The Siemens SITAS 4AT3932-8DD40-0FA0 is a 10000 VA (10 kVA) single-phase control transformer — the largest in the SITAS 4AT single-phase range. Its 11-tap primary spans 208 V to 550 V, covering the 525/500/480 V inputs along with 440/415/400/380/230/208 V, making it adaptable to virtually any global industrial mains voltage. The dual 2 × 115 V secondary can be series-wired for 230 V at 43.5 A or parallel-wired for 115 V at 87 A.

Key Features

• Industry-leading 11-tap primary (208-550 V) eliminates the need for voltage-specific transformer stocking — one unit covers global installations
• Dual secondary windings: series for 230 V at 43.5 A or parallel for 115 V at 87 A, doubling current capacity for low-voltage control circuits
• 30 kVA short-term capacity handles extreme inrush loads from large contactor banks and solenoid arrays
• Low inrush current design enables fuseless protection when paired with SIRIUS 3RV motor starter protectors
• H-class insulation (55 °C ambient) for reliable operation in demanding thermal environments
• 50/60 Hz dual-frequency operation for global industrial power compatibility
• Successor model replacing multiple voltage-specific variants, simplifying BOM standardization

Technical Data

Applications

This transformer is designed for large-scale industrial control circuit supply in motor control centers, automation panels, conveyor systems, and process machinery. The 11-tap primary makes it the go-to choice for export-oriented machine builders and multi-standard production facilities where a single transformer SKU must cover diverse mains voltages worldwide. The 30 kVA S6 rating handles substantial inrush currents from large contactor and solenoid loads, while the dual secondary configuration supports both 230 V and 115 V control standards from one unit.