"Got hold of Sime for a Carrier card for a chiller. Machine down in a factory. Received the new card in express time machine and plant now up and running fantastic service form Sime"
Full 12-month warranty
Available for dispatch immediately
We deliver worldwide
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
The Siemens 3TK2820 Series Safety Relay is a vital component designed to ensure the safe operation of machinery in various industrial settings. This particular model, the 3TK2820-1CB30, operates with a 24 V dc supply and is engineered for screw mounting, making it both versatile and easy to install. With dimensions of 22.6 x 118 x 103.6 mm, it is compact enough to fit into a range of control cabinets and panels. This safety relay is specifically tailored for use with emergency stop units, providing immediate response to potential hazards by initiating a safe and controlled shutdown of machinery. It features a robust design that meets the requirements for IP40 protection class for the enclosure and IP20 for the terminals, ensuring it is safeguarded against particulate ingress and accidental contact. The 3TK2820-1CB30 is equipped with three normally open (NO) contacts for safety-related instantaneous switching and one normally closed (NC) contact for signalling functions. It supports both single-channel and two-channel wiring for sensor inputs, enhancing its flexibility for integration into safety systems. The relay is also designed with cross-circuit proofing, adding an extra layer of security to your safety circuitry. In terms of safety performance, this model achieves a Safety Integrity Level (SIL) of 3 according to IEC 61508, a Performance Level (PL) of e according to EN ISO 13849-1, and a Category 4 according to the same standard. These ratings indicate a high level of reliability and safety for the protection of personnel and equipment. The 3TK2820-1CB30 is suitable for a variety of safety applications, including protective door monitoring, emergency-off function, and position switch monitoring. Its ability to monitor floating sensors and safety-related circuits makes it a versatile choice for a wide range of industrial safety requirements. With its combination of compact design, robust safety features, and flexible application, the Siemens 3TK2820-1CB30 Safety Relay is an essential component for any industrial safety system, contributing to the maintenance of high safety standards while ensuring operational efficiency.
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Support centreOur global network and dedicated team act fast to keep your supply chain moving.
Contact usFind answers, guidance and resources to help you get the most out of our services.
Support centreWhether you're maintaining existing equipment or sourcing parts for current systems, we provide fast, dependable supply you can rely on.
50+ account managers available now
"Got hold of Sime for a Carrier card for a chiller. Machine down in a factory. Received the new card in express time machine and plant now up and running fantastic service form Sime"
"Alex Bailey is my main point of contact at EU Automation...he is extremely friendly, has exceptional customer service skills and always offers great pricing & lead times."
"Tom Higgins provided great prompt service. I contacted Tom by phone and within 10 minutes there was a quote in my in box. WOW Thank you Tom and Thank you EU Automation!"
"Excellent service and communication from Alex Bailey. He truly goes above and beyond to ensure his clients are 100% satisfied. The entire process was seamless, and his attention to detail made a huge difference. Highly recommended for anyone looking for amazing service!"
"Tom Higgins did a great job at getting us the part we needed. He saw a concern with the part a verified before shipping. "
"Thomas Higgins has gone above and beyond to make things happen for my facility. His customer service and knowledge were an asset in helping me with my order and the logistics challenges! "
We take care of the logistics so you don't have to. From customs documentation to real-time tracking, our service ensures your parts arrive on time, every time. Reliable, straightforward delivery you can trust.
Full 12-month warranty
ISO 9001:2015 certified
Swift global delivery
Courtney Zeinert
Facilities Manager
Whether you need advice or help finding the right part, our team is available to assist and keep your operations running smoothly.