Siemens 6EP1433-2BA20 SITOP PSU300S 400-500V AC 24V/5A DC Power Supply

The Siemens SITOP PSU300S 6EP1433-2BA20 is a three-phase stabilized power supply that converts a wide-range 400-500 V 3AC input into a controlled 24 V DC output rated at 5 A (120 W), with an alarm relay contact for 24 V OK status. It carries IP20 protection, 89.5 percent efficiency, and marine classification from ABS and DNV.

Technical Specifications

Certifications & Standards

• CE
• UKCA
• EAC
• CB
• Shipbuilding
• ABS
• DNV
• EPD

Selection Notes

Choose the PSU300S over the single-phase PSU100L/PSU100S when the cabinet already carries a 3AC 400-500 V feed, since running from three phases instead of splitting a single-phase load reduces neutral current and lets the supply hold a wider -25 to +70 C ambient range. The 150 percent overload capability for up to 5 s/min covers brief inrush from contactors or solenoids on the 24 V bus without oversizing the unit. ABS and DNV marine classification, combined with the -25 to +70 C rating, make this the variant to pick for shipboard or offshore panel builds rather than the standard PSU300S without marine approval.

Applications

Supplies 24 V DC control power from a 3-phase 400-500 V feed in control cabinets, marine and offshore electrical panels, and industrial plants already wired for 3AC distribution at the control-power level.