{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1446-1BP40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1446-1BP40","canonicalUrl":"https://aoctrl.com/siemens/3RT1446-1BP40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1446-1BP40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S3 power contactor, 3RT1446-1BP40, 230 V AC coil, screw-type terminals, 50 kW at 230 V / 148 kW at 690 V, snap-on 35/75 mm DIN rail.","salesMarkdown":"## SIRIUS S3 power contactor, 230 V coil, screw terminals It is rated for motor loads up to 50 kW at 230 V and 148 kW at 690 V, both at 60 °C ambient, and delivers 22 kW under AC-2 duty at 400 V. Mechanical endurance is rated at 10 000 000 operations typical, with a maximum AC-1 switching rate of 650 cycles per hour. The 230 V AC coil draws its rated control voltage at 230 V. The auxiliary contact block handles 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V — these are the switching limits for signaling or interlock circuits, not the main power path. The main poles carry the motor power figures: 50 kW at 230 V and 148 kW at 690 V (both at 60 °C) are the continuous motor-load capacities at those line voltages. The IP20 rating on the front with cover or box terminal means the front face is touch-safe in a typical enclosed panel; the terminal area itself is IP00, so it must be inside a cabinet or shrouded. Conductor sizing: solid wire up to 2x 4 mm² on the control terminals, stranded power wiring from 2x 10 mm² up to 2x 50 mm² (derated to 35 mm² at 60 °C). ## Sourcing and integration The S3 frame size (146 mm height, 70 mm width, 152 mm depth) fits the common DIN-rail footprint for this class.","metaTitle":"Siemens 3RT1446-1BP40 SIRIUS Power Contactor, S3, 230 VAC Co","metaDescription":"Siemens 3RT1446-1BP40 SIRIUS S3 power contactor. 230 VAC coil, 50 kW at 230 V / 148 kW at 690 V. Screw terminals, snap-on DIN rail. Current lifecycle stage. Sourced to order agains","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":"230 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=470512&mlfb=3RT1446-1BP40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1446-1BP40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 3RT1446-1BP40 and 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 — submit an RFQ for a firm price and lead time."},{"question":"What is the closest functional second-source to the 3RT1446-1BP40?","answer":"The 3RT1044-1FB46 is a smaller S2 frame contactor from the same SIRIUS family. It will not drop into a panel wired for the S3 frame without mechanical and wiring changes — the S3 has larger power terminals and a different mounting footprint. For a direct swap, stay with the S3 frame size."},{"question":"What is the depth of the 3RT1446-1BP40?","answer":"The depth is 152 mm, with a height of 146 mm and width of 70 mm."},{"question":"What solid wire sizes does the 3RT1446-1BP40 accept?","answer":"The control terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid, with a maximum of 2x (0.75 to 4 mm²). The main power terminals accept stranded wire from 2x (10 to 50 mm²), derated to 35 mm² at 60 °C."},{"question":"What compliance documentation does Siemens provide for the 3RT1446-1BP40?","answer":"RoHS compliance is documented with a substance prohibition date of 05/01/2012. The part carries a rated insulation voltage of 1 000 V and is designed for pollution degree 3 per IEC 60947. Standard Siemens documentation includes the declaration of conformity and the datasheet."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1446-1BP40","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/3RT1446-1BP40 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}}