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Siemens 3RT1025-1AK60

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Part Number3RT1025-1AK60
Model #3RT10251AK60
Warranty2 Year
Electrical shock protectionFinger-safe
Pollution3 degree
Install alt.2,000 m
Aux switchYes
Operating temp-25 … +60 °C
Storage temp-55 … +80°C
Rated voltage reistance6 kV
Rated insulation voltage690 V
Contacts mains3 NO
Aux circuit contact1 faulty switching per 100 million (17 V, 1 mA)
Aux NC contacts1 NC
Aux NO contacts1 NO
MountingScrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Height85 mm
Width45 mm
Depth97 mm

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 3RT1025-1AK60 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 3RT1025-1AK60 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 3RT1025-1AK60, 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.

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Ask about exchanging your faulty 3RT1025-1AK60 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 3RT1025-1AK60 Overview

Siemens 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 Contactors from other manufacturers such as FANUC and Yaskawa.

The Siemens 3RT2025-1AK60 is a SIRIUS series contactor, designed for AC-3 duty with a rated power of 7.5 kW at 400V. It features a 3-pole configuration and is equipped with 1 normally open (NO) and 1 normally closed (NC) auxiliary contact. The contactor operates with a control supply voltage of AC110V at 50Hz or AC120V at 60Hz. It belongs to the S0 size category and offers screw terminal connections.

Technical Specifications:

The Siemens 3RT2025-1AK60 contactor provides various technical specifications that make it suitable for a range of applications. Here are some key technical data:

  • Protection Class: The contactor has an IP20 protection rating on the front, providing limited protection against solid objects larger than 12.5 mm and no protection against water.
  • Shock and Vibration Resistance: The contactor is designed to withstand shocks and vibrations, making it reliable even in demanding environments. It can withstand AC shocks of 7.5g at 5 ms and 4.7g at 10 ms, as well as AC sine pulse shocks of 11.8g at 5 ms and 7.4g at 10 ms.
  • Impulse Voltage Resistance: The contactor can handle impulse voltages of up to 6kV without damage.
  • Insulation Voltage: It has a rated insulation voltage of 690V, ensuring safe operation.
  • Mechanical Operating Cycles: The contactor is tested to endure approximately 10,000,000 mechanical operating cycles in typical conditions.
  • Ambient Temperature: It can operate within a temperature range of -25°C to +60°C.
  • Control Circuit Voltage: The controlled supply voltage is AC, with a rated value of 110V at 50Hz and 120V at 60Hz.
  • Mounting and Dimensions: The contactor can be mounted on a 35 mm standard mounting rail according to DIN EN 50022. It has a width of 45mm, height of 85mm, and depth of 97mm.

Main Circuit and Operating Current:

The 3RT2025-1AK60 contactor is designed for various operating currents depending on the duty type:

  • AC-1 Duty: At 400V and an ambient temperature of 40°C, the rated operating current is 40A. At 60°C ambient temperature, it is rated at 35A.
  • AC-2 Duty: The rated operating current is 17A at 400V.
  • AC-3 Duty: It is also rated at 17A at 400V.
  • AC-4 Duty: For AC-4 duty at 400V, the rated operating current is 15.5A.

Control Circuit:

The control circuit is designed for AC supply voltage and provides pull-in and holding power for the solenoid coil. The apparent pull-in power for AC is 73V·A, and the apparent holding power is 8.5V·A.

Auxiliary Circuit:

The auxiliary circuit includes both normally closed (NC) and normally open (NO) contacts for instantaneous switching. The operating current for the auxiliary contacts varies based on the type of load and voltage, ranging from 1A to 10A.


The Siemens 3RT2025-1AK60 contactor is commonly used in various industrial and commercial applications. It is frequently employed in motor control systems, pumps, fans, and other electrical equipment to control the flow of current. The contactor's robust design, high mechanical endurance, and wide operating temperature range make it suitable for diverse environments and challenging conditions.

In conclusion, the Siemens 3RT2025-1AK60 contactor is a reliable and versatile component for controlling AC motors and other electrical devices. Its sturdy construction, finger-safe protection, and multiple auxiliary contacts contribute to its popularity and effectiveness in numerous industrial applications.

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 3RT1025-1AK60, take a look at more from our Contactors 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 3RT1025-1AK60 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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