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2-year Warranty

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Siemens 3RT1016-2BB42

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2 Year warranty

Part Number3RT1016-2BB42
Model #3RT10162BB42
Warranty2 Year
Ambient temp-25 ... +60 °C
NO contacts3 contacts
Pollution3 Degree
Operating current @24 V20 A 1 current path at DC-3 at DC-5
Operating power @ 400 V13 kW at AC-1
Rated supply voltage24 V DC
MountingScrew and snap on

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 3RT1016-2BB42 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 3RT1016-2BB42 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 3RT1016-2BB42, 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 3RT1016-2BB42 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 3RT1016-2BB42 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.

Siemens 3RT1016-2BB42 Power Contactor

The Siemens 3RT1016-2BB42 Power Contactor is known for its robust capabilities and versatility. Designed as part of the SIRIUS product line, this contactor is a fundamental electrical device used in various industrial applications.

Product Designation and Technical Data

The 3RT1016-2BB42 belongs to the S00 size category, making it compact and suitable for applications where space is at a premium. It comes with an IP20 protection class on the front and the terminal, ensuring adequate protection against dust and foreign particles. This contactor is designed to withstand pollution level 3, which is crucial for its longevity in challenging environments.

When it comes to mechanical service life, the 3RT1016-2BB42 impresses with a typical switching cycle rating of 30,000,000 cycles. However, when equipped with an electronics-compatible auxiliary switch block, it still maintains a robust 5,000,000 switching cycle rating. Additionally, when an auxiliary switch block is added, the contactor can handle a typical 10,000,000 switching cycle, underlining its durability.

Ambient Conditions

The contactor is designed to operate under varying environmental conditions. It can be installed at altitudes of up to 2,000 meters above sea level, making it suitable for applications at elevated locations. Furthermore, it can function efficiently in ambient temperatures ranging from -25°C to +60°C, ensuring reliability in both extreme cold and heat.

Main Circuit

In the main circuit, the 3RT1016-2BB42 boasts three Normally Open (NO) contacts and no Normally Closed (NC) contacts for main contacts. When operating at 400 V in an AC-1 application and at an ambient temperature of 40°C, it has a rated current of 22 A, making it capable of handling substantial electrical loads. Even at higher temperatures (60°C), it still maintains a reliable 20 A rating. In AC-3 applications at 400 V, it can handle a rated current of 9 A.

The contractor is also suitable for DC applications, with a rated current of 20 A at 24 V in a DC-1 application. With multiple current paths in series, it can handle higher currents, providing flexibility in various DC scenarios.

In terms of power handling, the 3RT1016-2BB42 excels, with a rated power loss of only 0.7 W in AC-3 applications at 400 V for the rated value of the operating current per conductor. This efficiency ensures minimal energy waste and contributes to the contractor's overall reliability.

Control Circuit/Control

For control, the 3RT1016-2BB42 operates on a DC supply voltage of 24 V. It maintains a control supply voltage factor ranging from 0.85 to 1.1, ensuring stability even with fluctuations in the control supply voltage. The contactor exhibits a closing power of 3.3 W and a holding power of 3.3 W, providing efficient and reliable operation in control circuits.

Auxiliary Circuit

In the auxiliary circuit, the contactor features one instantaneous Normally Closed (NC) contact and zero instantaneous Normally Open (NO) contacts. It can handle a maximum operating current of 10 A at AC-12 6 A at AC-15 (230 V) and 3 A at AC-15 (400 V). In DC applications, it maintains versatility with rated values ranging from 1 A to 10 A, depending on the voltage.

Short-Circuit Protection and Installation

The 3RT1016-2BB42 is equipped with short-circuit protection. For the main circuit, it requires a gL/gG fuse of 35 A (type of assignment 1) or 20 A (type of assignment 2) for short-circuit protection. For the auxiliary circuit, a 10 A gL/gG fuse is recommended. Installation is convenient, as it supports screw and snap-on mounting onto a standard 35 mm mounting rail according to DIN EN 50022. Side-by-side mounting is also possible, making it suitable for space-constrained applications.

In terms of dimensions, the contactor has a height of 60 mm, a width of 45 mm, and a depth of 73 mm, ensuring compatibility with standard mounting configurations.


In conclusion, the Siemens 3RT1016-2BB42 Power Contactor is a reliable and versatile electrical component. With its compact size, robust mechanical design, and excellent electrical performance, it proves to be an essential asset in industrial applications. Whether in AC or DC scenarios, this contactor offers efficiency, durability, and reliability, making it a trusted choice in the world of electrical control systems. Its flexibility, protection features, and ease of installation further underscore its value in diverse industrial settings.


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 3RT1016-2BB42, 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 3RT1016-2BB42 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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