The Siemens SITAS 4AT3032-5AT10-0FA0 is a 4000 VA (4 kVA) single-phase control transformer that steps down 400 V primary to 230 V secondary for industrial control circuit power. With 16 kVA short-term capacity and 95% efficiency, it reliably supplies contactors, relays, solenoids, and control electronics in automation panels and machinery.

Key Features

• Adjustable primary voltage taps at 380/400/420 V (±5%) compensate for supply voltage fluctuations without transformer replacement
• Low inrush current design enables fuseless protection when paired with SIRIUS 3RV motor starter protectors
• H-class insulation (55 °C ambient) supports operation in higher-temperature panel environments
• 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 transformer is suitable for supplying control circuits in industrial machinery, motor control centers, conveyor systems, and packaging equipment where reliable galvanic isolation between mains and 230 V control voltage is required. The ±5% adjustable primary taps make it particularly adaptable for installations with fluctuating supply voltages, while H-class insulation ensures dependable performance in high-ambient-temperature enclosures.