{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1023-1BM45","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1023-1BM45","canonicalUrl":"https://aoctrl.com/siemens/3RT1023-1BM45","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1BM45","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S0, order code 3RT1023-1BM45, rated 10 A AC-12, 4.5 kW at 500 V, 5.5 kW at 690 V, screw-type terminals, snap-on mounting on 35 mm DIN rail.","salesMarkdown":"Its AC-12 rating of 10 A covers control-circuit and resistive loads; the AC-3 motor ratings are 4.5 kW at 500 V and 5.5 kW at 690 V, so it handles standard 4-pole induction motors in that power band. For reversing or plugging duty (AC-4), the contactor is rated 8.5 A at 400 V — a figure that governs the real thermal stress in high-cycle applications, not the higher AC-3 number. Side-by-side mounting is allowed, with a 6 mm air gap at the side for heat dissipation. ## Terminal data and wiring Solid conductors: 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), max 2x (0.75–4 mm²). Stranded: 2x (1–2.5 mm²), 2x (2.5–6 mm²), max 2x 10 mm². AWG equivalents for main contacts: 2x (16–12), 2x (14–10), 1x 8. ## Coil and switching data Switching capacity across the coil's voltage range: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, 6 A at 230 V, 3 A at 400 V. The rated value for the coil is 220 V.","metaTitle":"Siemens 3RT1023-1BM45 SIRIUS Power Contactor, S0, 10A AC-12","metaDescription":"Siemens 3RT1023-1BM45 SIRIUS power contactor, size S0, rated 10A AC-12, 4.5 kW at 500V, 5.5 kW at 690V. Screw terminals, snap-on DIN rail. Active production, 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","Maximum":"2 000 m","At The Side":"6 mm","Rated Value":"220 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":"1","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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","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","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=384581&mlfb=3RT1023-1BM45","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1BM45/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1023-1BM45?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the depth of 3RT1023-1BM45?","answer":"The depth is 150 mm, which is a key dimension for enclosure depth planning and gland-plate clearance."},{"question":"What solid wire sizes does 3RT1023-1BM45 accept?","answer":"Solid conductors: 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), max 2x (0.75–4 mm²). Stranded: 2x (1–2.5 mm²), 2x (2.5–6 mm²), max 2x 10 mm²."},{"question":"Will 3RT1023-1BM45 drop into a panel specified around 3RT1023-1AL20 without rewiring?","answer":"Both are S0 frame size contactors with the same mounting rail and 45 mm width, so the mechanical fit is identical. The terminal wiring capacity is the same. The difference is in the coil voltage and switching ratings — verify the coil voltage matches your control circuit before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1023-1BM45","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/3RT1023-1BM45 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}}