
The Siemens 6EP1437-3BA00 is a SITOP Modular 40 A stabilized power supply unit designed for demanding industrial automation applications. It converts three-phase AC input voltage of 400-500 V into a regulated 24 V DC output with 40 A current capacity and 960 W power output. The unit features a wide voltage input range of 320-550 V AC for reliable operation under varying mains conditions. Key features include adjustable output voltage from 24 to 28.8 V DC, Power Boost function delivering up to three times nominal current for brief periods, selectable short-circuit behavior with constant current or latching shutdown, and high efficiency up to 95%. The compact DIN rail-mounted design includes LED status indicators, overvoltage protection, and galvanic isolation. It is suitable for complex industrial systems requiring stable, reliable power with advanced protection and monitoring capabilities.
Item Details
- Brand Name: Siemens
- Manufacturer: Siemens
- Item Type Name: Stabilized Power Supply Unit
- Product Family / Series: SITOP Modular
- Model Number: 6EP1437-3BA00
Product Specifications
- input_voltage_rated: 400-500 V AC
- input_voltage_range: 320-550 V AC
- input_phases: 3-phase AC
- input_frequency_rated: 50/60 Hz
- input_frequency_range: 47-63 Hz
- input_current_at_400V: 2.2 A
- output_voltage_nominal: 24 V DC
- output_voltage_adjustable_range: 24-28.8 V DC
- output_current_rated: 40 A
- output_power: 960 W
- power_loss_typical: 106 W
- current_limitation_typical: 46 A
- output_overvoltage_protection: < 35 V
- overvoltage_resistance: 2.3 × Vin rated for 1.3 ms
- mains_buffering_at_400V: ≥ 6 ms at rated output current
- switch_on_current_limiting_max: 70 A at +25 °C
- efficiency: up to 95%
- power_boost: up to 3× rated current for brief periods
Additional Details
- Certifications / Approvals: CE, UL 508 (File E197259), CSA C22.2 No. 14, CSA C22.2 No. 107.1
- Degree Of Protection: IP20
- Protection Class: Class I
- Leakage Current Max: 3.5 mA
- Primary Secondary Isolation: Yes, galvanic isolation
- Short Circuit Proof: Yes
- Mounting Type: DIN rail mount
- Status Indicators: 3 LEDs (output voltage OK, ready for operation, overload/shutdown)
- Ambient Temperature Range: -25 °C to +70 °C
- Connection Type: Screw-clamp terminals (0.2-4 mm² single-wire)
Measurements
- Weight: 3.2 kg
- Width: 240 mm
- Depth: 125 mm
- Height: 125 mm
All PLC Direct products come with a 1-year warranty. The warranty is issued by PLC Direct. Warranty coverage commences at the date of purchase. The warranty is for mechanical defects or failures not caused by human factors including but not limited to (a) incorrect installation, (b) operating the unit in sub-optimal conditions or in scenarios not recommended by the manufacturer, (c) poor unit maintenance, etc. The warranty does not cover programming or software related issues.
If the product is eligible for PLC Direct’s warranty coverage and the customer encounters an issue with the product, we will request the item is shipped to us for diagnosis and examination. Regardless of the cause of product issues, the customer will bear responsibility for the cost of shipping the unit to PLC Direct for evaluation. Where the unit was damaged by human factors, we will offer a repair or replace quote; in cases where damage was caused by human factors, the customer is responsible for the cost of shipping the repaired/replaced unit from PLC Direct to the customer. Where the unit was not damaged by human factors but is covered by PLC Direct’s warranty, we will repair or replace the unit at our cost (or, in rare cases, refund you your purchase); in such cases, PLC Direct will bear the cost of shipping the repaired or replaced product back to the customer. It is up to PLC Direct’s discretion whether to repair, replace, or refund the customer in such cases. Diagnoses can take time to complete based on technician availability and the complexity of diagnosis.
In no event shall PLC Direct be liable for any damages except actual damages up to, but not exceeding, the amount paid to us for the product, including we shall not be liable for any consequential or indirect damages or lost profits whether or not advised of same.
PLC Direct offers free shipping worldwide. Product ship from a various warehouses worldwide based on the customer's and the product's location. The estimated delivery date on the product page is PLC Direct's best estimated assuming a US-based shipping destination.
Regardless of where the product is shipping from, PLC Direct covers all duties for US-based shipping destinations. For non-US-based shipping destinations, customers are responsible for duties as appropriate.
PLC Direct's focus is on balancing price with lead time. Some but not all products can be expedited. If you have questions about delivery ETAs, please contact our team.

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