Siemens 6EP3437-8SB00-0AY0 SITOP PSU8200 3AC 400-500V 24V 40A Power Supply

The Siemens 6EP3437-8SB00-0AY0 is a SITOP PSU8200 stabilized power supply that converts 3 AC 400-500 V input into a regulated 24 V DC output at 40 A (960 W). It delivers 94% efficiency, 100 mV maximum residual ripple, and a 150% overload margin for up to 5 seconds per minute.

Technical Specifications

Certifications & Standards

• CE marking
• UL 508 / cULus
• EAC approval
• RCM
• SEMI F47
• CB-certificate
• ABS marine
• DNV marine
• Environmental Product Declaration

Selection Notes

The 40 A rating covers a full DIN-rail cabinet of PLC, I/O, and HMI loads from a single unit; the PSU8200 family steps down to 25 A or up to 60 A on the same 24 V rail for smaller or larger panels. Adjustable output (24-28 V via potentiometer) compensates for cable voltage drop when the module sits far from the load. The 3 AC 400-500 V input connects directly to a three-phase supply without a step-down transformer, and the 150% overload margin for 5 s/min covers motor-starter inrush without oversizing the supply.

Applications

Used as the main 24 V DC bus supply in industrial control cabinets running PLCs, drives, and I/O from a three-phase feed, and in panels where SEMI F47 compliance is required for semiconductor fab equipment.