Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | 6EP1333-3BA00 |
| Manufacturer | Siemens |
| Product Type | Stabilized Switch-Mode Power Supply, 1ph/2ph, SITOP modular |
| Input Voltage Range | 120–230 V AC / 230–500 V AC, auto-ranging, 50/60 Hz |
| Input Current | ≈ 1.5 A @ 120 V / ≈ 0.8 A @ 230 V (typical, full load) |
| Output Voltage | 24 V DC (adjustable 24–28.8 V via front potentiometer) |
| Output Current | 5 A continuous (120 W) |
| Power Boost | 300 % rated (15 A) for 25 ms (motor / contactor inrush) |
| Ripple / Stability | ±3 % (typ.), regulated zero-potential DC |
| Efficiency | ≈ 89 % (typical at 230 V AC, full load) |
| Short-Circuit Behavior | Selectable (restart / constant-current modes) |
| Parallel Operation | Soft characteristic selectable for load-sharing |
| Status Indication | 3 LEDs: 24 V OK / overload / fault |
| Operating Temperature | –25 to +70 °C (full 5 A to +60 °C, derate 5 %/K above) |
| Derating Note | 5 %/K above +60 °C (same curve as 6EP1334 sibling per Siemens doc) |
| Mounting | 35 mm DIN rail (EN 60715), zero side clearance required |
| Dimensions (W×H×D) | ≈ 50 × 125 × 120 mm |
| Weight | ≈ 0.5 kg |
| Protection | IP20 (module), overload / short / no-load protected |
| Approvals | CE, cULus, CB, ATEX, IECEx, cCSAus Class I Div 2, DNV GL |
Main Features and Advantages
Worldwide-input in one SKU. The core differentiator of the 6EP1333-3BA00 is the dual-range input: 120–230 V AC covers Japan 100 V (slight undervolt tolerated), North America 120/208 V, Europe 230 V, and China 220 V; flip to 230–500 V AC and the same unit lands on 277 V (North American lighting leg), 380/400/415 V two-phase tapped, or 480 V split-phase secondary. For machine OEMs and system integrators maintaining one panel BOM for global shipments, this eliminates the “120 V version / 230 V version” spare-parts split that plagues lesser PSU lines.
300 % power boost for real-world inrush. A 5 A nameplate sounds tight until a panel wakes up: three 24 V contactors closing, a solenoid bank firing, and the PLC output stage all land together. The 6EP1333-3BA00 delivers 15 A (300 % rated) for 25 ms—long enough to cover contactor close-and-hold transitions—then settles back to steady 5 A. This means specifiers don’t have to oversize to 10 A “just to be safe,” saving DIN-rail space and heat budget.
Adjustable 24–28.8 V output for cable-drop compensation. The front potentiometer lets field engineers nudge the DC bus up to 28.8 V maximum. On panels where the 24 V rail drives long runs of M12 sensor cables or remote I/O drops (ET 200 kind), the extra headroom keeps the far-end device above its 20 V UVLO even under full load. The 6EP1333-3BA00 thus adapts to panel layout rather than forcing the panel to adapt to a fixed 24.0 V.
Zero side clearance, small footprint. At 50 mm wide (roughly 3 TE on a Siemens S7-1200/1500 rail), the 6EP1333-3BA00 doesn’t demand lateral spacing to neighbors—even next to a heat-generating PLC CPU or profinet switch. Only top/bottom convection gaps matter (≥ 40 mm recommended for the family, though the 50 mm width sibling is less demanding than the 90/150 mm PSU300S units). In compact machine-mounted enclosures where every millimeter counts, that zero-side-clearance claim directly converts to one more slot for an I/O card or a terminal block row.
Selectable short-circuit strategy & parallel-ready. Through the onboard changeover switch, the 6EP1333-3BA00 lets you pick whether a sustained short triggers a restart attempt (auto-recover once the fault clears) or clamps to constant-current hiccup—useful when the 24 V rail feeds both sensitive electronics (prefer restart) and inductive solenoid banks (where constant-current limits heating on a stuck-on short). The soft output characteristic can also be selected for parallel switching: two 6EP1333-3BA00 units share load, and a SITOP redundancy module (PSE202U etc.) can be added for 1+1 hot standby without diode-module burn-up.
Ruggedized approvals for harsh duty. Between cULus, ATEX/IECEx (intrinsically safe loop support when paired with IS barriers), cCSAus Class I Div 2 (oil & gas panels), and DNV GL (marine auxiliary panels), the 6EP1333-3BA00 is specified on panels that leave the clean factory floor—offshore skids, water-treatment MCCs, food-line washdown enclosures (outside the spray zone, IP20 inside a higher-rated cabinet). The –25 °C cold-start rating also matters for outdoor telecom/infrastructure panels in northern climates where the unheated enclosure sees winter soak.
Expandable through SITOP ecosystem. The 6EP1333-3BA00 is designed as the anchor PSU for SITOP add-on modules: redundancy (PSE202U), selectivity/diagnostic (PSE201U), buffer (SITOP BU1200/BU2400 for 24 V bridging across mains loss), and DC-UPS (SITOP UPS1600 with BAT1600 batteries). For a panel designer, this means starting with the 6EP1333-3BA00 as the 5 A backbone and scaling protection upward without re-cabling the 24 V distribution.
