{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1023-3BB40-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1023-3BB40-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1023-3BB40-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1023-3BB40-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, Size S0, 24 V DC coil, screw-type terminals, 45 mm width, IP20 front, current production.","salesMarkdown":"## Siemens SIRIUS 3RT1023-3BB40-1AA0 — Power Contactor, Size S0, 24 VDC Coil Rated for AC-3 motor duty, it handles 4.5 kW at 500 V and 5.5 kW at 690 V, with an AC-4 breaking current of 8.5 A at 400 V for reversing or inching applications. The coil draws 5.4 W during both pick-up and hold, so the control transformer sizing is straightforward — no inrush spike to over-spec for. For short-circuit protection, Type 1 coordination calls for a 63 A gL/gG fuse; Type 2 requires 25 A. Side-by-side mounting is permitted with zero gap, which simplifies busbar and wiring runs in a multi-contactor motor control center. The IP20 front protection means the contactor is safe for finger contact inside a closed panel; the terminals themselves carry IP00, so live parts are exposed only during wiring. Depth of 101 mm leaves clearance for standard 120 mm deep enclosures. ## Auxiliary Contact Switching Capacity The integrated auxiliary contacts (1 NO + 1 NC, instantaneous) are rated for switching at various control voltages: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 0.3 A at 220 V DC. These ratings cover most PLC output and relay interface loads without an additional interposing relay.","metaTitle":"Siemens 3RT1023-3BB40-1AA0 SIRIUS Power Contactor, 24 VDC Co","metaDescription":"Siemens SIRIUS 3RT1023-3BB40-1AA0 power contactor, Size S0, 24 VDC coil, screw terminals, IP20 front. Rated for motor loads up to 5.5 kW at 690 V. Current production. Available to","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"101 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":"4.5 kW","at 690 V rated value":"5.5 kW","Instantaneous Contact":"0","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","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: 25 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 (0.25 ... 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=260119&mlfb=3RT1023-3BB40-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1023-3BB40-1AA0/alternatives.json"},"ai":{"faq":[{"question":"What are the key motor power ratings for the 3RT1023-3BB40-1AA0?","answer":"In AC-3 duty it is rated for 4.5 kW at 500 V and 5.5 kW at 690 V. For AC-4 reversing duty, the breaking current is 8.5 A at 400 V."},{"question":"What is the coil voltage and power consumption?","answer":"The magnet coil is rated 24 V DC, consuming 5.4 W for both closing and holding — no inrush peak to account for in the control transformer sizing."},{"question":"What fusing is required for Type 1 and Type 2 coordination?","answer":"Type 1 coordination requires a 63 A gL/gG fuse; Type 2 coordination requires a 25 A gL/gG fuse."},{"question":"Where can I buy the 3RT1023-3BB40-1AA0 and get current pricing?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at the time of quote."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1023-3BB40-1AA0","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/3RT1023-3BB40-1AA0 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}}