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Siemens 6EP1437-3BA00

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Part Number6EP1437-3BA00
TypePower Supplies
Model #6EP14373BA00
Warranty2 Year
Modular unit3AC/24VDC/40A
Input 3-phase AC
Rated V400 ... 500 V
AC V range320 ... 550 V
Overvoltage Resistance2.3 × Vin rated, 1.3 ms
Input current2.2 A
Max switch on current70 A
Mains bufferingat Vin = 400 V
Rated frequency50/60 Hz
Rated line range47 ... 63 Hz
Rated VDC out24 V
Static mains 0.1 %
Max sspikes peak200 mV
Output range24 ... 28.8 V
Status displayGreen LED for 24 V
Max start up delay 2.5 s
Rated current value out40 A
Current range0…40 A
Power supply960 W
Power loss106 W
ControlClosed loop
Primary/secondary isolationYes
Protection ClassClass I
Max current leakage3.5 mA
Protection DegreeIP20
ApprovalsCE mark, UL/cUL

Our Repair Services

MRO Electric repairs CNCs, PLCs, Servo/Spindle Drives, Motors, Amplifiers, VFDs, HMIs, and more, most of which can be repaired in only 3-5 days.

Repair Benefits

MRO can restore your failed 6EP1437-3BA00 to remanufactured condition and save you up to 75% compared to buying new. We offer standard repair pricing to ensure you the best value for your repair.

Our certified technicians use rigorous testing procedures to ensure your parts are restored to fully functioning condition. Our team proudly stands behind all repairs by providing a minimum 2-year warranty.

Our technicians have vast experience with most manufacturers and models. In addition to this 6EP1437-3BA00 we also repair a wide range of other Siemens products, so if you don’t see the model you need, please contact us.

Core Exchange

If you are interested in getting credit for your faulty 6EP1437-3BA00, just let us know, and we can issue you an RMA to send it in as an exchange. Our exchange program provides you with savings and keeps us stocked for the next time you need anything.

  • Shipping Weight : 11lbs

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Ask about exchanging your faulty 6EP1437-3BA00 for credit when ordering from MRO Electric

MRO Electric provides a 2-year warranty on every item we sell and repair. We stand behind all of our products and guarantee them for the full 2 years. If there is an issue with any of our products within the warranty period, we will evaluate the unit and repair or replace it under warranty.

Siemens 6EP1437-3BA00 Overview

The Siemens 6EP1437-3BA00 is a SITOP Modular power supply unit that provides stable power for various industrial applications. It has an input of 3-phase AC with a rated voltage range of 400-500 V and a wide voltage range of 320-550 V. The power supply offers a high level of overvoltage resistance, with a value of 2.3 times the rated input voltage for a duration of 1.3 ms. These products are manufactured in Germany and are designed for Automotive, aerospace, power generation, and electronics usage. They come with a 2-year warranty from MRO Electric. We also carry Power Supplies from other manufacturers such as FANUC and Yaskawa.


The input current of the 6EP1437-3BA00 is 2.2 A at a rated input voltage of 400 V, and it has a switch-on current limiting feature to protect against high currents during startup. The power supply also incorporates protection in the mains power input, requiring a 3-pole connected miniature circuit breaker with a rating of 10-16 A.

On the output side, the 6EP1437-3BA00 provides a controlled and isolated DC voltage of 24 V. It has a total tolerance of ±3% and static mains compensation of approximately 0.1%. The power supply offers an adjustable output voltage range of 24 to 28.8 V, which can be set via a potentiometer. The rated current value is 40 A, and the power supply supports a current range of 0 to 40 A.


To ensure efficient operation, the 6EP1437-3BA00 features dynamic mains compensation and dynamic load smoothing. It has an efficiency of approximately 90% at rated voltage and current, with a power loss of around 106 W. The power supply also incorporates closed-loop control to maintain stable output voltage and quick load step response times.

The power supply is designed to operate in a wide range of environmental conditions, with an ambient temperature range of 0 to 70 °C during operation. It has a robust mechanical design, featuring screw-type terminals for easy and secure connections. The 6EP1437-3BA00 is designed to be mounted on a DIN rail and offers options for additional electrical accessories such as a buffer module and signaling module.


For protection and monitoring, the 6EP1437-3BA00 includes features such as output overvoltage protection, current limitation, and short-circuit protection. It is designed to be short-circuit-proof and offers both overload and short-circuit indicators for easy troubleshooting.


In terms of safety, the power supply provides primary/secondary isolation and complies with safety standards for galvanic isolation. It has a leakage current of a maximum of 3.5 mA and a protection class of Class I. The 6EP1437-3BA00 is also certified with CE, UL/cUL, IECEx, ATEX, and cCSAus approvals.

Overall, the Siemens 6EP1437-3BA00 SITOP Modular power supply unit provides reliable and stable power for industrial applications, offering a wide input voltage range, adjustable output voltage, and various protective features to ensure safe and efficient operation.

Contact Us Today For More Information About Siemens Products

Check out the rest of our Siemens product line. Whether it's using our online instant quote feature, giving us a call at (800) 691-8511, or emailing us at, we strive for customer satisfaction first. This means lower prices and better service for you. For more products like 6EP1437-3BA00, take a look at more from our Power Supplies line. If your current unit has gone bad, take advantage of our Core Exchange program for the most inexpensive route. You can learn more about this program on our FAQ page here. We offer a repair service on all of our 6EP1437-3BA00 products that keep your downtime to a minimum. To stay up to date on manufacturer news, as well as access any of our datasheets, manuals, or other documentation, we suggest you take a look at our blog.

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