Eaton STN0.4 Control Transformer 400VA 400V to 230V (204984)

Industrial control circuits often require a stable low-voltage supply isolated from the mains. The Eaton STN0.4 control transformer delivers 400 VA of power, stepping down 400 V AC to 230 V AC for reliable operation of contactors, relays, and other control devices.

Who is it for

Panel builders and machine manufacturers who need a compact, single-phase transformer for control voltage supply in industrial environments.

Main features

• Rated power: 400 VA
• Primary voltage: 400 V AC
• Secondary voltage: 230 V AC
• Single-phase, 50/60 Hz
• Insulation class B, temperature rise class T40/B
• Short-circuit voltage: 5.5%
• Screw terminals for secure wiring
• Screw mounting for easy installation

Specifications

• Rated power: 400 VA
• Primary voltage: 400 V AC
• Secondary voltage: 230 V AC
• Number of phases: 1
• Frequency: 50/60 Hz
• Insulation class: B
• Protection degree: IP00
• Short-circuit voltage: 5.5%
• Ambient operating temperature: -25 to +40 °C
• Mounting type: Screw mounting
• Connection type: Screw terminals
• Standards compliance: EN 61558-2-2, VDE 0570 Part 2-2
• Construction type: Open type
• Cooling method: Natural convection
• Temperature rise class: T40/B

Tips

Ensure adequate ventilation around the transformer to maintain ambient temperature within the specified range. Use appropriate cable cross-sections for the rated current.