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Siemens 3RA2120-1KD24-0BB4

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3RA2120-1KD24-0BB4

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Marvo Stock ID MV-25PG
HS Code 85365080
SKU 3RA2120-1KD24-0BB4
Condition New sealed
Warranty 12 months
Weight (kg) 0.50
Length (mm) 165.00
Width (mm) 45.00
Height (mm) 260.00

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Specification & Description

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Specification & Description

Specification Description
Part Number 3RA2120-1KD24-0BB4
Alternative Part Number 3RA21201KD240BB4
Manufacturer Siemens
Product Type Non-fused load feeder
Size S0
Number of Poles 3
Installation Altitude Up to 2,000 metres above sea level
Short Circuit Protection Yes
Overload Protection Yes
Phase Disturbance Recognition Yes
Auxiliary Switch Yes
Insulation Voltage Rated at 690 V with degree of pollution 3
Impulse Voltage Resistance Rated at 6 kV
Protection Class IP20 on the front
Electrical Shock Protection Finger-safe
Operating Current Rated at 32 A
Mechanical Operating Cycles Typical 10,000,000 for auxiliary contacts
Operating Voltage Rated at 690 V
Voltage Type AC for main circuit
Service Power at AC-3 5,500 W at 400 V
Operating Current at AC-3 11.5 A at 400 V
Control Circuit Voltage Type DC for auxiliary and control circuit
Holding Power of Solenoid 5.9 W for DC
Number of Auxiliary Contacts 1 NC contact and 1 NO contact
Overload Trip Class CLASS 10
Overload Release Design Thermal (bimetallic)
Ambient Operating Temperature -20 to +60 °C
Ambient Storage Temperature -50 to +80 °C
Shock Resistance 6g / 11 ms according to IEC 60068-2-27
Mounting Type For snapping onto 60 mm busbar systems
Dimensions (H x W x D) 260 mm x 45 mm x 165 mm
Required Spacing Various spacings required for safe installation, detailed in the datasheet
Type of Electrical Connection Screw-type terminals for main current circuit
Connectable Conductor Cross-sections 1 ... 10 mm² stranded, 2x (2.5 ... 6 mm²) for main contacts
Safety Related Data B10 value with high demand rate according to SN 31920
Certificates/Approvals General Product Approval for use in hazardous locations and other certifications as specified

The Siemens 3RA2120-1KD24-0BB4 is a robust and reliable load feeder designed for fuseless direct-on-line starting applications. This component is part of the esteemed SIRIUS product range and is engineered to facilitate seamless integration into busbar systems measuring 60mm. It is suitable for use in AC networks with a voltage of 400V and is capable of handling currents ranging from 9 to 12.5A, with a control supply voltage rated at 24V DC.

Constructed to deliver high performance, the 3RA2120-1KD24-0BB4 boasts an insulation voltage rated at 690V AC and is equipped with a surge voltage resistance of 6kV, ensuring durability and resilience in challenging industrial environments. The device's electromechanical switching contact design ensures reliable operation, and it comes with an adjustable current response value for the current-dependent overload release, enhancing its versatility across various applications.

The unit's mechanical service life is impressive, with the contactor rated for approximately 10 million switching cycles, indicating a long-lasting and cost-effective solution for industrial automation needs. Additionally, it meets the ATEX directive 2014/34/EU for protection in potentially explosive atmospheres, making it suitable for a wide range of sectors, including those with stringent safety requirements.

With a compact design that allows for vertical mounting and easy snapping onto busbar systems, the Siemens 3RA2120-1KD24-0BB4 is a practical choice for those seeking a direct starter that combines efficiency with a straightforward installation process. Its thermal (bimetallic) overload release with a trip class of CLASS 10 ensures protection against overloads, contributing to the overall safety and longevity of the system it is part of.

Overall, the Siemens 3RA2120-1KD24-0BB4 is a testament to Siemens' commitment to quality, reliability, and innovation in the field of industrial control and automation.

Commonly Asked Questions

Is my order covered by a warranty?

