{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-1BW44","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-1BW44","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-1BW44","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1BW44","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S0, 3RT1026-1BW44, 48 VDC coil, screw terminals, 11 kW at AC-2 400 V, IP20 front, snap-on DIN rail.","salesMarkdown":"## SIRIUS S0 power contactor, 48 VDC coil It is rated for 11 kW at AC-2 duty at 400 V, and carries a 15.5 A rated operational current at AC-4 at 400 V — the AC-4 figure governs reversing or inching applications where the contactor makes and breaks stalled rotor current, so that is the number to size against for plugging or jogging duty. The coil is rated 48 VDC, with a closing and holding power of 5.4 W. The DC coil holds continuously at rated voltage; verify your control transformer or power supply can deliver the inrush without droop below the dropout threshold. This is typical for industrial environments but means the contactor should be mounted in a clean, dry enclosure if condensation is expected. The mechanical service life is typically 10,000,000 switching cycles. Electrical life depends on the load and switching frequency; the AC-1 maximum operational current is 10 A, which covers resistive loads like heaters.","metaTitle":"Siemens 3RT1026-1BW44 SIRIUS S0 Power Contactor, 48 VDC Coil","metaDescription":"Siemens 3RT1026-1BW44 SIRIUS power contactor, size S0, 48 VDC coil, 11 kW at AC-2/400 V. Active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"150 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"45 mm","Height":"85 mm","Rated Value":"48 V","On The Front":"IP20","Initial Value":"0.8","Of The Terminal":"IP00","lifecycle_stage":"current","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Full-Scale Value":"1.1","Size Of Contactor":"S0","Solid Or Stranded":"2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"power contactor","at 24 V rated value":"10 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.3 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 500 V rated value":"11 kW","at 690 V rated value":"11 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"11 kW","at AC-4 at 400 V rated value":"15.5 A","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 10), 1x 8","For Auxiliary And Control Circuit":"screw-type terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 35 A","closing power of magnet coil at DC":"5.4 W","holding power of magnet coil at DC":"5.4 W","reference code acc. to IEC 81346-2":"Q","Ambient Temperature During Operation":"-25 ... +60 °C","With Type Of Coordination 1 Required":"fuse gL/gG: 100 A","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","number of NC contacts for main contacts":"0","number of NO contacts for main contacts":"3","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number Of Poles For Main Current Circuit":"3","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Type Of Voltage Of The Control Supply Voltage":"DC","Required Spacing For Grounded Parts At The Side":"6 mm","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","number of NC contacts for auxiliary contacts instantaneous contact":"2","number of NO contacts for auxiliary contacts instantaneous contact":"2","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=496626&mlfb=3RT1026-1BW44","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1BW44/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to 3RT1026-1BW44?","answer":"The 3RT1026-1AB00 is the same frame size S0 but with a 24 VDC coil instead of 48 VDC. The main current path ratings are identical — same 11 kW at AC-2 400 V, same 15.5 A at AC-4 400 V — so if your control voltage is 24 VDC, the 3RT1026-1AB00 drops into the same panel footprint without rewiring the power circuit. The only change is the coil supply."},{"question":"What compliance documentation does Siemens provide for 3RT1026-1BW44?","answer":"Siemens typically provides a Declaration of Conformity covering the Low Voltage Directive and relevant IEC/EN standards (IEC 60947-4-1 for contactors). RoHS and REACH compliance declarations are standard for current-production SIRIUS parts. Specific certificates (UL, CSA, CCC) vary by target market; confirm at quote time if a particular certification is required for your jurisdiction."},{"question":"Where can I buy 3RT1026-1BW44?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-1BW44","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RT1026-1BW44 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}