Autotransformers are matching transformers without galvanic isolation. A portion of the winding is jointly used by both the input and output side.[details]

Adjustment range

The adjustment range commonly is the guaranteed output voltage trim range. This enables compensation of voltage drops on long supply lines.[details]


AWG (American Wire Gauge) specifies the diameter of the wire and the cross section of wires. The AWG system is mainly used in North America.

Auto select input

1-phase power supplies with an auto-select or auto-range input detect the input voltage and automatically select the correct input voltage range.[details]


ATEX (French: “Atmosphère Explosible”) [details]


AS-Interface® (actuator-sensor interface) is a bus system in which energy and data are transmitted on a common two-wire line. One identifying feature of the bus system is the yellow profiled cable. ...[details]

AP devices

AP devices are PULS power supplies and DC/DC converters using 19-inch technology.

Ambient temperature

The ambient temperature is defined as the air inlet temperature 2cm below the device. PULS differentiate between the working temperature and the storage and transport temperature.