The Siemens SITAS 4AM5242-5AN00-0EA0 is a 630 VA single-phase safety isolating transformer that steps down 400 V primary to 24 V secondary for low-voltage control circuits. Delivering 26.3 A continuous with 2350 VA short-term capacity, it reliably powers 24 V PLC systems, sensors, actuators, and control electronics in industrial automation panels requiring SELV/PELV safety isolation from 400 V mains.

Key Features

• 24 V secondary at 26.3 A supplies high-current low-voltage control circuits with safe galvanic isolation from 400 V mains
• Adjustable primary taps at 380/400/420 V (±5%) accommodate supply voltage variations
• 2350 VA short-term capacity (3.7× nominal) handles inrush from DC power supply charging and contactor coils
• Safety isolating transformer per EN 61558-2-6 — suitable for SELV/PELV circuits
• Low inrush current design simplifies primary-side protection coordination
• Compact EI 150/48 core: 152 × 144 × 110 mm footprint
• 50/60 Hz dual-frequency operation for global industrial power compatibility
• IP00 open-type construction for enclosed panel or cabinet mounting

Technical Data

Applications

This safety transformer is purpose-built for supplying 24 V SELV/PELV control circuits in industrial machinery and automation panels operating on 400 V 3-phase mains — the most common European industrial supply. The 24 V output powers PLC systems, sensor networks, safety relays, and industrial IoT devices with full galvanic isolation. The 26.3 A continuous rating supports installations with numerous 24 V loads, while the ±5% primary taps ensure stable 24 V output even with mains voltage fluctuations typical in industrial environments.