 µF
RPA150E-4824SEW/P 24 VDC 6 amps 92% 2400 µF
RPA150E-4848SEW/P 48 VDC 3 amps 91% 1200 µF

Efficiency is measured at 25℃ with an input voltage of 24 VDC


Output Power Derating

The output power of 150 watts is only possible with inputs of 18 to 60 VDC. Below that point, the maximum output derates to 120 watts.


Output Voltage Trimming

Output voltage trimming is achieved through the use of external trimming resistors. Instructions on how to choose resistor values for each of the three converters are provided by the datasheet.


Electrical Specifications

Quiescent Current at 24 VDC input for 12V, 24V and 48V devices are 300mA, 160mA and 220mA, respectively. The units need no minimum load to properly function.

Output ripple and noise, measured at a 20 MHz bandwidth at a 24 VDC input voltage are 85, 230, and 200 millivolts peak-to-peak for the 12, 24, and 48 VDC units, respectively.

Switching Frequency ranges from 290 to 380 kHz

Standby current is a maximum of 3mA


Physical Considerations

  • Members of the series operate over a temperature range of -40 to +85℃. Derating begins at +45℃, and the effect of the derating can be ameliorated by airflows above 0.1 m/s.
  • The units are available in eighth brick, 58.4 x 22.9 x 13.5mm packages
  • Typical weight is 50.5 grams



  • UL 62368-1
  • CAN/CSA-C22 No. 62368-1


EMC Compliance

With an external filter network

  • EN 55032 
  • EN 55011 
  • EN 50121-3-2 railway EMC standard


Railway Functional and Safety Standards

  • EN 50155
  • EN 45545-2 


Environmental Standards

  • Reach
  • RoHS