24V DIN Rail PSU for Panel Builders Needing 120W Without Rewiring
On-page parameter snapshot
- Output: 24V DC, 5A max, adjustable
- Input: 93–132 VAC or 187–264 VAC (auto-ranging)
- Power: 120W
- Efficiency: 86%
- Operating Range: 0°C to 60°C with derating
- Dimensions: 120.0mm × 50.0mm × 125.0mm
- Certifications: CB, CE, CSA, cUL, cULus, UL (60950-1, UL 508)
Why This Fits Existing Enclosure Layouts
The 120.0mm width aligns with the common 5-unit DIN rail grid used in Siemens S7-300/S7-400 side-by-side arrangements. The chassis depth of 125.0mm clears standard top-hat DIN rail clip clearances without custom bracketry.
ROHS3 Compliant status covers EU machine builds. CB and CE markings satisfy export documentation for industrial machinery sold into EMEA. UL 508 coverage qualifies the unit for US safety relay and distributed I/O power bus applications.
Procurement and Replacement Logic
If the 6EP13331LB00 surfaces as unavailable mid-panel-build, the field engineer needs to confirm pinout match before specifying an alternative. The 6EP13331LD00 shares the 6EP1 series prefix but differs in mounting type (chassis mount vs. DIN rail) and has been discontinued—do not substitute without verifying the mounting interface and terminal layout on the target panel.
Engineer's notes — electrical baseline
Treat the raw specification table as authoritative for siemens 6EP13331LB00 (AC/DC DIN RAIL SUPPLY 24V 120W); category path: Power Supplies - External/Internal (Off-Board) > Industrial, DIN Rail Power Supplies; confirmed specs: series: 6EP1; Package: Bulk; Product Status: Active. Cross-check electrical limits, mounting style, output type, and lifecycle status against the target panel or machine design before freezing the BOM line or authorizing a field swap.
Field notes — install and commissioning
Before energizing or replacing the module, align cabinet power rails, wiring plan, load type, terminal layout, and temperature class with both the manufacturer documentation and the as-built BOM.
Selection notes — BOM and electrical class
Approve this line only when MPN, manufacturer, series, supply voltage, I/O style, mounting, and application role match the design intent. For alternates, diff the same fields first, then validate software/project hooks.