The Siemens SITAS 4AM4842-8DD40-0FA0 is a 500 VA single-phase control transformer with an 11-tap primary covering 208 V through 550 V — including the 525/500/480 V inputs commonly found in North American, marine, and export-oriented industrial equipment. Dual 2 × 115 V secondary windings can be series-wired for 230 V at 2.17 A or parallel-wired for 115 V at 4.35 A, providing installation flexibility across different control voltage standards.

Key Features

• 11-tap primary (208-550 V) covers a wide range of global single-phase mains voltages in one compact unit
• Dual secondary: series for 230 V or parallel for 115 V with doubled current capacity
• 2000 VA short-term capacity (4× nominal) handles high inrush from contactor coils and relay banks
• Low inrush current design simplifies primary-side protection coordination
• Compact EI 120/72 core: 122 × 121 × 134 mm footprint
• 50/60 Hz dual-frequency operation for global industrial power compatibility
• IP00 open-type construction for enclosed panel or cabinet mounting

Technical Data

Applications

This multi-tap transformer is designed for export-oriented machine builders and multi-standard production facilities where a single transformer SKU must cover diverse mains voltages from 208 V North American through 550 V industrial supplies. The dual secondary supports both 230 V and 115 V control standards from one unit, reducing inventory complexity. The compact EI 120/72 footprint fits standard control panel layouts while the 2000 VA S6 rating handles inrush from contactor coils and relay banks.