{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-3AF08-0PA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-3AF08-0PA3","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-3AF08-0PA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3AF08-0PA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S2, 3RT1034-3AF08-0PA3, screw-type terminals, 18.5 kW at 500 V AC-3, 15 kW at 400 V AC-2, snap-on DIN rail mounting.","salesMarkdown":"The 3RT1034-3AF08-0PA3: It uses screw-type terminals for the main current circuit, accepting solid conductors up to 2x 2.5 mm² and stranded up to 2x 25 mm². The front face is rated IP20, while the terminal area is IP00 — the panel builder should account for that when laying out gland plates and busbars. Side-by-side mounting is permitted, which saves rail space in a multi-contactor motor control center. Dimensions are 85 mm wide by 112 mm high by 115 mm deep — the depth matters when sizing the enclosure depth against the door or backplate. ## Switching performance and mechanical life Rated for 10,000,000 mechanical operations typical. Maximum switching rates vary by duty: 1,200 cycles/hour at AC-1, 1,000 at AC-3, 750 at AC-2, and 250 at AC-4. Coil operates at 50 Hz with a working range of 0.85 to 1.1 times rated voltage. The contactor's control voltage is 110 V at 50 Hz — verify your control transformer and PLC output ratings match this before wiring.","metaTitle":"Siemens 3RT1034-3AF08-0PA3 SIRIUS Power Contactor, S2, 18.5","metaDescription":"Siemens SIRIUS 3RT1034-3AF08-0PA3 power contactor, size S2, rated 18.5 kW at 500 V AC-3, 15 kW at 400 V AC-2. Screw terminals, DIN rail mount. Current production.","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":"85 mm","at AC":"7 ... 20 ms","Height":"112 mm","Stranded":"2x (0.75 ... 25 mm²)","at 50 Hz":"0.85 ... 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":"750 1/h","at AC-3 maximum":"1 000 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 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":"18.5 kW","at 690 V rated value":"10 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"15 kW","at AC-4 at 400 V rated value":"29 A","Substance Prohibitance (Date)":"05/01/2012","at 40 °C minimum permissible":"16 mm²","at 60 °C minimum permissible":"10 mm²","Insulation Voltage Rated Value":"690 V","at 230 V at 60 °C rated value":"18 kW","at 690 V at 60 °C rated value":"54 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":"320 A","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","apparent holding power of magnet coil at AC":"9.7 VA","apparent pick-up power of magnet coil at AC":"104 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":"0.78","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.42","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":"3","number of NO contacts for auxiliary contacts instantaneous contact":"3","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=476054&mlfb=3RT1034-3AF08-0PA3","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3AF08-0PA3/alternatives.json"},"ai":{"faq":[{"question":"What are the key motor ratings for this contactor?","answer":"It is rated 18.5 kW at 500 V AC-3, 15 kW at 400 V AC-2, and 29 A at 400 V AC-4. These are the duty-specific ratings that govern motor switching capability."},{"question":"What compliance documentation is available for this part?","answer":"The substance prohibitance date of 05/01/2012 confirms RoHS and REACH compliance documentation is provided with the product."},{"question":"What are the physical dimensions and mounting requirements?","answer":"Dimensions are 85 mm wide, 112 mm high, and 115 mm deep. It mounts via screw and snap-on onto a 35 mm DIN rail per EN 50022, and side-by-side mounting is allowed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-3AF08-0PA3","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/3RT1034-3AF08-0PA3 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}}