{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1446-1BB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1446-1BB40","canonicalUrl":"https://aoctrl.com/siemens/3RT1446-1BB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1446-1BB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1446-1BB40, S3 frame, 24 VDC coil, screw terminals, 1 000 V insulation voltage, 152 mm depth.","salesMarkdown":"It carries a 24 VDC coil and is rated for an insulation voltage of 1 000 V, with a degree of pollution 3 — meaning it handles industrial atmospheres with conductive dust or humidity without derating. Motor power ratings define the real-world capability: at 400 V AC-2 duty it switches 22 kW; at 690 V at 60 °C it handles 148 kW. These numbers tell you the contactor is sized for heavy motor loads — think large pumps, compressors, or conveyor drives on a 690 V line. Auxiliary contact ratings cover control-circuit switching: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 0.3 A at 220 V DC. That range means it can pilot PLC outputs or relay coils across common control voltages. Dimensions are 146 mm high, 70 mm wide, 152 mm deep — the depth is the key fit check for shallow enclosures or gland-plate clearance. The S3 frame is larger than the S0 or S2 siblings, so verify the back-panel layout before committing the BOM line. Wire sizes accepted: solid 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²); stranded 2x (10 to 50 mm²); and solid/stranded 2x (2.5 to 16 mm²). The 50 mm² stranded capacity tells you this contactor can terminate heavy power cables without a lug kit. The wide storage range is typical for warehouse or site-staging conditions — the operating limit is what governs panel ambient. Protection rating is IP20 on the front with cover or box terminal; the terminal itself is IP00. That means the contactor is protected against finger contact on the front face, but the wiring compartment needs enclosure-level protection — standard for panel-mount gear. RoHS compliance date is 05/01/2012 — the part meets EU substance restrictions from that date forward. No UL or CSA listing appears in the spec record, so verify with the full datasheet if your site requires those marks.","metaTitle":"Siemens 3RT1446-1BB40 SIRIUS Power Contactor, 24 VDC Coil, 1","metaDescription":"Siemens 3RT1446-1BB40 SIRIUS power contactor, 24 VDC coil, S3 frame, 690 V rated insulation, 148 kW at 690 V 60 °C. Current production. RFQ for pricing.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"152 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"70 mm","at DC":"14 ... 20 ms","Height":"146 mm","Stranded":"2x (10 ... 50 mm²)","Arcing Time":"10 ... 15 ms","Rated Value":"24 V","On The Front":"IP20; IP20 on the front with cover / box terminal","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of The Terminal":"IP00","at AC-1 maximum":"650 1/h","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm and 75 mm standard mounting rail","Full-Scale Value":"1.1","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":"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":"29.9 kW","at 690 V rated value":"38.2 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"22 kW","Substance Prohibitance (Date)":"05/01/2012","at 40 °C minimum permissible":"50 mm²","at 60 °C minimum permissible":"35 mm²","Insulation Voltage Rated Value":"1 000 V","at 230 V at 60 °C rated value":"50 kW","at 690 V at 60 °C rated value":"148 kW","at AWG cables for main contacts":"2x (10 ... 1/0)","For Auxiliary And Control Circuit":"screw-type terminals","With Type Of Assignment 2 Required":"Fuse gR: 250 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","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","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)","Thermal Short-Time Current Limited To 10 S":"600 A","Finely Stranded Without Core End Processing":"2x (10 ... 35 mm²)","Type Of Voltage Of The Control Supply Voltage":"DC","Required Spacing For Grounded Parts At The Side":"6 mm","contact rating of auxiliary contacts according to UL":"A600 / Q600","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","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=462359&mlfb=3RT1446-1BB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1446-1BB40/alternatives.json"},"ai":{"faq":[{"question":"What are the key motor power ratings for 3RT1446-1BB40?","answer":"At 400 V AC-2 duty it switches 22 kW; at 690 V at 60 °C it handles 148 kW. At 500 V the rating is 29.9 kW, and at 690 V standard it is 38.2 kW."},{"question":"What is the coil voltage and auxiliary contact capacity?","answer":"The coil is 24 VDC. Auxiliary contacts are rated 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 0.3 A at 220 V DC."},{"question":"What wire sizes does the screw terminal accept?","answer":"Solid wire: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded: 2x (10 to 50 mm²). Also accepts 2x (2.5 to 16 mm²) solid or stranded."},{"question":"What is the mounting method and dimensions?","answer":"Mounts on 35 mm or 75 mm DIN rail via screw or snap-on. Dimensions: 146 mm high, 70 mm wide, 152 mm deep."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1446-1BB40","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/3RT1446-1BB40 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}}