{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1035-3AF00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1035-3AF00","canonicalUrl":"https://aoctrl.com/siemens/3RT1035-3AF00","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1035-3AF00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S2 power contactor, 3RT1035-3AF00, screw-type terminals, 35 A AC-4 at 400 V, 18.5 kW AC-2 at 400 V, 55 mm wide, DIN EN 50022 rail mount.","salesMarkdown":"It carries a 35 A AC-4 rating at 400 V — that's the heavy-duty reversing or plugging duty cycle, where the contactor makes and breaks stalled-rotor currents. For the more common AC-2 duty (slip-ring motor starting), it's rated 18.5 kW at 400 V. The 55 mm wide body snaps onto a 35 mm DIN rail per EN 50022, and the screw-type main terminals accept up to 16 mm² stranded wire. ## What the ratings mean in the panel The AC-4 current rating is the one that matters for a reversing starter or a crane hoist — the contactor sees full locked-rotor current on every transition. 35 A at 400 V is roughly a 15 kW motor in that duty. The AC-2 rating (18.5 kW at 400 V) covers slip-ring motor controllers where the starting current is lower. Side-by-side mounting is allowed — no derating gap needed between units on the rail. Coil data: at 50 Hz, the operating range is 0.8 to 1.1 times rated voltage. The contactor is rated for 110 V at 50 Hz. Switching times: 7 to 20 ms for the armature (make/break), with an arcing time of 10 to 15 ms. Auxiliary contact ratings cover 24 V (10 A) through 220 V (0.3 A) — enough for PLC-level signal switching without an interposing relay in most cases.","metaTitle":"Siemens SIRIUS 3RT1035-3AF00 Power Contactor, 35 A AC-4, 18.","metaDescription":"Siemens SIRIUS 3RT1035-3AF00 power contactor, size S2. Rated 35 A AC-4 at 400 V, 18.5 kW AC-2. Screw terminals, DIN rail mount. Current production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"115 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"55 mm","at AC":"7 ... 20 ms","Height":"112 mm","Stranded":"2x (0.75 ... 25 mm²)","at 50 Hz":"0.8 ... 1.1","Arcing Time":"10 ... 15 ms","On The Front":"IP20","1 Rated Value":"50 Hz","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","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 50 Hz rated value":"110 V","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)":"05/01/2012","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","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","reference code according to IEC 81346-2":"Q","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)","apparent holding power of magnet coil at AC":"12.5 VA","apparent pick-up power of magnet coil at AC":"145 VA","Type Of Voltage Of The Control Supply Voltage":"AC","Required Spacing For Grounded Parts At The Side":"6 mm","contact rating of auxiliary contacts according to UL":"A600 / Q600","Inductive Power Factor With Closing Power Of The Coil":"0.79","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.36","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=364121&mlfb=3RT1035-3AF00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1035-3AF00/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1035-3AF00?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"Will 3RT1035-3AF00 drop into a panel wired for 3RT1026-1AB00?","answer":"Both are SIRIUS S2 size contactors with the same 55 mm width and DIN rail footprint, so the mounting and busbar spacing are identical. The main difference is the current rating — the 3RT1035-3AF00 carries a higher AC-4 rating (35 A vs the smaller frame), so it's a functional upgrade if the panel wiring and overload relay are sized for the higher current. Check your wire gauge: the 3RT1035 terminals accept up to 16 mm² stranded."},{"question":"What compliance documentation does Siemens provide for 3RT1035-3AF00?","answer":"RoHS compliance is confirmed with a substance prohibition date of 05/01/2012. The contactor carries IP20 front / IP00 terminal protection. Pollution degree 3 per IEC 60947-1 is specified for industrial environments."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1035-3AF00","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/3RT1035-3AF00 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}}