{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2023-1BM40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2023-1BM40","canonicalUrl":"https://aoctrl.com/siemens/3RT2023-1BM40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2023-1BM40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2023-1BM40 power contactor, Size S0, 24 VDC coil, screw-type terminals, 45 mm wide, 107 mm deep, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"The 24 VDC coil (rated value 220 V, initial value 0.8, full-scale value 1.1) pulls in with screw-type terminals for the magnet coil — no spring-cage here, so expect a screwdriver for termination. Mounting is flexible: screw and snap-on onto 35 mm DIN rail per DIN EN 60715, with the mounting position allowing ±180° rotation on a vertical surface and ±22.5° tilt forward/backward. That means it fits tight enclosures where the rail isn't perfectly level or you need to angle the contactor for wire access. Wire range accepts solid 1–10 mm² and stranded 1–10 mm², plus 2x (0.5–1.5 mm²) or 2x (0.75–2.5 mm²) for auxiliary contacts. The main contact wire range is 16–8 AWG — heavy enough for motor feeders up to the Size S0 rating. That -25 °C lower bound means it's fine for unheated plant areas in moderate climates; if your panel sits in a freezer or northern outdoor cabinet, check the ambient against the -25 °C floor. ## Switching performance and mechanical life Rated for 1 000 1/h at AC-1, AC-2, AC-3, and AC-3e maximum, dropping to 300 1/h at AC-4. That AC-4 rate (plugging/inching duty) is the limiting factor — if your application requires frequent reversing or jogging, the 300 cycles/hour cap governs the duty cycle, not the AC-3 figure. Mechanical life is typical 10 000 000 operations. Arcing time is 10–10 ms (essentially fixed at 10 ms). DC coil dropout time is 15–18 ms — fast enough for most safety circuits, but if you need <10 ms dropout for a safety-rated stop, consider a forced-guided contactor. No rewiring or panel modification needed if you're replacing an existing S0 contactor with the same coil voltage.","metaTitle":"Siemens 3RT2023-1BM40 SIRIUS Power Contactor, Size S0, 24 VD","metaDescription":"Siemens SIRIUS 3RT2023-1BM40 power contactor, Size S0, 24 VDC coil, screw terminals, 45 mm wide, 107 mm deep. Active production, sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"107 mm","Solid":"1 ... 10 mm²","Width":"45 mm","at DC":"15 ... 18 ms","Height":"85 mm","Upwards":"10 mm","Forwards":"10 mm","Stranded":"1 ... 10 mm²","Downwards":"10 mm","Arcing Time":"10 ... 10 ms","At The Side":"6 mm","Rated Value":"220 V","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","at AC-1 maximum":"1 000 1/h","at AC-2 maximum":"1 000 1/h","at AC-3 maximum":"1 000 1/h","at AC-4 maximum":"300 1/h","lifecycle_stage":"current","Auxiliary Switch":"Yes","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715","Full-Scale Value":"1.1","at AC-3e maximum":"1 000 1/h","For Main Contacts":"16 ... 8","Mounting Position":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","Size Of Contactor":"S0","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Power contactor","at 24 V rated value":"10 A","at 48 V rated value":"2 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 125 V rated value":"0.9 A","at 220 V rated value":"0.3 A","at 230 V rated value":"1 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.6 A","at 480 V rated value":"7.6 A","at 500 V rated value":"2 A","at 600 V rated value":"9 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"1 hp","at 200/208 V rated value":"2 hp","at 220/230 V rated value":"3 hp","at 460/480 V rated value":"5 hp","at 575/600 V rated value":"7.5 hp","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"6 kV","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"0.6 W","at AC-2 at 400 V rated value":"4 kW","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"8.5 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"10/01/2009","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"35.2 A","at AC-5b up to 400 V rated value":"7.4 A","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 25A (690V,100kA), aM: 20A (690V,100kA), BS88: 25A (415V,80kA)","Without Load Current Share Typical":"5.9 W","closing power of magnet coil at DC":"5.9 W","holding power of magnet coil at DC":"5.9 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","With Type Of Coordination 1 Required":"gG: 63A (690V,100kA), aM: 32A (690V,100kA), BS88: 63A (415V,80kA)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"0.2 W","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","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)","mirror contact according to IEC 60947-4-1":"Yes","with low demand rate according to SN 31920":"40 %","with high demand rate according to SN 31920":"73 %","Type Of Voltage Of The Control Supply Voltage":"DC","Limited To 1 S Switching At Zero Current Maximum":"170 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"170 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"140 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"104 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"88 A; Use minimum cross-section acc. to AC-1 rated value","contact rating of auxiliary contacts according to UL":"A600 / P600","Of Main Circuit With Degree Of Pollution 3 Rated Value":"690 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","Of Auxiliary Circuit With Degree Of Pollution 3 Rated Value":"690 V","For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (500 V, 1 kA)","minimum cross-section in main circuit at maximum AC-1 rated value":"10 mm²","number of NC contacts for auxiliary contacts instantaneous contact":"1","number of NO contacts for auxiliary contacts instantaneous contact":"1","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$38.10","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c099ae4d865b9b87f4c2fb595ccb3c6b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=239988&mlfb=3RT2023-1BM40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2023-1BM40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT2023-1BM40?","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 is the depth of 3RT2023-1BM40?","answer":"The depth is 107 mm, which is the dimension from the DIN rail mounting surface to the front of the contactor."},{"question":"What wire sizes does 3RT2023-1BM40 accept?","answer":"Solid wire 1–10 mm² and stranded wire 1–10 mm² for main contacts, plus 2x (0.5–1.5 mm²) or 2x (0.75–2.5 mm²) for auxiliary contacts."},{"question":"Will 3RT2023-1BM40 drop into a panel specified for 3RT2024-1AL20-ZX95?","answer":"Both are Size S0 contactors on the same 45 mm DIN-rail footprint, so the mechanical fit is identical. The difference is the coil voltage — 3RT2023-1BM40 uses 24 VDC, while 3RT2024-1AL20-ZX95 uses a different coil. Verify coil voltage compatibility before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2023-1BM40","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/3RT2023-1BM40 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}}