The Siemens SITAS 4AM4642-5CT10-0FA0 is a compact 400 VA single-phase control transformer that steps down 440 V primary to 230 V secondary for small industrial control circuits. Designed for installations where 440 V mains supply is standard, it delivers 1.74 A continuous with 1440 VA short-term capacity — reliably powering contactor coils, relays, timers, and PLC power supplies in automation panels.

Key Features

• 440 V primary with ±5% taps (418/440/462 V) accommodates supply voltage variations in 440 V mains systems
• Screw/tab terminals provide robust, maintenance-friendly connections compatible with standard ring and fork lugs
• Low inrush current design simplifies primary-side protection coordination
• Compact EI 120/52 core construction: 122 × 121 × 114 mm footprint 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 compact transformer is designed for supplying control circuits in industrial machinery, control panels, HVAC systems, and building automation operating on 440 V mains — common in marine, offshore, and certain regional industrial power systems. The ±5% adjustable primary taps provide adaptability for installations with fluctuating supply voltage, while the compact EI-core footprint fits DIN rail and panel layouts with limited space.