The 4AM3442-5CT10 is a 100VA single-phase control transformer from the Siemens SITAS 4AM series, designed specifically for 440V supply environments where 230VAC control power is required. It delivers 0.43A continuous with 310VA S6 short-time capacity for inrush-heavy loads.

440V Applications

440V three-phase distribution is standard in marine and offshore electrical systems (IEC 60092), many North American heavy-industrial facilities, and regions where the legacy 440/460V network voltage persists. This transformer allows control circuits to run at 230VAC directly from the 440V bus without an intermediate step-down stage. The ±5% primary taps (418/440/462V) provide adjustment margin for site voltage variations.

Construction

The EI 84/42 laminated core delivers 86% efficiency with Class B insulation for 40°C ambient operation. IP00 open-style construction mounts via screws or 35mm DIN rail (EN 60715). Screw-type terminals accept ring or fork lugs. Certified to EN 61558-2-2 and EN 61558-2-6 safety isolating standards with CE, cRUus, and EAC approvals.

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