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DC/DC Converter AER20-W for Automotive, Transport & Railway

  • AER20-W


  • Galvanically isolated
  • Reinforced insulation
  • Wide input range (18:1)
  • Single output (5 V, 12 V, 15 V) or dual output ±12 V, ±15 V, ±24 V
  • Power: 20 W
  • PCB mounting
  • Quarter brick (50.8 mm x 25.4 mm x 10.2 mm)
  • Overtemperature shutdown
  • Overcurrent protection
  • Short-circuit protection
  • Switching frequency (200 kHz)
  • Ambient temperature: -40 °C to + 85 °C
  • Railway standard EN 50155 and 50121-3-2 with external components

Reach√ RoHs√ Material conflict-free√

DC/DC converters AER20-W and AER20-DW - compact 20 W power supply for harsh applications and the railway with an input range of 18:1!

AER20-W - Output Power 20 Watt for railway

The bricks of the AER20-W series from AUTRONIC are a series of galvanically isolated DC-DC converters in a sealed housing. The 2"x1" bricks have been specially de-signed as reliable solutions for applications such as railway systems, battery powered equipment, measuring instruments, displays and many other applications with harsh requirements.

Absolutely unique is the input range from 8.5 V up to 160 V in a single device. This allows the nominal input range of 12 V to 110 V including tolerances (-30 % and + 45 %) to be covered with only one device and facilitates the design-in of the power supply.

The high efficiency of up to 90 % simplifies use in thermally critical applications, and the EMC according to EN 50155 is fulfilled with standard externally components. The DC/DC converters are optionally available with a heat sink, thus ensuring even better heat dissipation for higher thermal requirements. The small power supplies are designed for use in the temperature range from -40 °C to 85 °C (case up to 105 °C) and thus meet the requirements of class OT4 ST1. With natural convection, the converter can be operated up to 67 °C without derating.

The voltage converters have many protective functions integrated, such as protection against over-current, overvoltage and the DC/DC converters are also short-circuit-proof and have a low no-load current consumption. The power supply can be controlled via remote ON/OFF. Further features are a high I/O isolation with 3000 Vac with reinforced isolation.

The AER-20W meets the environmental requirements of shock/vibration according to EN 61373 category 1 class B, dry and wet heat according to EN 60068-2-1, 2, 30 and the EMC standard EN 50121-3-2 for rail vehicles (with external filtering components), as well as the railway standard EN 50155. Fire tests according to EN45545-2 have been performed successfully.

Versions for the nominal railway voltages of 24 V to 110 V are available. In addition, the converter can be used for 12 V applications, as the converter can be operated up to 8.5 V permanently. The converters have an accurate output voltage regulation of <1 %. For the version with dual output the voltage balance is ± 1.0 %.

The single output versions are available with voltages of 5 V, 12 V and 15 V. Versions with dual output are also available, with output voltages of ±12 V, ±15 V and ±24 V. The output voltages of the single output version can be trimmed with -20 % and +15 %.


min. - max.
Vout1/VIout1/mATypeOrder number
8,5 - 16054000AER20-W11751220511
8,5 - 160121670AER20-W11751221213
8,5 - 160151330AER20-W11751221513
8,5 - 160±12±833AER20-DW11751221227
8,5 - 160±15±667AER20-DW11751221527
8,5 - 160±24±417AER20-DW11751222426

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