Marvo provides a full 12-month warranty on all products, whatever the condition. For your peace of mind, all parts are ‘Marvo Approved’ which means that they have been tested and checked to ensure that they are in working condition. If you are unhappy with the part(s) you received and would like to request a return, you can do so by completing our quick and easy online form. Once we have received your Returns Request, a member of the team will be in touch to discuss this further with you. You can read more about our warranty policy here.

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We accept card payments from all major credit, debit and Mastercard providers including Visa, American Express, Western Union, Paypal and bank transfers. Before you complete an order you will be prompted to input your payment details, at which point you can enter the relevant card information you wish to use for your transaction. If you are experiencing issues with your payment method then you can contact our team via email here. From there, you will be directed to the most relevant resource or person to help you complete your payment, get your order processed and ensure that your parts are on the way to your delivery address.

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Is Marvo a credible parts supplier?

Marvo is a highly credible supplier of industrial automation parts and components with dedicated hubs around the world offering industry-leading products and services. Marvo is committed to providing a quick, easy and reliable place to source your automation and control components. All purchases come as standard with a comprehensive 12-month return to base warranty meaning that, in just a few clicks, you can source critical parts more seamlessly than ever before. Click here to read an article on how Marvo is redefining convenience for automation and manufacturing professionals.

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Have steps been taken to ensure quality control?

Marvo takes pride in product quality and has put several measures in place to assure high levels of quality standards. For your peace of mind, all parts have been ‘Marvo Approved’ which means that they have been tested and checked to ensure that they are in working condition. Redefine convenience and secure priority delivery on all parts along with a comprehensive 12-month warranty. This is the smart new way to buy automation and control components.

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Frequently Asked Questions

What is the size of the load feeder for this Siemens contactor?

The load feeder for this Siemens contactor is size S0.

Can this device be used for direct-on-line starting?

Yes, this Siemens contactor is designed for fuseless direct-on-line starting.

What is the insulation voltage rating for this contactor?

The insulation voltage rating for this contactor, with a degree of pollution 3, is 690 V AC.

What type of terminals does this contactor have?

This contactor is equipped with screw terminals.

Is there short circuit protection included in this contactor?

Yes, this contactor includes short circuit protection with a magnetic design for the short-circuit trip.

What is the operating voltage range for this contactor?

The operating voltage range for this contactor at AC-3 is up to a rated value of 690 V.

What are the ambient temperature limits for operating this contactor?

The ambient temperature range for operating this contactor is between -20°C to +60°C.

What is the rated control supply voltage for this device?

The rated control supply voltage for this device is 24 V DC.

Does this contactor come with an auxiliary switch?

Yes, this contactor can be extended with an auxiliary switch.

What is the protection class of the front side of this contactor?

The front side of this contactor has a protection class of IP20.

What is the mechanical service life of this contactor?

The mechanical service life of this contactor is typically 10 million switching cycles.

Can this contactor be mounted on a busbar system?

Yes, this contactor is designed for snapping onto 60 mm busbar systems.

What is the conditional short-circuit current rating of this contactor?

The conditional short-circuit current rating (Iq) at 400 V according to IEC 60947-4-1 is 150,000 A.

What is the trip class of the overload release for this contactor?

The overload release for this contactor is of trip class 10.

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Part conditions explained

We want your buying experience to be as seamless as possible. So, here are all of the product descriptions you will see when browsing Marvo, explained a little further:

New unsealed: The product is in its original packaging, but the packaging has been opened or unsealed. It has never been used and should be in near pristine condition.

New sealed: The product is sealed in its original packaging. It has never been opened or used, ensuring that it's in an untouched state.

New unboxed: The product does not come in its original packaging, but it has never been used and is in great working condition.

Refurbished: The product has been previously used, but it has undergone a thorough refurbishment process to restore it to a like-new or functional condition. Any defects or issues have been addressed, making it suitable for reuse.

Used: The product has been previously owned and has been used. It may show signs of wear and tear but is still functional and operational. The condition may vary depending on the specific item and its usage history.

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