{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1035-3BB44-3MA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1035-3BB44-3MA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1035-3BB44-3MA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1035-3BB44-3MA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1035-3BB44-3MA0, size S2, 22 kW at 500 V AC-3, screw-type terminals, IP20 front, snap-on DIN rail mount.","salesMarkdown":"The Siemens SIRIUS 3RT1035-3BB44-3MA0 is a size S2 power contactor, rated for switching motor loads up to 22 kW at 500 V in AC-3 duty. The IP20 front means it's finger-safe for the panel face; the terminals themselves are IP00, which is normal for a panel interior where the enclosure provides the environmental seal. ## Terminal and Wiring Main circuit terminals are screw-type, accepting 2x (0.75…25 mm²) stranded or 2x (0.25…2.5 mm²) solid. The minimum permissible cross-section at 40 °C is 16 mm² — that's the thermal derating floor for full-rated current. Coil terminals are 24 V DC, drawing 10 A at rated voltage, with a dropout time of 20…25 ms and an arcing time of 10…15 ms. That arcing window matters for coordination with upstream fuses or breakers. Operating temperature range is -25…+60 °C; storage goes from -55…+80 °C. Mechanical life is 10 million operations typical; the switching frequency limits (1 200 cycles/h at AC-1, 1 000 at AC-3) give you the thermal duty cycle for repetitive starts.","metaTitle":"Siemens SIRIUS 3RT1035-3BB44-3MA0 Power Contactor, 22 kW at","metaDescription":"Siemens SIRIUS 3RT1035-3BB44-3MA0 power contactor, size S2, 22 kW at 500 V AC-3, screw terminals, IP20 front, current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"179 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"55 mm","at DC":"20 ... 25 ms","Height":"112 mm","Stranded":"2x (0.75 ... 25 mm²)","Arcing Time":"10 ... 15 ms","Rated Value":"24 V","On The Front":"IP20","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of The Terminal":"IP00","at AC-1 maximum":"1 200 1/h","at AC-2 maximum":"600 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 standard mounting rail according to DIN EN 50022","Full-Scale Value":"1.1","Size Of Contactor":"S2","Solid Or Stranded":"2x (0.75 ... 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":"22 kW","at 690 V rated value":"11.4 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"18.5 kW","at AC-4 at 400 V rated value":"35 A","Substance Prohibitance (Date)":"01.05.2012","at 40 °C minimum permissible":"16 mm²","at 60 °C minimum permissible":"16 mm²","Insulation Voltage Rated Value":"690 V","at 230 V at 60 °C rated value":"22 kW","at 690 V at 60 °C rated value":"66 kW","at AWG cables for main contacts":"2x (18 ... 2)","For Auxiliary And Control Circuit":"spring-loaded terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 63 A","closing power of magnet coil at DC":"13.3 W","holding power of magnet coil at DC":"13.3 W","reference code acc. to IEC 81346-2":"Q","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"fuse gL/gG: 125 A","at AWG cables for auxiliary contacts":"2x (24 ... 14)","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 (0.25 ... 1.5 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":"400 A","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 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=173861&mlfb=3RT1035-3BB44-3MA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1035-3BB44-3MA0/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this contactor?","answer":"It is rated 22 kW at 500 V in AC-3 duty, 18.5 kW at 400 V in AC-2, and 35 A at 400 V in AC-4. Coil is 24 V DC, 10 A. Mechanical life is 10 million operations typical."},{"question":"What compliance documentation does this contactor carry?","answer":"The substance prohibitance date is 01.05.2012, indicating RoHS compliance for the EU market. The pollution degree is 3, and the front is IP20 with terminals at IP00."},{"question":"Will 3RT1035-3BB44-3MA0 drop into a panel specified around 3RT1036-1AB00?","answer":"Both are SIRIUS contactors, but the 3RT1036-1AB00 is a different frame size and rating. The 3RT1035-3BB44-3MA0 is size S2; the 3RT1036 is larger. Panel cutouts and busbar spacing may differ — verify the mounting footprint before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1035-3BB44-3MA0","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/3RT1035-3BB44-3MA0 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}}