{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1023-3BB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1023-3BB40","canonicalUrl":"https://aoctrl.com/siemens/3RT1023-3BB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1023-3BB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1023-3BB40, S0 frame, 24 VDC coil, screw-type main terminals, spring-loaded auxiliary terminals, IP20 front, snap-on DIN rail mounting.","salesMarkdown":"The coil is 24 VDC, with a holding power of 5.4 W — a steady-state draw that a 24 VDC power supply can budget for without oversizing. Main circuit terminals are screw-type; auxiliary and control circuit terminals are spring-loaded, which saves time on wiring if you're terminating stranded conductors with ferrules. For motor duty, the contactor is rated 4 kW at AC-2, 400 V, and 8.5 A at AC-4, 400 V. AC-2 covers slip-ring motor starting; The 4.5 kW at 500 V and 5.5 kW at 690 V ratings give headroom for higher-voltage motor circuits common in 690 V industrial networks. Auxiliary contact ratings span 10 A at 24 VDC down to 0.3 A at 220 VDC — the DC switching capability drops with voltage because DC arcs are harder to extinguish. For a 24 VDC control loop, the 10 A rating is generous; at 220 VDC the 0.3 A limit means you cannot parallel heavy solenoids on one auxiliary contact. If the panel sits in a non-conditioned space that sees 60 °C ambient, the contactor is still within its rated window. RoHS compliance is confirmed with a substance prohibition date of 01 July 2006, covering the EU RoHS directive.","metaTitle":"Siemens 3RT1023-3BB40 SIRIUS Power Contactor, 24 VDC Coil, S","metaDescription":"Siemens 3RT1023-3BB40 SIRIUS power contactor, S0 size, 24 VDC coil, screw-type main terminals, spring-loaded aux terminals. IP20 front. Active production. Sourced to order. Request","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"100 mm","Solid":"2x (0.25 ... 2.5 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","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":"spring-loaded 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","Ambient Temperature During Operation":"-25 ... +60 °C","With Type Of Coordination 1 Required":"fuse gL/gG: 63 A","at AWG cables for auxiliary contacts":"2x (24 ... 14)","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 (0.25 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","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=235944&mlfb=3RT1023-3BB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1023-3BB40/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RT1023-3BB40?","answer":"The depth is 100 mm, which fits within the standard S0 contactor envelope."},{"question":"What wire sizes does the 3RT1023-3BB40 accept on the main terminals?","answer":"The screw-type main terminals accept 2x (0.25 to 2.5 mm²) solid or stranded, 2x (1 to 2.5 mm²) and 2x (2.5 to 6 mm²) stranded, and up to 2x 10 mm². AWG equivalents are 2x (16 to 12), 2x (14 to 10), and 1x 8."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1023-3BB40","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 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}}