SITOP PSU8200 6EP1433-2BA20 — 3-Phase Power Supply for Control Panels
The Siemens 6EP1433-2BA20 is a SITOP series 3-phase power supply delivering a rated output of 5 A, with a maximum of 8 A available for short-term loads. It accepts a 3-phase input of 400 to 500 VAC at 47 to 63 Hz, making it a direct fit for standard European and North American industrial mains without a step-down transformer. Rated output holds at 5 A continuously; up to 6 A is permissible at ambient temperatures up to +45 °C. Above +60 °C, derate linearly at 5 % per Kelvin up to the +70 °C operating limit. This matters for panels running near the thermal ceiling — plan your load margin accordingly. Efficiency hits 89.5 % at rated load, which keeps enclosure heat rise manageable. The unit snaps onto a DIN rail EN 60715 35x7.5/15 — standard panel integration, no adapter plate needed.
Approvals and Compliance — What the Certifications Mean
Carries cULus-Listing under UL 508 and CSA C22.2 No. 107.1 (File E197259), plus cCSAus to CSA C22.2 No. 60950-1 and UL 60950-1. That means it is accepted for panel builds destined for North American sites without a separate NRTL review. Also holds CE, EAC, C-Tick, and shipbuilding approvals from ABS and DNV GL. Not rated for ATEX or IECEx hazardous locations, and not NEC Class 2. For ordinary industrial environments (dry, non-hazardous) this is the standard choice; if the line runs in a classified area, you need a different SITOP variant with the appropriate protection.
Wiring and Integration Notes
Input terminals:, L2, L3, PE — one screw terminal each, accepting 0.05 to 2.5 mm² single-core or finely stranded wire. Output terminals: + and -, two screw terminals each for 0.2 to 2.5 mm². The dual output terminals simplify daisy-chaining to downstream loads or a distribution block. The upstream feeder requires a 3-pole miniature circuit breaker, 3 to 16 A, characteristic C, or a Siemens 3RV2011-1DA10 (set to 3 A) or 3RV2711-1DD10 (UL 489 listed). This is not optional — the breaker provides the branch-circuit protection the UL listing assumes. Galvanic isolation provides safety extra-low output voltage (SELV) per EN 60950-1 and EN 50178, with a transformer built to EN 61558-2-16. The I²t let-through is 0.5 A²·s maximum, which helps with downstream fuse coordination. Optional accessories include a redundancy module, buffer module, selectivity module, and DC UPS — all from the SITOP family, all designed to share the same DIN-rail footprint and wiring scheme.
This is a current-production part with an MTBF of 500,000 hours at 40 °C. The closest functional sibling in the SITOP family is the 6EP1336-3BA00, a single-phase 400-500 VAC unit with a lower output rating. The 6EP1433-2BA20 is the 3-phase version — if your panel already has 3-phase mains, this is the correct drop-in; the single-phase sibling would require a different feeder circuit and may not match the existing wiring plan.