The Siemens SITAS 4AM4042-5CT10 is a 250VA control transformer specifically configured for 440V primary supplies — the standard voltage for shipboard and offshore platform power distribution systems. It converts 440V to 230V at 1.09A, providing a standard auxiliary supply for control circuits, instrumentation, and single-phase equipment in marine and offshore applications.

Marine & Offshore Suitability

The 440V primary with taps at 418V, 440V, and 462V (±5%) matches the IEC 60092-101 standard voltage for low-voltage shipboard systems. While not marine-type-approved, the transformer is CE and cRUus certified and can be integrated into control panels that are part of a certified marine installation. Common applications include powering 230V control gear, lighting circuits, and service outlets on vessels and platforms.

Performance & Construction

Built on the EI 96/58 core at 89% efficiency, the 850VA short-time (S6) rating handles contactor and motor-starter inrush. The IP00 open-frame package (98×106×118mm) mounts via screws or 35mm DIN rail.

Certifications

Certified to EN 61558-2-2 and EN 61558-2-4 with CE, cRUus, and EAC approvals. Class B insulation for 40°C ambient.