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Siemens 3TK2821-1CB30

Name: 3TK2821-1CB30
Brand: Siemens
SKU: 3TK2821-1CB30
Price: 65.31 GBP
Availability: InStock

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Marvo Stock ID MV-1I30

HS Code 85364900

SKU 3TK2821-1CB30

Condition Used

Category General Automation

Warranty 12 months

Weight (kg) 1.00

Length (mm) 320.00

Width (mm) 250.00

Height (mm) 250.00

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More about this product

Specification & Description

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Commonly Asked Questions

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Customer Reviews

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Specification & Description

Specification	Description
Part Number	3TK2821-1CB30
Alternative Part Number	3TK28211CB30
Manufacturer	Siemens
Category	General Automation
Weight	0.200 kg
Height	106.00 mm
Width	28.00 mm
Depth	124.00 mm
Commodity Code	853649
Part Description	The Siemens 3TK2821-1CB30 is a safety relay with relay enabling circuits (EC) operating at 24V. It is designed with a screw terminal for secure and reliable connections.
Short Description	Safety relay with relay enabling circuits (EC) 24V
Operating Temperature	-25 … +60 °C
Storage Temperature	-40 … +80 °C
Insulation Voltage	300 V
Protection Class	IP40 for the casing, IP20 for the connection terminal
Resistance to Vibrations	5 ... 500 Hz: 0,075 mm
Resistance to Shocks	8g / 10 ms
Resistance to Surge Voltage	4000 V
Safety Integrity Level (SIL)	SIL1
Performance Level (PL)	d
Category	3
Hardware Fault Tolerance	1
Safety Device Type	Type A
Number of Sensor Inputs	1
Number of Outputs	1 NC contact for reporting function, 3 NO contacts for safety-related instantaneous switching
Stop Category	0

The Siemens 3TK2821-1CB30 is a robust safety relay designed to ensure the highest level of safety in industrial automation processes. This compact device operates at 24V AC and features a screw terminal for secure connections. It is specifically designed to handle emergency stop and protective door monitoring functions, making it an essential component in maintaining a safe working environment.

The 3TK2821-1CB30 is part of the renowned SIRIUS product line from Siemens, known for its reliability and performance. It has a width of 28mm, a height of 106mm, and a depth of 124mm, making it a compact solution for safety applications where space is at a premium.

This safety relay is suitable for Class A environments and has a Safety Integrity Level (SIL) of 1 according to IEC 61508, and a Performance Level (PL) of 'd' according to ISO 13849-1. It is also certified by TÜV, UL, and BG BIA, ensuring its compliance with international safety standards.

The Siemens 3TK2821-1CB30 safety relay is a reliable and efficient solution for your safety needs in industrial automation. Its robust design and advanced safety features make it a trusted choice for professionals in the field.

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.

What payment methods do you accept?

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.

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.

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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Our service to you

Lightning-Fast Express Shipping: Receive your order in record time with our express shipping options, ensuring you minimize downtime and keep your projects on track.

No-Risk Returns, Guaranteed: Return your parts anytime for a full refund. Our hassle-free return policy ensures you’re never stuck with something you don’t need.

Clear Pricing with No Hidden Fees: What you see is what you pay, transparent pricing with no extra costs, ever. Rest assured, all taxes and fees are already included in your final price.

Rock-Solid Reliability at a Fraction of the Cost: Get pre-owned electronic parts that are fully tested for peak performance, saving you money without compromising on quality, backed by a comprehensive warranty.

Frequently Asked Questions

What is the purpose of this safety relay?

The Siemens safety relay is designed to ensure safety in industrial automation systems. It is used in emergency stop units and safety doors to prevent accidents and ensure the safe operation of machinery.

What are the technical specifications of this safety relay?

This safety relay operates at 24V AC/DC and has a width of 22.5mm. It features screw terminals and has an instantaneous enabling circuit of 3S. It is designed to be finger-safe and has an insulation voltage rated at 300V. It can operate in temperatures ranging from -25 to +60 degrees Celsius.

What is the protection class of this safety relay?

The Siemens safety relay has an enclosure protection class of IP40 and a terminal protection class of IP20. This means it is protected against solid objects over 1mm and is not protected against water.

Can this safety relay be used as an expansion unit?

Yes, the 3TK2821-1CB30 safety relay can be used as an expansion unit up to a maximum error safety integrity level (SIL) class of 3.

What is the weight and dimensions of this safety relay?

The Siemens safety relay weighs 0.200 kg and has dimensions of 106mm in height, 28mm in width, and 124mm in depth.

What is the commodity code of this safety relay?

The commodity code for the Siemens safety relay is 853649.

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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