The Siemens SITAS 4AM3842-8DD40 is a 160VA control transformer with an 11-tap primary spanning 208V to 550V AC, paired with dual 115V secondary windings that can be wired in series for 230V or in parallel for 115V at double the current. This wide primary voltage coverage makes it a universal solution for control panel builders serving multiple markets — one transformer model adapts to American 208V, European 400V, marine 440V, mining 500V, and Canadian 550V/600V supplies without stocking separate voltage variants.

11-Tap Universal Primary: 208V to 550V

The primary terminal block provides eleven clearly marked tap points: 550V, 525V, 500V, 480V, 460V, 440V, 415V, 400V, 380V, 230V, and 208V. This covers the full spectrum of global industrial single-phase and line-to-line voltages, from North American 208V through European 400V to Canadian mining 550V. Panel builders can standardize on one transformer part number while serving customers across different voltage regions — simplifying procurement, inventory, and panel documentation.

Flexible Dual 115V Secondary

The two independent 115V secondary windings, each rated at 0.7A, can be connected in series for a 230V output at 0.7A or in parallel for a 115V output at 1.4A. This dual-voltage capability means the same control panel can be configured for either 230V or 115V control circuit conventions simply by changing secondary wiring — no transformer replacement needed. The 490VA S6 short-time rating supports the combined inrush of contactor coils and power supply input stages during panel power-up.