{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-1AC24","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-1AC24","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-1AC24","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1AC24","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, 3RT1034-1AC24, size S2, 24 V AC 50/60 Hz coil, 15 kW at 400 V AC-2, screw terminals, snap-on DIN rail.","salesMarkdown":"The headline motor rating is 15 kW at 400 V AC-2 duty — that's the current it can make and break for slip-ring motors or moderate-duty starts. For heavier across-the-line starting (AC-3), the same contactor handles 18.5 kW at 500 V and 10 kW at 690 V, so it covers standard 400 V and 690 V industrial networks without derating surprises. The 24 V AC coil draws its holding current from a control transformer, not a DC bus. If your panel runs 24 VDC for PLCs and sensors, you'd need the DC coil variant — this one's for AC control circuits. The coil operates reliably across 0.8 to 1.1 times rated voltage at 50 Hz, and 0.85 to 1.1 at 60 Hz, which gives you some headroom on a long cable run. Electrical life depends on the switching category: at AC-3 you get 1,000 operations per hour, at AC-4 (plugging/reversing) it drops to 250 per hour. Auxiliary contacts are rated for 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V — enough to signal a PLC input or drive a pilot light. The main power circuit uses screw-type terminals, accepting 2x (0.75 to 25 mm²) stranded or 2x (0.5 to 4 mm²) solid, so it handles standard motor cables up to 25 mm² without adapters. Side-by-side mounting is allowed (no derating gap required), which saves rail space in dense panels. The enclosure is IP20 on the front (finger-safe) and IP00 at the terminals — so it's panel-internal only, not for washdown zones. No broker scramble, no surplus hunt — just a standard industrial automation component from a major manufacturer. The closest peer in the evidence set is the 3RT1034-1AN60-1AA0 — same S2 frame, same 15 kW AC-2 rating, but with a 230 V AC coil instead of 24 V. If your control voltage is 230 V (common in North American panels or older European installs), that variant drops in without rewiring the power circuit. The 24 V AC version here is the right pick when your control transformer or PLC output is 24 VAC. ## Deployment context In a typical panel, this contactor sits downstream of a motor circuit breaker or fuse-switch, driving a pump, fan, or small conveyor. The screw terminals and 35 mm DIN rail mount mean a wireman can land it in under five minutes — no special tools beyond a screwdriver and a DIN rail cutter. Storage down to -55 °C is fine for unheated warehouses. Not for outdoor or washdown use without an enclosure.","metaTitle":"Siemens 3RT1034-1AC24 SIRIUS Power Contactor, 24 VAC Coil, 1","metaDescription":"Siemens SIRIUS 3RT1034-1AC24 power contactor, size S2, 24 VAC 50/60 Hz coil. Rated 15 kW at 400 V AC-2. Screw terminals, snap-on DIN rail. Current production. Source via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"164 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":"24 V","at 500 V rated value":"18.5 kW","at 60 Hz rated value":"24 V","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":"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":"320 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":"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=444410&mlfb=3RT1034-1AC24","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1AC24/alternatives.json"},"ai":{"faq":[{"question":"What wire sizes does the screw terminal accept?","answer":"Main terminals accept 2x (0.75 to 25 mm²) stranded or 2x (0.5 to 4 mm²) solid. Auxiliary terminals accept 2x (0.5 to 1.5 mm²) solid or 2x (0.75 to 2.5 mm²) stranded."},{"question":"Can I mount contactors side by side without a gap?","answer":"Yes, side-by-side mounting is allowed with no derating. This saves DIN rail space in dense panels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-1AC24","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/3RT1034-1AC24 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}}