SIEMENS 3SB3 921-0AK

<h2>Siemens 3SB3921-0AK Protective Collar</h2> <h3>Description</h3> <p>This is a Siemens protective collar, model 3SB3921-0AK, from the SIRIUS 3SB3 series. It is designed to be mounted on a control panel to shield round pushbuttons, most commonly emergency stop buttons, from accidental actuation. Its robust design and clear color make it an essential component for enhancing safety and reliability in industrial environments.</p> <h3>Specifications</h3> <ul> <li>Manufacturer: Siemens</li> <li>Type Number: 3SB3 921-0AK</li> <li>Series: SIRIUS 3SB3</li> <li>Product Type: Protective Collar</li> <li>Color: Yellow</li> <li>Mounting Type: Front plate mounting</li> <li>For use with: Round 50.5 mm control devices</li> <li>Material: Thermoplastic</li> </ul> <h3>Label Info</h3> <ul> <li>Schutzkragen, protective collar</li> <li>for round, yellow, 50,5mm</li> <li>front plate mounting</li> </ul> <h3>Application</h3> <p>Ideal for use in industrial control panels, manufacturing lines, and machinery where preventing unintended operation of critical pushbuttons like E-stops is paramount for operator safety and process integrity.</p> <h3>Country of Origin</h3> <p>Made in Germany.</p> <h3>CO2 Impact</h3> <p>Reusing this part saves approximately 0.6 kg of CO2, contributing to a more sustainable operation by avoiding the production of a new component.</p> <h3>Availability</h3> <p>This item is a discontinued part from an obsolete series but is available as new old stock. Essential for maintaining or repairing existing installations with 3SB3 components. Order now from spareparts2day for expert support and fast delivery.</p> <h3>FAQ</h3> <strong>Question?</strong><br><p>What series of pushbuttons is this 3SB3921-0AK protective collar compatible with?</p> <p>Answer</p><p>This collar is designed for the Siemens SIRIUS 3SB3 series of round control and signaling devices with a 50.5mm diameter, typically used for emergency stop mushroom pushbuttons.</p> <strong>Question?</strong><br><p>What is the material of this protective collar?</p> <p>Answer</p><p>The collar is made from a durable, high-impact thermoplastic, ensuring long-lasting protection against accidental actuation in industrial environments.</p> <strong>Question?</strong><br><p>Can this be used as a replacement for a collar from the newer 3SU1 series?</p> <p>Answer</p><p>No, this part is specifically for the obsolete 3SB3 series. The modern equivalent for the SIRIUS ACT 3SU1 series is a different part number, such as 3SU1900-0BC31-0AA0.</p> <p><em>spareparts2day is not an authorized distributor, reseller or representative of the products featured on this website. All product names, trademarks, brands and logos used on this site are the property of their respective owners.</em></p> <p>Friday, March 13, 2026</p>