The 19in plug-in unit PCMDS19 150 from MTM Power is specially designed for applications in vehicle and railway technology. It is available with 150W output power and operates according to the push-pull principle; for example the input dc-voltage is chopped by two push-pull working transistors with a frequency of approximately 70kHz.

With the help of a transformer and a secondary linear choke, a galvanically isolated output voltage of 24VDC with 6.25A is produced, which is adjusted by pulse-width modulation according to the current mode principle.

The converter is available with a wide input range of 50,4VDC-154VDC for battery voltage of 110VDC acc. EN 50 155 and an isolation of 2.2kVAC. The dimensions are 164.5mm x 70.8mm x 128.4mm (length x wide x height).

The thermoselective vacuum encapsulation guarantees uniform heat dissipation within the module as well as excellent resistance against environmental influences such as shock, vibration and moisture.

Furthermore the converter is additionally cooled via the already mounted heat sink. The device needs no ground load and is short-circuit protected by primary and secondary power limiting.

The maintenance-free converter can be operate in parallel and is prepared for the use in devices with protection class II. It shows a mechanically and electrically rugged design using SMD technology and undergoes an automatic piece-by-piece test.