Power Supply, Sized for the Load
The Siemens 6EP1436-3BA00 is a SITOP PSU8200 power supply rated for 20 A continuous output, with a typical current of 23 A. It accepts a three-phase input from 400 to 500 V AC at 50 or 60 Hz, with a full-scale input voltage of 550 V. Efficiency sits at 90 %, which keeps heat dissipation manageable in a closed cabinet. Output is safety extra-low voltage (SELV) per EN 60950-1 and EN 50178, so it's clean for feeding 24 V DC control circuits, PLCs, and I/O slices.
Derating and Ambient Conditions
Full rated current is available from 0 to 60 °C. Above that, up to 70 °C, you derate 2 % per Kelvin — so at 65 °C you're looking at 18 A usable. That's a standard curve for this class, but worth checking if the supply is mounted near other heat sources. Operating range is 0 to 70 °C with natural convection; no forced air required.
Input terminals are, L2, L3, and PE — one screw terminal each, accepting 0.2 to 4 mm² single-core or finely stranded wire. Output side has two screw terminals for + and -, also 0.33 to 4 mm². The upstream feeder needs a 3-pole miniature circuit breaker, 6 to 16 A, characteristic C, or a Siemens 3RV2011-1DA10 (set to 3 A) or 3RV2711-1DD10 (UL 489). That's the manufacturer's recommendation; don't undersize it.
Approvals and Lifecycle
If you're comparing against the 6EP1336-3BA00 (a lower-current sibling), the 6EP1436-3BA00 shares the same DIN-rail footprint and terminal layout, so a panel swap is straightforward — just check the upstream breaker rating matches the higher output.