{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1044-1FB46","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1044-1FB46","canonicalUrl":"https://aoctrl.com/siemens/3RT1044-1FB46","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1044-1FB46","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1044-1FB46, size S3, 55 A AC-4 at 400 V, screw terminals, DIN rail mount.","salesMarkdown":"## Mounting and panel fit Mounts via screw or snap-on onto 35 mm or 75 mm DIN rail — the snap-on feature is handy when you're swapping one out in a tight cabinet; no need to loosen screws if the rail is clear. Side-by-side mounting is supported, so you can pack multiple contactors in a row without derating, as long as you respect the ambient temperature limits. Dimensions are 70 mm wide, 163 mm tall, 201 mm deep. Front protection is IP20, which is typical for contactors inside a locked panel — it keeps fingers out but isn't washdown-rated. The terminal area itself is IP00, meaning the wiring compartment is open; that's normal for screw terminals that need access. ## Environmental and compliance Operating temperature range is -25 to +60 °C, which covers most indoor industrial environments from cold warehouses to warm cabinets. Storage range is -55 to +80 °C, so it survives shipping and storage in extreme climates. Pollution degree 3 means it's rated for conductive pollution (condensation, light dust) typical of control rooms and light industrial floors.","metaTitle":"Siemens 3RT1044-1FB46 SIRIUS Power Contactor, S3, 55 A AC-4","metaDescription":"Siemens 3RT1044-1FB46 SIRIUS power contactor, size S3. Active production. 55 A AC-4 at 400 V, 30 kW AC-2, 37 kW at 500 V. Screw terminals, DIN rail mount. RoHS compliant. Source to","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"201 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":"163 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","at AC-2 maximum":"400 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","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":"37 kW","at 690 V rated value":"18.6 kW","Side-By-Side Mounting":"Yes","at 1000 V rated value":"30 W","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"30 kW","at AC-4 at 400 V rated value":"55 A","Substance Prohibitance (Date)":"05/01/2012","at 40 °C minimum permissible":"35 mm²","at 60 °C minimum permissible":"35 mm²","Design Of The Surge Suppressor":"with RC elements","Insulation Voltage Rated Value":"1 000 V","at 230 V at 60 °C rated value":"34 kW","at 690 V at 60 °C rated value":"102 kW","at 1000 V at 60 °C rated value":"66 W","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: 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","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":"2","number of NO contacts for auxiliary contacts instantaneous contact":"2","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=317942&mlfb=3RT1044-1FB46","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1044-1FB46/alternatives.json"},"ai":{"faq":[{"question":"What wire sizes does the 3RT1044-1FB46 accept on the main terminals?","answer":"The screw-type main terminals accept solid wire: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). For stranded wire, it accepts 2x (10 to 50 mm²). There's also a separate terminal for 2x (2.5 to 16 mm²) solid or stranded."},{"question":"What compliance documentation does this part have?","answer":"The part is RoHS compliant with a substance prohibition date of May 1, 2012. It carries IP20 front protection and is rated for pollution degree 3. The operating temperature range is -25 to +60 °C, storage -55 to +80 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1044-1FB46","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/3RT1044-1FB46 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}}