The Siemens SITAS 4AM4642-8ED40-0FA0 is a compact 400 VA single-phase control transformer with an exceptionally wide 12-tap primary covering 230 V through 600 V — including the 575/550/525 V inputs commonly found in North American and export-oriented industrial equipment. Dual 2 × 115 V secondary windings can be series-wired for 230 V at 1.74 A or parallel-wired for 115 V at 3.5 A, providing installation flexibility across different control voltage standards.

Key Features

• 12-tap primary (230-600 V) covers virtually all global single-phase mains voltages in one unit
• Dual secondary: series for 230 V or parallel for 115 V with doubled current capacity
• Low inrush current design simplifies primary-side protection coordination
• Compact EI 120/52 core: 122 × 121 × 114 mm fits tight panel spaces
• 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 purpose-built for export-oriented machine builders and multi-standard production facilities where a single transformer SKU must cover diverse mains voltages worldwide — from 230 V European single-phase through 575 V North American industrial supplies. The dual secondary supports both 230 V and 115 V control standards from one unit, reducing inventory complexity. The compact EI-core footprint fits space-constrained control panels while the 1440 VA short-term rating handles inrush from contactor coils and relay banks.