{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-3BB44-3MA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-3BB44-3MA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-3BB44-3MA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3BB44-3MA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, S0 frame, 3RT1026-3BB44-3MA0, 11 kW AC-2 at 400 V, 24 VDC coil, screw terminals, IP20 front, snap-on DIN rail.","salesMarkdown":"Rated for 11 kW at 400 V in AC-2 duty (slip-ring motor starting), it handles 15.5 A in AC-4 (plugging/inching) at the same voltage. The AC-12 resistive load rating is 10 A, covering control circuit isolation needs. Screw-type terminals on the main circuit accept 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or a single 10 mm² conductor. Solid wire range is 2x (0.25 to 2.5 mm²). AWG equivalents: 2x (16 to 12), 2x (14 to 10), or 1x 8 for the main contacts. The contactor stands 85 mm tall and 150 mm deep, so factor that into gland-plate clearance and enclosure depth. ## Short-Circuit Coordination and Lifecycle This matters when the contactor sits in a branch with high fault current — the fuse limits let-through energy to protect downstream loads. The DC coil's holding power stays at 5.4 W, so no additional thermal load from a holding-economy resistor is needed.","metaTitle":"Siemens SIRIUS 3RT1026-3BB44-3MA0 Power Contactor, S0, 11 kW","metaDescription":"Siemens SIRIUS 3RT1026-3BB44-3MA0 power contactor, S0 frame, 11 kW at 400 V AC-2, 24 VDC coil, screw terminals, IP20 front, current lifecycle status.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"150 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"85 mm","Maximum":"2 000 m","At The Side":"6 mm","Rated Value":"24 V","On The Front":"IP20","Initial Value":"0.8","Mounting type":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Of The Terminal":"IP00","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Full-scale value":"1.1","Size of contactor":"S0","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","Instantaneous Contact":"2","Side-by-side mounting":"Yes","For Main Current Circuit":"screw-type terminals","Single Or Multi-Stranded":"2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²","at AC-2 at 400 V rated value":"11 kW","at AC-4 at 400 V rated value":"15.5 A","Closing power of magnet coil at DC":"5.4 W","Holding power of magnet coil at DC":"5.4 W","Operating current at AC-12 maximum":"10 A","With Type Of Assignment 2 Required":"fuse gL/gG: 35 A","at AWG conductors for main contacts":"2x (16 ... 12), 2x (14 ... 10), 1x 8","With Type Of Coordination 1 Required":"fuse gL/gG: 100 A","Reference code acc. to DIN EN 81346-2":"Q","Number of NC contacts for main contacts":"0","Number of NO contacts for main contacts":"3","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (24 ... 14)","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"spring-loaded terminals","at ambient temperature 40 °C rated value":"40 A","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Type of voltage of the control supply voltage":"DC","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","Of The Contactor With Added Electronics-Compatible 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=149399&mlfb=3RT1026-3BB44-3MA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3BB44-3MA0/alternatives.json"},"ai":{"faq":[{"question":"What are the key motor ratings for this contactor?","answer":"It is rated for 11 kW at 400 V in AC-2 duty (slip-ring motor starting) and 15.5 A in AC-4 duty (plugging/inching) at the same voltage. The AC-12 resistive load rating is 10 A."},{"question":"What is the coil voltage and power consumption?","answer":"The coil is 24 VDC, consuming 5.4 W for both closing and holding. It is a DC magnet with no holding-economy circuit needed."},{"question":"What wire sizes does the screw terminal accept?","answer":"Main circuit terminals accept 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or up to 1x 10 mm². Solid wire range is 2x (0.25 to 2.5 mm²). AWG equivalents are 2x (16 to 12), 2x (14 to 10), or 1x 8."},{"question":"What is the physical size and mounting method?","answer":"The S0 frame measures 45 mm wide, 85 mm tall, and 150 mm deep. It mounts via screw and snap-on onto a 35 mm DIN rail per EN 50022. Side-by-side mounting is allowed with 6 mm clearance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-3BB44-3MA0","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/3RT1026-3BB44-3MA0 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}}