{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1033-1AM20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1033-1AM20","canonicalUrl":"https://aoctrl.com/siemens/3RT1033-1AM20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1033-1AM20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S2 power contactor, 3RT1033-1AM20, 15 kW at AC-2 400 V, screw-type terminals, snap-on 35 mm DIN rail mount, IP20 front.","salesMarkdown":"## SIRIUS S2 power contactor for motor loads and resistive switching The Siemens 3RT1033-1AM20 is a SIRIUS S2-frame power contactor rated for 15 kW at AC-2 duty at 400 V, making it the correct choice for wound-rotor motor switching or slip-ring applications where moderate overcurrent and frequent starts are expected. Screw-type terminals on the main circuit accept stranded wire up to 2x 25 mm², and the auxiliary contacts handle 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V — enough for a control transformer or PLC output interface. ## AC-2 and AC-3 motor switching — what the ratings mean The AC-3 rating (11 kW at 500 V, 9.5 kW at 690 V) covers standard squirrel-cage motors, making and breaking during running. For high-inertia loads or plugging duty, the AC-4 switching frequency is limited to 250 operations per hour, compared to 1 000/h for AC-3 and 1 200/h for AC-1 resistive loads. That frequency ceiling is the real constraint for a machine with rapid cycling — do not exceed it without derating. ## Physical fit and wiring constraints Dimensions are 112 mm height, 55 mm width, 115 mm depth — fits standard 55 mm-wide DIN-rail slot. Front IP20, terminal area IP00. Wire ranges: solid 2x (0.5 … 1.5 mm²) and 2x (0.75 … 2.5 mm²), max 2x (0.75 … 4 mm²); stranded 2x (0.75 … 25 mm²). Pollution degree 3, so suitable for industrial enclosures without additional sealing.","metaTitle":"Siemens 3RT1033-1AM20 SIRIUS S2 Power Contactor, 15 kW at AC","metaDescription":"Siemens SIRIUS S2 power contactor 3RT1033-1AM20, 15 kW at AC-2 400 V, screw terminals, snap-on DIN rail. 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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 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","at 60 Hz":"0.85 ... 1.1","Arcing Time":"10 ... 15 ms","On The Front":"IP20","1 Rated Value":"50 Hz","2 Rated Value":"60 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":"208 V","at 500 V rated value":"11 kW","at 60 Hz rated value":"208 V","at 690 V rated value":"9.5 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":"15.5 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":"15 kW","at 690 V at 60 °C rated value":"40 kW","at AWG cables for main contacts":"2x (18 ... 2)","For Auxiliary And Control Circuit":"screw-type 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 (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":"200 A","Finely Stranded Without Core End Processing":"2x (0.75 ... 16 mm²)","apparent holding power of magnet coil at AC":"11.3 VA","apparent pick-up power of magnet coil at AC":"127 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":"0.73","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.41","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=320397&mlfb=3RT1033-1AM20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1033-1AM20/alternatives.json"},"ai":{"faq":[{"question":"Who supplies 3RT1033-1AM20 and how is it quoted for volume purchases?","answer":"Sourced through independent distribution channels; quoted to order against an RFQ. Availability and current pricing are confirmed at quote time."},{"question":"When sourcing 3RT1033-1AM20, what is the closest functional second-source — 3RT5034-1AR60?","answer":"The 3RT5034-1AR60 is a physically larger S3-frame contactor with a higher AC-3 rating (typically 32 A or 18.5 kW). It will not drop into a panel designed for the S2-frame 3RT1033-1AM20 without rewiring and rail-space changes — the mounting footprint and terminal positions differ."},{"question":"What is 3RT1033-1AM20's listed depth (115 mm) on this component line?","answer":"The depth is 115 mm, which is the dimension from the DIN-rail mounting surface to the farthest point of the contactor body."},{"question":"What is 3RT1033-1AM20's listed solid wire capacity?","answer":"Solid wire: 2x (0.5 … 1.5 mm²), 2x (0.75 … 2.5 mm²), max 2x (0.75 … 4 mm²). Stranded: 2x (0.75 … 25 mm²)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1033-1AM20","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/3RT1033-1AM20 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}}