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2-year Warranty

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Siemens 3RT1016-1BB42

DESCRIPTION: Contactor 20Amp 3Pole, 690Volts AC, 1N/C Coil 24Volts DC  

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2 Year warranty

Part Number3RT1016-1BB42
Model #3RT10161BB42
Warranty2 Year
Ambient temperature-25 … +60°C
Installation altitude2000m
Pollution degree3
Number of NO contacts3
Supply voltage24 VDC
Auxiliary circuit1 faulty switching per 100 million (17 V, 1 mA)
Number of NC contacts1
Operating current at AC-12 maximum10 A
Operating current at DC-126 A at 60 V / Rated value
Operating current at DC-1310 A at 24 V / Rated value
Mountingscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Height 57.5 mm
Width45 mm
Depth72 mm
Spacing required for grounded parts6 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 3RT1016-1BB42 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 3RT1016-1BB42 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 3RT1016-1BB42, 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 3RT1016-1BB42 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 3RT1016-1BB42 Overview

Siemens 3RT1016-1BB42 Contactor: A Comprehensive Overview


The Siemens 3RT1016-1BB42 contactor stands as a vital component in electrical systems, engineered for efficient switching in various applications. As part of the SIRIUS product brand, its specifications and capabilities make it a noteworthy contender in the industrial landscape.

Durability and Environmental Adaptability:

With a protection class of IP20 on the front and a degree of pollution of 3, the 3RT1016-1BB42 contactor ensures robust protection against environmental factors. Its operational altitude of up to 2,000 meters above sea level highlights its adaptability to diverse installation environments.

Temperature Resilience:

Capable of operating within a wide temperature range, from -25°C to +60°C, the contactor guarantees reliable performance in varying climates, making it suitable for a spectrum of industrial settings.

Impressive Mechanical Service Life:

Boasting an impressive mechanical service life, the contactor demonstrates a typical switching cycle of 30,000,000 for the main contacts. The addition of an auxiliary switch block extends this lifespan to 10,000,000, while compatibility with electronics-compatible auxiliary switch blocks offers a typical switching cycle of 5,000,000.

Main Circuit Features:

The 3RT1016-1BB42 contactor is equipped with three normally open (NO) contacts for main contacts, featuring an operating current of 9A at AC-3 for 400V. The inclusion of three auxiliary contacts, one normally closed (NC) and no normally open (NO) contacts, caters to instantaneous contact applications.

Robust Operating Power:

With a rated value of 13 kW at AC-1, the contactor showcases its capability to handle substantial loads. Despite this, the active power loss remains minimal at 0.7W for AC-3 at 400V, ensuring energy efficiency during operation.

Control Circuit Efficiency:

Operated by a DC voltage at 24V, the 3RT1016-1BB42 contactor displays a closing power and holding power of 3.3W each. The control circuit exhibits high reliability, experiencing only one faulty switching occurrence per 100 million cycles.

Auxiliary Circuit Specifications:

The auxiliary circuit includes one NC contact for instantaneous contact, and detailed operating currents for AC-12, AC-15, DC-12, and DC-13 provide a comprehensive understanding of the contactor's capabilities.

Short-Circuit Protection:

The contactor mandates specific fuse link designs for both auxiliary and main circuits, ensuring the safety of the electrical system in the event of a short circuit.

Efficient Installation:

Installation is facilitated by screw and snap-on mounting onto a 35mm standard mounting rail according to DIN EN 50022, and side-by-side mounting is possible.

Compact Dimensions and Versatile Connections:

The contactor's compact dimensions (45mm width, 57.5mm height, and 72mm depth) make it suitable for installations with limited space. The electrical connections, designed with screw-type terminals, accommodate various conductor cross-sections for both main and auxiliary contacts.

Frequently Asked Questions 

Q1: What is the main application of the Siemens 3RT1016-1BB42 contactor?

A1: The 3RT1016-1BB42 contactor is designed for efficient switching of electrical circuits and is commonly used in industrial applications.

Q2: What is the protection class and degree of pollution for this contactor?

A2: The contactor has a protection class of IP20 on the front and a degree of pollution of 3, ensuring adequate protection against environmental factors.

Q3: What is the operating temperature range for the 3RT1016-1BB42 contactor?

A3: The contactor can operate in temperatures ranging from -25°C to +60°C, making it suitable for a variety of climates.

Q4: How long is the mechanical service life of the contactor?

A4: The contactor has an impressive mechanical service life, with a typical switching cycle of 30,000,000 for the main contacts and additional cycles with auxiliary switch blocks.

Q5: What is the main circuit configuration of the contactor?

A5: The contactor features three normally open (NO) contacts for main contacts, with an operating current of 9A at AC-3 for 400V.

Q6: What is the rated power and efficiency of the contactor?

A6: The contactor has a rated power of 13 kW at AC-1 and exhibits minimal active power loss (0.7W) at AC-3 for 400V, ensuring energy efficiency.

Q7: How is the contactor controlled, and what is the control voltage?

A7: The contactor is controlled by a DC voltage at 24V, providing efficient and reliable operation.

Q8: What is the closing power and holding power of the contactor's magnet coil?

A8: The magnet coil of the contactor has a closing power and holding power of 3.3W each.

Q9: Can the contactor be used in side-by-side mounting configurations?

A9: Yes, the contactor supports side-by-side mounting, providing installation flexibility.

Q10: What are the dimensions of the Siemens 3RT1016-1BB42 contactor?

A10: The contactor has a width of 45mm, height of 57.5mm, and depth of 72mm, making it compact and suitable for installations with limited space.

Q11: How is the electrical connection designed, and what conductor cross-sections are supported?

A11: The electrical connection is made through screw-type terminals, accommodating various conductor cross-sections for both main and auxiliary contacts.

Q12: What is the short-circuit protection requirement for the contactor?

A12: The contactor requires specific fuse link designs for short-circuit protection in both auxiliary and main circuits.

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.

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 3RT1016-1BB42, 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 3RT1016-1BB42 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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