When a control cabinet has to supply dozens of contactors, safety relays, and pilot lights, the 4AM4842-5AT10-0FA0 delivers 500 VA of galvanically isolated power with a remarkable 91 % efficiency. This SITAS safety transformer connects directly to a 400 V (or legacy 380 V) supply and provides a main 24 V output plus a configurable 2× 12 V auxiliary winding — enough headroom to drive even power‑hungry loads like brake coils or solenoid valves without voltage dips.

Built for Demanding Panels

• 500 VA rated power: supports large control circuits with significant inrush currents, keeping contactors and relays reliably pulled in under full load.
• 91 % efficiency: minimises heat build‑up in densely packed enclosures. Only ~45 W of heat is released, which can be managed with natural convection in a well‑ventilated cabinet.
• Dual secondary outputs: 24 V (20.8 A) for the main control voltage, plus 2× 12 V (41.7 A total) that can be configured as 12 V, 24 V, or two independent 12 V supplies for auxiliary circuits.

Adaptable and Safe

• 400 V / 380 V primary taps: connect directly to the phase‑to‑phase voltage of a European 400 V three‑phase system or to an older 380 V installation without additional transformers.
• Certified to EN 61558‑2‑6: ensures safe galvanic separation for SELV/PELV circuits, essential for operator safety and regulatory compliance.
• Robust EI 84/48 iron core: screw‑fixed, IP00, designed for stationary installation inside a control enclosure.

Technical Specifications