Home > Products > Details


DC/DC converter AER20, compact 20W power supply for the railway.

  • AER20


  • Industrial standard 2" x 1" package
  • Wide input range 9 V to 36 V, 18 V to 75 V, 40 V to 160 V
  • I/O Isolation 3000 VAC with reinforced insulation
  • Ambient operating temperature -40 °C to +88 °C
  • No min. load requirement
  • Overload/-voltage and short circuit protection
  • Remote On/Off, output voltage trim
  • Designed-in conducted EMI meets EN 55032 Class A & FCC Level A
  • Vibration and shock according EN 61373
  • Cooling, dry & damp heat test according IEC/EN 60068-2-1, 2, 30
  • Fire and smoke according EN 45545-2
  • Railway EMC standard according EN 50121-3-2
  • Railway certified according EN 50155 (IEC60571)
  • UL/cUL/IEC/EN 62368-1 (60950-1) safety approval & CE marking 

Reach√ RoHs√ Material conflict-free√

AUTRONIC's new AER20 series are electrically isolated DC-DC converters with 20 W power in an encapsulated housing.

AER20 - Output Power 20 Watt for railway

The 2"x1" bricks have been developed specifically for reliable solutions in applications like railway systems, battery powered devices, gauges and many other rough applications.
The high degree of efficiency of up to 88 % facilitates the design-in, the EMC according to EN 50155 is met with low external components. Optionally, the AER20 is available with heat sink, so higher heat dissipation can be guaranteed even at higher thermal requirements. The small power supplies have been designed for use at a temperature range between -40 °C and 85 °C and thus meet the requirements for class OT4 ST1. The modules are available with two different pinnings but without any functional differences.
The AER20 power supplies have many integrated protection features. Protection against overcurrent and over- voltage is guaranteed, in addition, the DC/DC converters are short circuit proof. The AER20 can be controlled via remote ON/OFF, output balancing and EMI filters are compliant with EN 55032 & FCC Part 15 Class A. Other features are a high I/O isolation (3000 VAC) and a reinforced insulation.
The AER20 series meets the environmental requirements of shock/vibration according to EN 61373 category 1 class B, dry and damp heat according to EN 60068-2-1, 2, 30 and the EMC standard EN 50121-3-2 for rail vehicles, as well as the railway standard EN 50155. Fire and Smoke tests according to EN45545-2 have been performed.

A total of 18 models are available for nominal input voltages of 12/24 V, 36/48 V or 72/110 V and all converters provide an accurate output voltage of <1 %.
The single output versions are available with voltages of 5 V, 12 V, 15 V and 24 V. Furthermore, versions with dual output are available with output voltages of ± 12 V and ± 15 V. All DC/DC converters can be trimmed +/- 10 %.


min. - max.
Vout1/VIout1/mAVout2/VIout2/mATypeOrder number
Single Output      
9 - 3654000  AER20-24S0511751122113
9 - 36121670  AER20-24S1211751122216
9 - 36151330  AER20-24S1511751122319
9 - 3624833  AER20-24S2411751122413
18 - 7554000  AER20-48S0511751125119
18 - 75121670  AER20-48S1211751125213
18 - 75151330  AER20-48S1511751125316
18 - 7524833  AER20-48S2411751125419
40 - 16054000  AER20-110S0511751127114
40 - 160121670  AER20-110S1211751127217
40 - 160151330  AER20-110S1511751127311
40 - 16024833  AER20-110S2411751127414
Dual Output      
9 - 36+12833-12833AER20-24D1211751122221
9 - 36+15667-15667AER20-24D1511751122324
18 - 75+12833-12833AER10-48D1211751125227
18 - 75+15667-15667AER20-48D1511751125321
40 - 160+12833-12833AER20-110D1211751127222
40 - 160+15667-15667AER20-110D1511751127325

For partnumber A-Pinning & Heatsink see datasheet

Related articles



The Autronic AER03 series is a new series of railway-approved and isolated 3 W DC/DC converters in potted DIP24 package. The brick solutions have been designed specifically for railway applications.


AUTRONIC's new AER10 series are electrically isolated DC-DC converters with 10 W power in an encapsulated housing.


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!


The Autronic AER50 series is a brand-new generation of high performance, convection cooled 50 W DC/DC converters.


The Autronic AER50-W series is a generation of high performance, convection cooled 50 W DC/DC converters with ultra wide input range.


The Autronic AER75 series is a series of high performance, convection cooled 75 W DC/DC converters.
Fortec Power