{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT7045-1AB00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT7045-1AB00","canonicalUrl":"https://aoctrl.com/siemens/3RT7045-1AB00","factsUrl":"https://aoctrl.com/api/mcp/products/3RT7045-1AB00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S3 contactor, 3RT7045-1AB00, 3-pole main contacts, 24 V AC coil, screw terminals, IP20 front / IP00 terminal, 139 x 70 x 148 mm.","salesMarkdown":"The Siemens 3RT7045-1AB00 is a Size S3 contactor from the SIRIUS family — three main poles, normally open, rated for AC-3 motor switching up to 690 V. The coil pulls in on 24 V AC and holds at 0.26 W DC holding power, so the control transformer sizing is modest. It lands on a 35 mm or 75 mm standard mounting rail via screw or snap-on fastening; the mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward or backward, which gives panel builders flexibility when laying out a crowded door or sub-panel. ## Switching frequency and duty limits The maximum switching rate is 800 operations per hour under AC-3 duty and 250 operations per hour under AC-4. That 250 ops/h limit under AC-4 (plugging / inching) is the one that governs in high-cycle reversing or jogging applications — exceed it and the contactor overheats. For a standard conveyor start or pump run, the AC-3 figure gives comfortable headroom. ## Coordination and environmental fit With Type 1 coordination the upstream fuse is a 200 A gL/gG NH 3NA. The surge voltage withstand is 6 kV, so it holds up in installations with moderate lightning or switching transients on a 400 V supply. Installation altitude is limited to 2 000 m above sea level without derating. ## Auxiliary contacts and PLC compatibility For DC-13 loads at 220 V the auxiliary circuit carries 0.3 A.","metaTitle":"Siemens 3RT7045-1AB00 Contactor, S3, 3-Pole, 24V AC Coil","metaDescription":"Siemens 3RT7045-1AB00 S3 contactor, 3-pole, 24V AC coil, 690V insulation, 6kV surge. Active production. Sourced to order. Panel-mount with screw/snap-on 35/75mm rail.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"139 mm","Width":"70 mm","title":"3RT7045-1AB00","Height":"148 mm","at 50 Hz":"0.27","at 60 Hz":"0.31","description":"Contactor AC-3 80/37kW 400V 24 VAC, 50 Hz 3-pole, Size S3 Screw terminal","On The Front":"IP20","During Storage":"-25 ... +70 °C","Of The Terminal":"IP00","at AC-3 maximum":"800 1/h","at AC-4 maximum":"250 1/h","lifecycle_stage":"current","During Operation":"-10 ... +55 °C","Fastening Method":"screw and snap-on mounting onto 35 mm and 75 mm standard mounting rail","Mounting Position":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","Size Of Contactor":"S3","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Degree Of Pollution":"3","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 50 Hz rated value":"24 V","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","Insulation Voltage Rated Value":"690 V","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","closing power of magnet coil at DC":"0.61 W","holding power of magnet coil at DC":"0.26 W","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"gL/gG NH 3NA: 200 A","shock resistance with sine pulse at AC":"10.6g / 5 ms, 6.2g / 10 ms","number of NC contacts for main contacts":"0","number of NO contacts for main contacts":"3","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":"acceptability for PLC control (17 V, 5 mA)","Type Of Voltage Of The Control Supply Voltage":"AC","operating voltage at AC-3 rated value maximum":"690 V","operational current at DC-13 at 220 V rated value":"0.3 A","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Required Spacing With Side-By-Side Mounting At The Side":"0 mm","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","Connectable Conductor Cross-Section For Main Contacts Finely Stranded With Core End Processing":"50 mm²","Connectable Conductor Cross-Section For Auxiliary Contacts Finely Stranded With Core End Processing":"0.5 ... 2.5 mm²"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/17ab5d89bac41ecbea9dbc6a8ab8514b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1534139&mlfb=3RT7045-1AB00"},"ai":{"faq":[{"question":"What is 3RT7045-1AB00's panel footprint?","answer":"The dimensions are 139 mm depth, 70 mm width, and 148 mm height. It mounts via screw or snap-on onto 35 mm or 75 mm standard mounting rail."},{"question":"Will 3RT7045-1AB00 drop into a panel specified around 3RT6018-1AB02?","answer":"Not without checking the physical envelope. The 3RT7045-1AB00 is a Size S3 frame (139 x 70 x 148 mm), while the 3RT6018-1AB02 is a smaller S0 frame. The mounting rail and screw terminals are the same style, but the S3 occupies more DIN space and may conflict with adjacent devices or gland plates in a panel originally laid out for S0."},{"question":"Where can I buy 3RT7045-1AB00?","answer":"The contactor is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT7045-1AB00","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/3RT7045-1AB00 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}