The Siemens SITAS 4AT3612-5AT10-0FA0 is a 5000 VA (5 kVA) single-phase control transformer that steps down 400 V primary to 230 V secondary for industrial control circuit power. With 18.5 kVA short-term capacity and 21.7 A secondary current, it reliably supplies contactors, relays, solenoids, and control electronics in mid-to-large automation panels and motor control centers.

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
• Bolt-type terminals for secure high-current connections
• IP00 open-type construction for enclosed panel or cabinet mounting

Technical Data

Applications

This transformer is designed for supplying control circuits in mid-to-large industrial machinery, motor control centers, conveyor systems, and automation panels where a 5000 VA single-phase supply is required. The ±5% adjustable primary taps provide adaptability for installations with fluctuating mains voltage, while the low inrush characteristic enables streamlined fuseless panel design with SIRIUS 3RV circuit breakers for primary-side protection.