The Siemens SITAS 4AM4642-5MT10-0FA0 is a compact 400 VA single-phase control transformer that steps down 690 V primary to 230 V secondary — specifically designed for heavy industry, mining, and large-scale process plants where 690 V three-phase mains is the standard supply voltage. It delivers 1.74 A continuous with 1440 VA short-term capacity, reliably powering contactor coils, relays, and control electronics at the 230 V control level.

Key Features

• 690 V primary with ±5% taps (655/690/725 V) accommodates supply voltage variations in heavy industrial 690 V mains systems
• Screw/tab terminals provide robust connections compatible with standard industrial wiring practices
• 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 transformer is purpose-built for supplying 230 V control circuits in heavy industrial environments operating on 690 V mains — common in mining operations, steel mills, cement plants, large pump stations, and heavy process industries. The 690 V primary is derived from the phase-to-phase voltage of 400 V three-phase systems, making this the direct-control transformer choice for motor control centers and machine control panels in these demanding environments. The ±5% adjustable primary taps ensure stable 230 V output even with mains voltage fluctuations typical in heavy industrial power networks.