The Siemens SITAS 4AM4842-8DN00-0EA0 is a 500 VA single-phase safety isolating transformer with an 11-tap primary covering 208 V through 550 V and a 24 V secondary output. Delivering 20.8 A continuous with 2000 VA short-term capacity, it reliably powers 24 V PLC systems, sensors, actuators, and control electronics — with the added flexibility of adapting to virtually any global mains voltage through its multi-tap primary.

Key Features

• 11-tap primary (208-550 V) plus 24 V secondary — one transformer for worldwide 24 V control circuits
• 20.8 A at 24 V supplies high-current low-voltage control circuits with safe galvanic isolation
• 2000 VA short-term capacity (4× 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 120/72 core: 122 × 121 × 134 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 multi-tap safety transformer is purpose-built for supplying 24 V SELV/PELV control circuits in export-oriented machinery and multi-standard production facilities. The 11-tap primary ensures one transformer SKU covers mains voltages from 208 V North American through 550 V industrial supplies, while the 24 V secondary powers PLC systems, sensor networks, safety relays, and industrial IoT devices with full galvanic isolation. The 20.8 A rating supports installations with numerous 24 V loads across diverse global power environments.