The Siemens 6EP1331-1LD01 is a SITOP PSU100D stabilized power supply distinguished by its exceptionally flat 29 mm depth — housed in an aluminum casing that doubles as a heat sink, enabling flush wall mounting in shallow enclosures where standard DIN rail power supplies with their 100+ mm depth cannot fit.

Where the Flat Design Pays Off

• 29 mm depth fits inside control panels with limited clearance behind the mounting plate
• Aluminum flat housing dissipates heat passively — no fan, no vents, no maintenance
• 88% efficiency delivers 24 V DC at 2.2 A (50 W) from any 100–240 V AC mains
• Mounting flexibility: screw directly to a flat surface or clip onto a DIN rail

Technical Specifications

Use Case

Ideal for building automation panels, HVAC controllers, and access control systems where the electrical enclosure is shallow. The flat design also suits distributed I/O boxes mounted directly on machinery frames. For standard-depth DIN rail applications, the PSU100C 6EP1331-5BA00 offers comparable output in a conventional form factor.