The Siemens 6EP1336-1LB00 is a SITOP PSU100M power supply, current production. It delivers a rated 20 A at 24 V DC, with an efficiency of 92% at rated input. That efficiency figure means less heat to manage inside the enclosure — important when you're packing multiple supplies into a single cabinet. The rated range is 0 to 20 A, but above +45 °C ambient you derate 2.5% per Kelvin up to +70 °C. So at 60 °C ambient, you're looking at about 15 A usable — plan your load budget accordingly. Input accepts 85 to 264 V AC (47 to 63 Hz) or 88 to 370 V DC, so it handles both common industrial mains and DC bus feeds without a separate input module. Mounting is snap-on onto DIN rail EN 60715 35x7.5/15 — no tools needed, just clip it onto the rail. The housing is IP20, so it's meant for a clean, dry cabinet interior, not washdown areas.
It carries cULus listing under UL 508 and CSA C22.2 No. 107.1, File E197259, plus CE and EAC marks. That means it's accepted for panel builds in North America, Europe, and Eurasian Customs Union territories without a separate evaluation. Galvanic isolation provides safety extra-low voltage (SELV) output per EN 60950-1 and EN 50178. So the 24 V DC output is safe to touch and suitable for powering control circuits, PLCs, and sensors without additional isolation barriers. No ATEX or IECEx certification on this unit, and no UL hazardous location approval. Keep it in general-purpose areas only.
Wiring and protection details
Output: two screw terminals each for + and -, same wire range. The dual output terminals make daisy-chaining to downstream loads or another supply straightforward. Internal fuse is a T 10 A/250 V (not user-accessible). For the feeder, Siemens recommends a miniature circuit breaker from 10 A, characteristic C. The maximum I²t is 3.3 A²·s — useful for coordination if you're doing selectivity studies. Leakage current is 3.5 mA maximum, 0.8 mA typical. That's low enough that you don't need to worry about nuisance tripping of RCDs in most installations, but still worth checking if you're on a sensitive GFCI circuit.