{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1023-1BM40-ZW97","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1023-1BM40-ZW97","canonicalUrl":"https://aoctrl.com/siemens/3RT1023-1BM40-ZW97","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1BM40-ZW97","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, Size S0 power contactor, 3RT1023-1BM40-ZW97, screw-type terminals, 4.5 kW at 500 V AC-3, 8.5 A at 400 V AC-4, IP20 front, snap-on DIN rail mount.","salesMarkdown":"## SIRIUS Size S0 power contactor — 3RT1023-1BM40-ZW97 The Siemens 3RT1023-1BM40-ZW97 is a SIRIUS Size S0 power contactor rated 4.5 kW at 500 V in AC-3 duty and 8.5 A at 400 V in AC-4 duty. For standard motor starting (AC-3), the 4.5 kW at 500 V and 5.5 kW at 690 V tell you the load it can handle across common industrial voltages. Main circuit terminals are screw-type, accepting 2x (1 to 2.5 mm²) stranded, 2x (2.5 to 6 mm²), or max 2x 10 mm². Solid wire range is 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). AWG equivalents for main contacts: 2x (16 to 12), 2x (14 to 10), 1x 8. The 45 mm width leaves room for side-by-side mounting without derating, with a 6 mm side clearance specified. The magnet coil draws 5.4 W on both closing and holding at DC, so the control transformer or DC supply must sustain that continuous draw. Rated control supply voltage is 220 V. Auxiliary contact ratings: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V — these are the make/break capacities for the built-in auxiliary, not the main poles. ## Short-circuit coordination For Type 1 coordination, the maximum fuse rating is gL/gG 63 A; for Type 2, it's gL/gG 25 A. Type 2 coordination (25 A fuse) keeps the contactor usable after a fault — the contacts may weld but the device remains functional. Type 1 (63 A) allows the contactor to be destroyed but clears the fault.","metaTitle":"Siemens 3RT1023-1BM40-ZW97 SIRIUS Power Contactor, Size S0,","metaDescription":"Siemens 3RT1023-1BM40-ZW97 SIRIUS power contactor, Size S0, 4.5 kW at 500 V AC-3, 8.5 A at 400 V AC-4. Screw terminals, IP20 front. Active production. Quoted to order.","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","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":"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 (0.5 ... 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=127478&mlfb=3RT1023-1BM40-ZW97","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1BM40-ZW97/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to 3RT1023-1BM40-ZW97?","answer":"The 3RT1023-1AL20 is the closest sibling in the same Size S0 frame. The key difference is the coil voltage — the -ZW97 variant carries a 220 V coil, while the -1AL20 uses a different control voltage. Physically, both share the same 45 mm width, 85 mm height, and 101 mm depth, so they drop into the same panel layout without rewiring the main power circuit, but the control circuit must match the coil rating."},{"question":"Where can I buy 3RT1023-1BM40-ZW97?","answer":"This part is sourced to order against an RFQ through independent distribution channels. Submit a request for quote to confirm current availability and pricing — the supply posture is quoted at time of order, not held as shelf stock."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1023-1BM40-ZW97","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/3RT1023-1BM40-ZW97 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}}