{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT5046-1BF40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT5046-1BF40","canonicalUrl":"https://aoctrl.com/siemens/3RT5046-1BF40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT5046-1BF40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S3 power contactor, 3RT5046-1BF40, 110 VDC coil, screw-type terminals, snap-on mounting for 35/75 mm DIN rail, frame size S3.","salesMarkdown":"It mounts on 35 mm or 75 mm standard DIN rail via screw or snap-on fastening, with ±180° rotation and ±22.5° tilt possible on a vertical surface — useful when panel layout forces an unconventional orientation. Frame size S3 and a 70 mm width mean it occupies two standard 35 mm DIN-rail slots side by side, and side-by-side mounting is explicitly permitted — no derating gap required between units. Motor power ratings at 60 °C ambient: 38 kW at 230 V, 66 kW at 400 V, and 114 kW at 690 V — these are the numbers that govern real motor sizing, not the lower 25.4 kW at 690 V figure which applies under a different condition. At 40 °C the conductor cross-section minimum is 50 mm²; at 60 °C it drops to 35 mm², reflecting the thermal derating curve. Switching frequency limits: 900 operations/hour under AC-1 resistive load, 850/h under AC-3 motor starting, 250/h under AC-4 plugging/reversing, and 1,000/h for DC loads. The control supply accepts 110 VDC nominal; at that voltage the coil draws 1 A. At 24 VDC it draws 6 A, at 220 VDC 0.3 A, and at 230 VDC 6 A. ## Termination and protection Main and control circuits use screw-type terminals. Main contacts accept 2x (2.5...16 mm²) solid or stranded, or 2x (10...1/0) AWG. The recommended short-circuit protection is a gL/gG fuse rated 160 A — that's the fuse size to coordinate with upstream selectivity. The contactor supports auxiliary switch extension (product extension auxiliary switch: yes), so you can add feedback contacts or status indication without replacing the base unit.","metaTitle":"Siemens 3RT5046-1BF40 SIRIUS S3 Power Contactor, 110 VDC Coi","metaDescription":"Siemens SIRIUS 3RT5046-1BF40 S3 power contactor, 110 VDC coil, screw terminals, snap-on 35/75 mm DIN rail, active production, RoHS compliant.","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":"110 V","During Storage":"-55 ... +80 °C","at AC-1 maximum":"900 1/h","at AC-3 maximum":"850 1/h","at AC-4 maximum":"250 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","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":"25.4 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","Substance Prohibitance (Date)":"03/01/2017","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":"38 kW","at 400 V at 60 °C rated value":"66 kW","at 690 V at 60 °C rated value":"114 kW","at 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: 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":"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":"120 A","at ambient temperature 60 °C rated value":"100 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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=580253&mlfb=3RT5046-1BF40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT5046-1BF40/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions for panel layout?","answer":"Width is 70 mm (two 35 mm DIN-rail slots), height is 146 mm, depth is 152 mm. Side-by-side mounting is permitted without derating."},{"question":"What coil voltage does this contactor use?","answer":"The coil is rated 110 VDC. At that voltage it draws 1 A during closing and holding, with a steady-state power consumption of 15 W."},{"question":"What is the recommended short-circuit protection?","answer":"A gL/gG fuse rated 160 A is specified for coordination with the contactor's main circuit."},{"question":"Will the 3RT5046-1BF40 drop into a panel designed for the 3RT1036-1AB00?","answer":"The 3RT5046-1BF40 is an S3 frame size, while the 3RT1036-1AB00 is a different frame. Panel cutouts, DIN-rail spacing, and terminal layouts differ — it is not a direct mechanical swap without rewiring and possibly re-drilling the mounting plate."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT5046-1BF40","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/3RT5046-1BF40 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}}