Description
The Siemens 6EP1437-3BA00 is a high-current SITOP Modular stabilized switch-mode power supply (part of the SITOP Modular / SITOP PSU8600 ecosystem periphery units) that converts a three-phase 400–500 V AC input (3 AC) into a regulated 24 V DC / 40 A output (960 W). It is designed for large-scale industrial control panels requiring high 24 V DC current — feeding multiple PLC racks, extensive I/O clusters, HMIs, sensors, and actuators — and can be paralleled (up to 5 units with OR-ing diodes built-in) for redundancy or higher current.
Unlike the compact SITOP Smart line (single-phase), this unit is a book-size modular unit meant for DIN-rail mounting in large panels alongside S7-400, S7-1500R, ET 200SP HA, or SITOP PSU8600 central modules. It features a broad adjustment range (24–28.8 V DC via front potentiometer), DC OK relay contact, and is suitable for use with SITOP BUFFER / UPS1600 modules.
Key Features
- Input: 3-phase AC 400 V … 500 V (–15 % / +10 %) — 50/60 Hz
- Output: 24 V DC (adjustable 24–28.8 V), 40 A continuous (960 W)
- Parallel Operation: Up to 5 units for increased power / N+1 redundancy (built-in OR-ing diodes)
- Signaling: DC OK relay contact + green/red LEDs
- Adjustability: Output voltage trimmed ±20 % via front potentiometer
- Country of Origin: Germany / Romania (Siemens Global)
Technical Specifications (6EP1437-3BA00 — 3AC 400–500 V / 24 V DC 40 A)
Parameter | Specification |
|---|---|
Model / Order Code | 6EP1437-3BA00 (Siemens SITOP Modular 40 A Power Supply) |
Input Voltage (Un) | 3 × 400 V AC … 500 V AC (–15 % / +10 %), 50/60 Hz |
Input Current (typ. @ full load) | ~ 1.8 A @ 400 V AC 3-ph |
Output Voltage (Un) | 24 V DC (adjustable 24 … 28.8 V DC via front pot) |
Rated Output Current | 40 A (continuous) @ 40 °C ambient |
Rated Power | 960 W |
Efficiency | Typ. 92 % |
Power Loss (no load / full load) | ~ 15 W / ~ 80 W |
Hold-up Time | > 20 ms @ nominal load |
Derating | Starts above +45 °C (linear to 60 °C max.) |
Signal Contact (DC OK) | 1 changeover contact, 60 V / 0.5 A max. |
Parallel / Series Operation | Parallel up to 5 units (built-in diode OR-ing); Series for higher V (rare) |
Connection Type | Screw terminals (input L1/L2/L3/PE; output +/–) — spring-cage option on some sibling models |
Mounting | 35 mm DIN rail (EN 60715) — book-format side-by-side mountable |
Dimensions (W×H×D) | 150 mm × 125 mm × 125 mm (approx. — check exact drawing) |
Weight | ~ 2.8 kg |
Standards | CE, UL 508, cULus, GL, ABS, DNV, RoHS |
💡 Application Notes:
Warranty & After-Sales
- Factory new units: 12 months warranty
- Refurbished units: 3-6 months warranty
- Technical support for:
- Output voltage trim & parallel operation wiring (busbar layout for equal load share)
- Signal contact wiring (DC OK relay for fault annunciation)
- SITOP BUFFER / UPS1600 selection for ride-through
- Cross-check vs. QUINT-PS/3AC/24DC/40 (Phoenix) or ABB CP-E 24/40-3 if alternative brand needed
- Compatibility with S7-400 / S7-1500R / ET 200SP HA high-density I/O racks
Delivery Time
- Standard delivery: 3-5 working days (stock items — high-current unit may have longer lead)
- Express shipping available upon request
Why Choose Our Store
- Genuine Siemens SITOP power supplies — not refurbished-clone
- Global supply network with competitive pricing
- Expertise in SITOP selection (Modular vs Smart vs PSU8600 system)
- Comprehensive technical documentation (dimension drawings, derating curves, buffer module guide)
- Responsive customer service and support
Applications
- Large PLC / DCS system power (S7-400, S7-1500R multi-rack, ET 200SP HA clusters)
- High-density I/O cabinets (hundreds of DI/DO/AI/AO modules)
- Machine builder main 24 V DC bus (multiple servos’ logic power, HMIs, safety modules)
- Process skids requiring high 24 V DC current + SITOP buffering
- Parallel N+1 redundant 24 V DC supply for critical processes
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