Siemens SIDAC-T 4AU4397-0MD20-3DA0 18kVA Isolation Transformer 400/480V 400V

The Siemens 4AU4397-0MD20-3DA0 is a high-performance three-phase isolation transformer designed for industrial power systems requiring electrical separation between circuits for safety, noise reduction, or voltage matching. With a power rating of 18 kVA, this transformer efficiently handles medium-load applications in automation, control systems, and power distribution environments.
It features a DYN5 vector group configuration, offering effective galvanic isolation and phase shift control between primary and secondary windings. Operating with a primary voltage of 480 V and a secondary output of 400 V, the transformer delivers stable and reliable power with reduced harmonic interference.
Engineered for durability and compliance, the unit is constructed to IEC/EN 61558-2-4 standards and is rated for operation under Class H insulation with a 55°C temperature rise. Its open-core design (IP00 protection) makes it ideal for installation within enclosed electrical panels

Weight: 310 lbs
Dimensions: 22 × 16 × 21 in