{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1023-1BW44","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1023-1BW44","canonicalUrl":"https://aoctrl.com/siemens/3RT1023-1BW44","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1BW44","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, S0 power contactor, 3RT1023-1BW44, 48 VDC coil, screw terminals, IP20 front, 45 mm wide.","salesMarkdown":"The 48 VDC coil draws 5.4 W both on pick-up and hold, which simplifies the DC supply sizing — no inrush spike to budget for. Motor power ratings reach 4.5 kW at 500 V and 5.5 kW at 690 V, covering common European and export voltage levels. The IP20 front protection keeps fingers and tools out of the live terminals inside the enclosure; the terminals themselves are rated IP00, so the contactor must live inside a cabinet, not out on the plant floor. ## Environment and wiring Main circuit terminals accept solid conductors from 2x (0.5... 1.5 mm²) up to 2x (0.75... 4 mm²), and stranded conductors from 2x (1... 2.5 mm²) up to 2x 10 mm². That range covers standard motor feeder cables up to about 6 AWG without lugging. Side-by-side mounting is allowed with a 6 mm gap to the side, keeping panel density high. Short-circuit coordination is specified: for Type 2 coordination (limited damage after a fault), use a gL/gG fuse rated 25 A; for Type 1 (replace contactor after fault), use 63 A.","metaTitle":"Siemens 3RT1023-1BW44 SIRIUS Power Contactor, S0, 48 VDC Coi","metaDescription":"Siemens SIRIUS 3RT1023-1BW44 power contactor, S0 frame, 48 VDC coil. Rated for motor loads up to 4.5 kW at 500 V and 5.5 kW at 690 V. Current lifecycle. Quoted to order against RFQ","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":"48 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":"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","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=82652&mlfb=3RT1023-1BW44","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1BW44/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1023-1BW44 and how is it quoted?","answer":"This part is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time."},{"question":"What is the closest functional alternative to 3RT1023-1BW44?","answer":"The closest functional sibling is 3RT1023-1AL20, which shares the same S0 frame and screw-terminal format but uses a different coil voltage. The 3RT1023-1BW44 runs on 48 VDC; the 1AL20 uses a different coil rating. Both mount on the same 35 mm DIN rail and accept the same conductor sizes, so swapping requires only a coil-voltage check on the control transformer."},{"question":"What compliance documentation does Siemens provide for 3RT1023-1BW44?","answer":"As a SIRIUS series product, this contactor carries CE marking for the European market and is designed to meet IEC/EN 60947-4-1. The manufacturer provides a declaration of conformity and technical documentation on request. RoHS and REACH compliance are standard for current-production SIRIUS components."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1023-1BW44","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/3RT1023-1BW44 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}}