{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT5044-1BB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT5044-1BB40","canonicalUrl":"https://aoctrl.com/siemens/3RT5044-1BB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT5044-1BB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S3 power contactor, 24 VDC coil, screw-type terminals, 70 mm width, 152 mm depth, DIN-rail or screw mounting.","salesMarkdown":"The Siemens 3RT5044-1BB40 is a SIRIUS S3 power contactor with a 24 VDC coil, rated for switching motor loads up to 59 kW at 400 V and 102 kW at 690 V (at 60 °C). It occupies a 70 mm wide footprint on 35 mm or 75 mm DIN rail, with screw-type terminals for the main and auxiliary circuits. Side-by-side mounting is supported, so multiple contactors pack tightly in a panel without derating for heat buildup. The 24 VDC coil draws 6 A at rated voltage. For 110 VDC the draw is 1 A, at 220 VDC it's 0.3 A, and at 230 VDC it's 6 A. The auxiliary and control circuit terminals are screw-type, accepting 2x (2.5...16 mm²) solid/stranded or 2x (10...1/0) AWG. Rated for 1000 switching cycles per hour at DC, AC-1, AC-3, and AC-3e duty. At AC-4 (plugging/reversing) the maximum is 300 cycles per hour.","metaTitle":"Siemens 3RT5044-1BB40 SIRIUS Power Contactor, 24 VDC Coil, 7","metaDescription":"Siemens 3RT5044-1BB40 SIRIUS S3 power contactor. 24 VDC coil, 70 mm width, screw terminals. Active production, sourced to order. Request RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"152 mm","Width":"70 mm","at DC":"1 000 1/h","Height":"146 mm","Rated Value":"24 V","During Storage":"-55 ... +80 °C","at AC-1 maximum":"1 000 1/h","at AC-3 maximum":"1 000 1/h","at AC-4 maximum":"300 1/h","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm and 75 mm DIN rail","at AC-3e maximum":"1 000 1/h","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":"S3","Solid Or Stranded":"2x (2.5 ... 16 mm²)","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"Power contactor","at 24 V rated value":"6 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 690 V rated value":"18.6 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-3e rated value maximum":"1 000 V","Substance Prohibitance (Date)":"03/01/2017","at 40 °C minimum permissible":"35 mm²","at 60 °C minimum permissible":"35 mm²","Insulation Voltage Rated Value":"1 000 V","at 230 V at 60 °C rated value":"34 kW","at 400 V at 60 °C rated value":"59 kW","at 690 V at 60 °C rated value":"102 kW","for AWG cables for main contacts":"2x (10 ... 1/0)","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","With Type Of Assignment 2 Required":"fuse gL/gG: 125 A","closing power of magnet coil at DC":"15 W","holding power of magnet coil at DC":"15 W","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"fuse gL/gG: 250 A","operational current at AC-12 maximum":"10 A","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","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)","at ambient temperature 40 °C rated value":"100 A","at ambient temperature 60 °C rated value":"90 A","Finely Stranded Without Core End Processing":"2x (10 ... 35 mm²)","Type Of Voltage Of The Control Supply Voltage":"DC","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":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0ffc66f671f7af48cdca92708a8450dc.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=580022&mlfb=3RT5044-1BB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT5044-1BB40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT5044-1BB40 and how do I get a price?","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":"Will 3RT5044-1BB40 drop into a panel that was specified around 3RT5044-1BM40 without rewiring?","answer":"The 3RT5044-1BB40 shares the same S3 frame size, DIN-rail mounting, and screw-type terminal layout as the 3RT5044-1BM40. The key difference is the coil voltage — the -1BB40 is 24 VDC, while the -1BM40 uses a different control voltage. Panel cutout and wiring footprint are identical, so it drops in electrically if the coil voltage matches the control circuit."},{"question":"What is 3RT5044-1BB40's listed depth (152 mm) on this component line?","answer":"The depth is 152 mm, with a width of 70 mm and height of 146 mm. These dimensions fit standard S3 contactor panel layouts."},{"question":"What compliance documentation does this brand provide for 3RT5044-1BB40 (RoHS, REACH, UL, IEC)?","answer":"The part is RoHS compliant per substance prohibition date March 1, 2017. It carries pollution degree 3 rating and insulation voltage of 1000 V. Standard Siemens SIRIUS documentation includes IEC/EN 60947-4-1 compliance; UL and CSA listings are typical for the series but should be confirmed against the specific catalog number at order time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT5044-1BB40","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/3RT5044-1BB40 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}}