The Siemens SITAS 4AM4042-4TT10-0FC0 is a 225VA 1:1 isolation transformer housed in an IP23-rated enclosed casing measuring 244×245×230mm. It provides galvanic separation between a 230V primary and 230V secondary at 0.98A, with protection against dust ingress and water spray — making it suitable for exposed mounting locations where open-frame IP00 units are not permitted.

Enclosure & Installation

The IP23 enclosure protects against solid objects ≥12.5mm and water spray at up to 60° from vertical, allowing installation outside sealed cabinets in many industrial environments. Screw-mounted at 7.4kg, it connects via screw-type and flat tab terminals. The EI 96/58 core delivers 89% efficiency.

Isolation Performance

The II0 vector group provides fundamental galvanic isolation per EN 61558-2-4, breaking ground loops and suppressing line-conducted noise. The 850VA short-time (S6) rating handles momentary inrush from connected loads. Primary taps at 218V, 230V, and 242V accommodate site voltage variation.

Certifications

Certified to EN 61558-2-1, EN 61558-2-2, and EN 61558-2-4 with CE, cRUus (UL/CSA recognized), and EAC approvals. Class B insulation rated for 40°C ambient operation.