The Siemens SITAS 4AM4042-5MT10 is engineered specifically for 690 V AC mains — the dominant three-phase-to-single-phase line voltage in mining operations, offshore platforms, steel mills, and heavy process industries. Its ±5% adjustable primary taps (655 V, 690 V, 725 V) handle the wide voltage swings typical of remote or generator-backed installations, while the 230 V secondary reliably powers control circuits, protection relays, and automation devices. The 850 VA short-time rating ensures stable performance during contactor pull-in and motor-start surges.

Key Features

• 690 V ±5% primary — purpose-built for mining and heavy industry mains
• Three selectable primary taps for voltage fluctuation compensation
• 850 VA short-time peak power for demanding inrush loads
• 89% efficiency, 50/60 Hz operation
• IP00 open-frame — DIN rail or screw mounting in control cabinets
• UL/CSA recognized for international project compliance

Technical Data

Applications

Designed for control panels in 690 V environments: mining conveyor controls, offshore drilling auxiliaries, steel mill motor control centers, cement plant automation, and any installation where 690 V is the distributed single-phase voltage. The 230 V output directly feeds standard industrial control devices.