{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1023-1BB40-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1023-1BB40-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1023-1BB40-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1BB40-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, Size S0, 24 VDC coil, screw-type terminals, 45 mm wide, IP20 front, current production.","salesMarkdown":"The 45 mm width and 85 mm height fit a compact footprint; depth is 101 mm including the terminals. The coil draws 5.4 W during both closing and holding, so the thermal load on the control transformer stays constant. Rated operating range is 0.8 to 1.1 times the rated voltage — at 24 VDC that means pickup is guaranteed down to about 19.2 V and the coil can ride through up to 26.4 V without damage. ## Motor Switching Ratings and Coordination For motor duty, this contactor is rated at AC-2 at 400 V for 4 kW and AC-4 at 400 V for 8.5 A. AC-2 covers slip-ring motor starting; The AC-12 maximum operational current is 10 A for resistive loads in the control circuit. Type 1 coordination requires a 63 A gL/gG fuse upstream; Type 2 coordination requires a 25 A gL/gG fuse. The difference matters for panel design: Type 2 coordination limits contactor damage under short circuit so the contactor remains usable after a fault, while Type 1 allows replacement. Main current circuit uses screw-type terminals accepting 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²) solid or stranded wire. Auxiliary and control circuit terminals accept 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or max 2x 10 mm². AWG equivalents for main contacts are 2x (16 to 12), 2x (14 to 10), or 1x 8; for auxiliary contacts 2x (20 to 16), 2x (18 to 14), or 1x 12.","metaTitle":"Siemens 3RT1023-1BB40-1AA0 SIRIUS Power Contactor, 24 VDC, S","metaDescription":"Siemens SIRIUS 3RT1023-1BB40-1AA0 power contactor, 24 VDC coil, Size S0 frame, 45 mm wide, screw terminals, IP20 front. Current production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"101 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":"24 V","On The Front":"IP20","Initial Value":"0.8","Of The Terminal":"IP00","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","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":"4.5 kW","at 690 V rated value":"5.5 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"4 kW","at AC-4 at 400 V rated value":"8.5 A","Substance Prohibitance (Date)":"01.07.2006 00:00:00","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: 25 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","With Type Of Coordination 1 Required":"fuse gL/gG: 63 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":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0","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=117951&mlfb=3RT1023-1BB40-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1BB40-1AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to 3RT1023-1BB40-1AA0?","answer":"The 3RT1023-1AP00 is the same Size S0 frame and coil voltage family but uses an AC coil instead of DC. It will not drop into a panel wired for 24 VDC without changing the control transformer or adding a rectifier. The 3RT1016-1BB42 and 3RT1015-1BB42 are smaller Size S00 frames — same 24 VDC coil but lower current ratings and narrower width."},{"question":"Where can I buy 3RT1023-1BB40-1AA0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation does Siemens provide for 3RT1023-1BB40-1AA0?","answer":"RoHS compliance is documented with a substance prohibition date of 01.07.2006. The part carries a reference code per IEC 81346-2 (Q)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1023-1BB40-1AA0","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/3RT1023-1BB40-1AA0 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}}