The Siemens SITAS 4AM2342-4TT10 is the entry-level model in the SITAS transformer range — a 25 VA single-phase isolating transformer providing 1:1 galvanic isolation between a 230 V supply and a 230 V load. Its ±5% primary voltage taps (218 V, 230 V, 242 V) compensate for supply fluctuations without affecting the secondary side. At just 78 × 62 × 79 mm and 0.82 kg, it occupies minimal DIN rail or panel space, making it ideal for isolating individual sensitive instruments or control devices where a dedicated floating supply is needed. The EI 60/20 iron core and 74% efficiency reflect its compact, low-power design optimized for light continuous loads.

Key Features

• 1:1 galvanic isolation — 230 V in, 230 V out with full separation
• ±5% primary taps (218/230/242 V) for supply voltage adjustment
• Ultra-compact: 78 × 62 × 79 mm, 0.82 kg — smallest SITAS model
• 50/60 Hz operation, IP00 open-frame
• Screw/tab terminals, screws or DIN rail mounting
• UL/CSA recognized for global compliance

Technical Data

Applications

Individual instrument isolation in control panels: isolating a single sensitive measurement device, floating power for communication gateways, separating analog sensor circuits from mains-borne noise, and providing dedicated isolation for small PLC or HMI power inputs in compact control enclosures.