SIEMENS 3RT1017-1BB42

<h2>Siemens SIRIUS 3RT1017-1BB42 Power Contactor</h2> <h3>Description</h3> <p>The Siemens 3RT1017-1BB42 is a 3-pole power contactor from the proven SIRIUS series, designed for switching motors. This size S00 contactor is a robust and reliable solution for industrial control systems. It operates with a 24V DC coil and is rated for motor loads up to 5.5 kW at 400V AC (AC-3). This component comes new in its original box (New Old Stock).</p> <h3>Specifications</h3> <ul> <li>Manufacturer: Siemens</li> <li>Series: SIRIUS</li> <li>Model: 3RT1017-1BB42</li> <li>Type: Power Contactor</li> <li>Number of Poles: 3</li> <li>Control Voltage: 24V DC</li> <li>Rated Power (AC-3, 400V): 5.5 kW</li> <li>Rated Current (AC-3, 400V): 12 A</li> <li>Auxiliary Contacts: 1 Normally Open (NO), 1 Normally Closed (NC)</li> <li>Size: S00</li> <li>Connection Type: Screw terminals</li> </ul> <h3>Label Info</h3> <ul> <li>Part Number: 3RT1017-1BB42</li> <li>EAN: 4011209272873</li> <li>Date Code: G/150415 (2015)</li> </ul> <h3>Application</h3> <p>This contactor is ideal for use in industrial automation for starting and protecting motors, controlling heating elements, lighting, and other electrical loads in machine building, plant engineering, and control cabinet construction.</p> <h3>Country of Origin</h3> <p>Made in Germany.</p> <h3>CO2 Impact</h3> <p>By purchasing this reused component, you are helping to avoid the production of a new one, saving an estimated 4.5 kg of CO2. This saving is comparable to the emissions from driving a standard passenger car for 22.5 kilometers.</p> <h3>Availability</h3> <p>This is an obsolete item but is available from our stock as a new, unused part. The direct modern replacement is the Siemens 3RT2017-1BB42. Order now from spareparts2day for expert support and fast delivery.</p> <h3>FAQ</h3> <strong>What is the difference between the 3RT10 and the successor 3RT20 series?</strong><br><p>The 3RT20 series is more compact, more energy-efficient, and offers a wider range of accessories that can be mounted without tools. However, the 3RT1017-1BB42 remains a direct functional equivalent for replacement purposes.</p> <strong>Can I use this 24V DC contactor in a 24V AC control circuit?</strong><br><p>No. This model with part number suffix -1BB42 is specifically designed for a 24V DC control voltage. Using it with AC voltage will damage the coil. For 24V AC, you would need a different model, such as the 3RT1017-1AB02.</p> <strong>What is the maximum rated current for this contactor under an AC-1 utilization category?</strong><br><p>For purely resistive loads (AC-1), this contactor has a conventional thermal current (Ith) rating of 18 Amperes, which is higher than its AC-3 rating for inductive motor loads.</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>Last Update: Friday, March 13, 2026</p>