Avel Lindberg AT D4022 Transformer

The Avel Lindberg D4022 is a 100 VA toroidal power transformer with dual 18 V secondary windings, designed for compact, efficient power-supply builds. As part of Avel's D4000 Standard Range toroidal lineup, this unit delivers two isolated 18 VAC windings in a compact package, and it uses dual primary windings to support 50/60 Hz mains with the primaries connectable in series or parallel to match 115/230 V. The secondary voltage tolerance is within 3% at normal input and full load, providing stable rails for sensitive electronics. Mounting is via a metal dish with two foam pads, and the hardware (bolts, washers, and nuts) is included. Physical dimensions list roughly 2.78 inches (≈91 mm) in diameter and about 1.8 inches (≈45 mm) in height, with a body mass around 4.5 kg, making it a sturdy yet compact choice for power-supply projects requiring dual 18 VAC rails.