Siemens 6EP3424-8UB00-0AY0 SITOP PSU3800 3AC 12V/20A DIN Rail Power Supply

The Siemens 6EP3424-8UB00-0AY0 is a SITOP PSU3800 three-phase power supply built specifically for battery charging applications, taking 400-500 V AC input and delivering a stabilized 12 V DC output rated at 20 A (240 W), with soft-start switch-on behavior, 91% efficiency, and a relay contact for 12 V OK status signaling.

Technical Specifications

Certifications & Standards

• CE
• cULus
• UKCA
• EAC
• RCM
• SEMI F47
• CB
• Shipbuilding Approval
• ABS
• DNV
• EPD

Selection Notes

The 6EP3424-8UB00-0AY0 is the 12 V/20 A member of the PSU3800 family, positioned for lead-acid battery charging circuits where 12 V nominal battery voltage is standard. The soft-start behavior (no output overshoot on power-up) and the constant-current fallback under short circuit are specifically suited to charging duty rather than continuous resistive loads. Choose the 24 V PSU3800 variants instead when the battery bank or DC bus is a 24 V system; this 12 V/20 A model tops out at 240 W, so higher-power charging tasks call for the 24 V/30-40 A model in the same family. The buffer module accessory listed for this device can bridge brief mains dropouts without relying on the battery being charged.