{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1023-1BB44-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1023-1BB44-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1023-1BB44-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1BB44-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1023-1BB44-1AA0, power contactor, S0 frame, 3 NO main contacts, 24 V DC coil, screw terminals, IP20 front.","salesMarkdown":"The AC-3 rating at 400 V is 4 kW, which covers a standard 4-pole induction motor up to that output; the AC-4 rating at 400 V is 8.5 A, for reversing or inching duty where the contacts make and break under load more often. The IP20 front protection is typical for panel-mounted gear; the terminals themselves are rated IP00, so the panel door or a terminal cover provides the final touch protection. ## Coordination and wiring reality For short-circuit protection, Type 1 coordination requires a 63 A gL/gG fuse; Type 2 coordination needs a 25 A gL/gG fuse. The difference matters for maintenance philosophy: Type 2 leaves the contactor usable after a fault, Type 1 may require replacement. The auxiliary contact block (not included) mounts on the front; the contactor has two instantaneous auxiliary contact positions available. The 10 million mechanical cycles typical means it outlasts most motor starts in a production line before a rebuild is needed.","metaTitle":"Siemens SIRIUS 3RT1023-1BB44-1AA0 Power Contactor, 24 VDC, 3","metaDescription":"Siemens SIRIUS 3RT1023-1BB44-1AA0 power contactor, 24 VDC coil, 3 NO main contacts, S0 frame, 4 kW at 400 V AC-3. Current lifecycle stage, IP20 front. Sourced to order.","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","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 400 V rated value":"4 kW","at 500 V rated value":"4.5 kW","at 690 V rated value":"5.5 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":"4 kW","at AC-4 at 400 V rated value":"8.5 A","With Type Of Assignment 2 Required":"fuse gL/gG: 25 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","at AWG conductors for main contacts":"2x (16 ... 12), 2x (14 ... 10), 1x 8","With Type Of Coordination 1 Required":"fuse gL/gG: 63 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 (0.5 ... 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)","For Auxiliary And Control Current Circuit":"screw-type terminals","at ambient temperature 40 °C rated value":"40 A","Type Of Voltage Of The Control Supply Voltage":"DC","operating current at AC-15 at 230 V rated value":"6 A","operating current at AC-15 at 400 V rated value":"3 A","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","Of The Contactor With Added Electronics-Compatible Auxiliary Switch Block Typical":"5 000 000","type of connectable conductor cross-sections at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12"}},"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=309327&mlfb=3RT1023-1BB44-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1BB44-1AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to this contactor?","answer":"The 3RT1023-1AL20 is a close peer in the same S0 frame, but it uses a 24 V AC coil instead of the 24 V DC coil on this unit. The DC coil holds in at a steady 5.4 W with no AC hum, while the AC version draws an inrush peak. The mounting footprint and terminal layout are identical, so swapping between them requires checking the coil supply type, not rewiring the main circuit."},{"question":"What are the key dimensions for panel layout?","answer":"Width is 45 mm, height is 85 mm, and depth is 150 mm. The contactor snaps onto a 35 mm DIN rail and can be mounted side-by-side with no gap between units."},{"question":"What wire sizes does the main circuit accept?","answer":"The screw terminals accept solid wire from 2x 0.5 mm² up to 2x 4 mm², and stranded wire from 2x 1 mm² up to 2x 10 mm². AWG equivalents are 2x 16 to 12 for solid, and 2x 14 to 10 for stranded, with a single 8 AWG maximum."},{"question":"What compliance documentation is available for this contactor?","answer":"The product carries the reference code Q per DIN EN 81346-2. Siemens SIRIUS contactors are typically CE-marked and UL-listed, though the specific approvals for this order code should be verified against the manufacturer's declaration for the target jurisdiction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1023-1BB44-1AA0","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/3RT1023-1BB44-1AA0 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}}