{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1024-1BB44-3MA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1024-1BB44-3MA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1024-1BB44-3MA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1024-1BB44-3MA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, 3RT1024-1BB44-3MA0, Size S0, 24 VDC coil, screw terminals, 45 mm width, IP20 front.","salesMarkdown":"## SIRIUS 3RT1024-1BB44-3MA0 — Power Contactor, Size S0, 24 VDC The Siemens SIRIUS 3RT1024-1BB44-3MA0 is a Size S0 power contactor with a 24 V DC magnet coil, designed for screw-and snap-on mounting onto 35 mm standard mounting rail per DIN EN 50022. It carries a 5.5 kW motor rating in AC-2 duty at 400 V and reaches 7.5 kW at both 500 V and 690 V, with an AC-4 reversing-duty current of 12.5 A at 400 V. The coil draws 5.4 W during both closing and holding, and the contactor is rated for 10 million mechanical cycles typical. The 45 mm wide, 85 mm high, 150 mm deep footprint fits standard panel layouts. Screw-type terminals on both the main and auxiliary/control circuits accept the listed wire ranges: 2x (0.5–1.5 mm²) and 2x (0.75–2.5 mm²) solid, up to 2x (0.75–4 mm²) max for control wiring; main contacts take 2x (1–2.5 mm²) and 2x (2.5–6 mm²) solid or stranded, max 2x 10 mm². ## Coil and Switching Characteristics The 24 V DC coil picks up at 0.8× rated (19.2 V) and drops out at 1.1× rated (26.4 V) — the dropout margin is tight, so verify supply stability under load. The coil holds at 5.4 W continuously. For the auxiliary contacts, the 24 V DC switching capacity is 10 A; at 60 V it drops to 2 A, at 110 V to 1 A, at 220 V to 0.3 A. The AC-12 maximum operational current for auxiliary contacts is also 10 A. ## Fault Coordination and Compliance For type of coordination 2 (no welding after short circuit), the required backup fuse is gL/gG 25 A. For type of coordination 1 (welding allowed), it is gL/gG 63 A. The contactor is in current lifecycle stage — no phase-out or last-time-buy notice on record. RoHS compliance date is 01.07.2006, covering the EU RoHS baseline. This is an active, current-production Siemens SIRIUS contactor.","metaTitle":"Siemens 3RT1024-1BB44-3MA0 SIRIUS Power Contactor, 24 VDC, S","metaDescription":"Siemens SIRIUS 3RT1024-1BB44-3MA0 power contactor, Size S0, 24 VDC coil, 5.5 kW AC-2 at 400 V, 7.5 kW at 500/690 V, screw terminals, DIN rail mount, IP20 front. Current lifecycle s","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","Rated Value":"24 V","On The Front":"IP20","Initial Value":"0.8","Of The Terminal":"IP00","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","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":"7.5 kW","at 690 V rated value":"7.5 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"5.5 kW","at AC-4 at 400 V rated value":"12.5 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":"screw-type 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","With Type Of Coordination 1 Required":"fuse gL/gG: 63 A","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","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 (0.5 ... 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)","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":"2","number of NO contacts for auxiliary contacts instantaneous contact":"2","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=421517&mlfb=3RT1024-1BB44-3MA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1024-1BB44-3MA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1024-1BB44-3MA0 and get a price?","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 3RT1024-1BB44-3MA0?","answer":"The depth is 150 mm, with a width of 45 mm and height of 85 mm."},{"question":"What wire sizes does the 3RT1024-1BB44-3MA0 accept?","answer":"Control circuit screw terminals accept 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), max 2x (0.75–4 mm²) solid. Main contact screw terminals accept 2x (1–2.5 mm²), 2x (2.5–6 mm²), max 2x 10 mm² solid or stranded."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1024-1BB44-3MA0","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/3RT1024-1BB44-3MA0 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}}