{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1346-1BB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1346-1BB40","canonicalUrl":"https://aoctrl.com/siemens/3RT1346-1BB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1346-1BB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S3 power contactor, 3RT1346-1BB40, 24 VDC coil, 53 kW at 230 V, screw terminals, DIN-rail mount.","salesMarkdown":"The Siemens 3RT1346-1BB40 is a SIRIUS S3 power contactor rated for 53 kW at 230 V at 60 °C, with a 24 VDC coil drawing 15 W closing power. The screw-type terminals on both main and auxiliary circuits accept up to 50 mm² stranded (2x 10–50 mm²) or 2x 4 mm² solid, so it handles the heavier power feeds without needing a separate terminal block. Mounts via screw or snap-on onto 35 mm or 75 mm standard DIN rail — the S3 frame (146 x 93 x 152 mm) fits most panel layouts, and side-by-side mounting is allowed with no derating gap. The IP20 front enclosure keeps fingers off live terminals inside the panel; the terminal area itself is IP00, so it expects enclosure protection. ## Ratings in context The 24 VDC coil picks up at 0.8 x rated (19.2 V) and drops out at 1.1 x rated (26.4 V), with a closing time of 14–20 ms and arcing time of 10–15 ms — fast enough for most motor-starting sequences. The auxiliary contact ratings cover the common control voltages: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, so it can drive small contactors or PLC inputs directly. Insulation voltage is rated 1 000 V, giving headroom for 690 V systems. For short-circuit protection, the spec calls for a 160 A gL/gG fuse with type 2 coordination — that's the fuse size to order if you're building a coordinated starter.","metaTitle":"Siemens 3RT1346-1BB40 SIRIUS Power Contactor, 53 kW at 230 V","metaDescription":"Siemens 3RT1346-1BB40 SIRIUS S3 power contactor. 24 VDC coil, 53 kW at 230 V, screw terminals, DIN-rail mount. Active lifecycle, available to order. Submit RFQ for pricing and lead","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":"93 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":"1 000 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","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","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":"53 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 gL/gG: 160 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":"4","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":"4","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":"$965.00","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=398215&mlfb=3RT1346-1BB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1346-1BB40/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does 3RT1346-1BB40 carry?","answer":"The part carries a RoHS substance prohibition date of May 1, 2012, confirming EU RoHS compliance. It also meets IEC/EN 60947-4-1 standards for contactors and motor starters, and the SIRIUS series typically includes UL/CSA listings (verify on the nameplate for your specific shipment)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1346-1BB40","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/3RT1346-1BB40 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}}