SIEMENS SIRIUS 4AM3442-5MN00-0EA0 1-Phase Control Transformer, 1 kVA, 400/440/480V Primary, 230/115V Secondary, IP00, Screw Mount

For control circuits that demand stable, isolated low voltage from a high-voltage supply, the SIEMENS SIRIUS 4AM3442-5MN00-0EA0 steps in with a 1 kVA rating and multi-tap primary and secondary windings. Unlike generic transformers, this unit is engineered to VDE 0570 / EN 61558, ensuring reliable performance in industrial control panels, machine tools, and automation systems. Its compact design and screw mounting make it a practical choice when space is tight and dependability is non-negotiable.

Highlights

• 1 kVA rated power for demanding control circuits
• Multi-tap primary: 400 V, 440 V, 480 V AC; secondary: 230 V or 115 V AC
• 50/60 Hz operation for worldwide compatibility
• Insulation class B (130 °C) for thermal endurance
• IP00 protection with screw terminals for secure wiring
• Natural air cooling (AN) – no fan, no noise, no maintenance

In daily use

Installation is straightforward: mount the transformer on a flat surface using the provided screw holes, connect the primary to your supply (choose the tap that matches your line voltage), and wire the secondary to your control circuit. The multi-tap design means one transformer can serve different voltage requirements across projects, reducing inventory. With an efficiency above 90% and a short-circuit voltage of approximately 4.5%, it keeps losses low and voltage regulation tight. The ambient operating range of -25 to +40 °C allows use in harsh environments, from unheated workshops to tropical plants.

Full specifications

• Brand: SIEMENS
• Model: 4AM3442-5MN00-0EA0
• MPN: 4AM34425MN000EA0
• EAN: 4042948053706
• Series: SIRIUS
• Type: Control Transformer
• Rated Power: 1 kVA
• Number of Phases: 1-phase
• Primary Voltage: 400 V / 440 V / 480 V AC (multi-tap)
• Secondary Voltage: 230 V / 115 V AC (multi-tap)
• Frequency: 50/60 Hz
• Insulation Class: B (130 °C)
• Protection Class: IP00
• Cooling Method: Natural Air Cooling (AN)
• Mounting Type: Screw Mounting
• Short-circuit Voltage: Approx. 4.5%
• Efficiency: >90%
• Standards: VDE 0570 / EN 61558
• Connection Type: Screw terminals
• Ambient Operating Temperature: -25 to +40 °C

Final note

Built to SIEMENS quality standards, this SIRIUS control transformer is a reliable workhorse for industrial control applications. Its multi-tap flexibility and robust construction make it a smart long-term investment for panel builders and maintenance teams.