Three-Phase Panel Rail with AC/DC Input Flexibility
The 6EP34347SB003AX0 is the midrange member of the Siemens 6EP3 SITOP PSU6200 family. Its wide AC input window (323–576 VAC) covers three-phase industrial mains without external transformers, while the DC bus feed option (450–600V) lets you back it from an existing rectifier rail or UPS bus for redundancy topologies.
On-page parameter snapshot
- Output: 24V DC, 10A maximum, 240W
- AC input: 400–500 VAC nominal (323–576 VAC range)
- DC input: 450–600V, enabling redundancy or UPS-backed configurations
- Efficiency: 95.4% (meets current efficiency directive thresholds for panel-build)
- Operating temperature: 25°C to 70°C with derating
- Dimensions: 155.0mm × 45.0mm × 135.0mm (35 mm DIN rail mount)
- Approvals: CB, cCSAus, CE, CSA, cUL, cULus, UL (60950-1; UL 508)
OEM Panel-Build Fit Check
Pin-compatible with standard 35 mm DIN rail enclosures. No chassis-mount variant in this series shares the same form factor, so substitution requires mechanical rework. The 45 mm width sits between the 35 mm 120W sibling (6EP33337SB000AX0) and the wider 70 mm 480W unit (6EP34368SB000AY0), making it the reference footprint for mid-size cabinet layouts.
Procurement Verification
Certifications Available for Download
CE, CB, cCSAus, CSA, cUL, cULus, and UL certifications are listed for this MPN, referencing 60950-1 and UL 508 standards. Download the official datasheet from the link provided to obtain the formal declaration letters for your compliance file.
Engineer's notes — electrical baseline
When siemens 6EP34347SB003AX0 (AC/DC DIN RAIL SUPPLY 24V 240W); category path: Power Supplies - External/Internal (Off-Board) > Industrial, DIN Rail Power Supplies; confirmed specs: series: 6EP3; Package: Bulk; Product Status: Active is on the short list, reconcile every printed parameter (voltage tiers, current capability, package) with the schematic net names and protection devices you already committed.
Field notes — install and commissioning
Field work should confirm grounding, shielding, and bus coordination with adjacent racks—especially when the raw record shows tight voltage or current margins.
Selection notes — BOM and electrical class
If procurement proposes a look-alike, require a side-by-side on the parameters that actually load the bus—channels, isolation, inrush, and protection class—not marketing series names alone.