{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT7045-1AL20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT7045-1AL20","canonicalUrl":"https://aoctrl.com/siemens/3RT7045-1AL20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT7045-1AL20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S3 contactor, 3RT7045-1AL20, 3-pole, screw-type terminals, AC control, IP20 front, 690 V rated insulation voltage.","salesMarkdown":"The 3RT7045-1AL20 carries three NO main contacts and zero NC main contacts — a straightforward 3-pole make configuration for switching three-phase loads. The AC-3 maximum operating voltage of 690 V means it can switch motor loads on a 400 V or 690 V line, but the current capability drops with voltage: at 230 V it is rated 6 A, at 400 V it is rated 3 A, and at 690 V it is rated 1 A. For DC switching, the DC-13 rating at 220 V is 0.3 A. The maximum switching frequency is 800 operations per hour in AC-3 and 250 per hour in AC-4 (plugging/inching duty). Side-by-side mounting is permitted with no derating gap required. The contactor is size S3, with dimensions of 70 mm width, 148 mm height, and 139 mm depth — check that the enclosure depth clears the 139 mm plus wiring bend radius. Wire sizes accepted: 2x (0.5 to 1.5 mm²) solid or stranded, and 2x (0.75 to 2.5 mm²) finely stranded with ferrule. Pollution degree 3 (conductive pollution, typical for industrial control panels) is the rated environment.","metaTitle":"Siemens 3RT7045-1AL20 S3 Contactor, 3-Pole, 690V AC-3, Screw","metaDescription":"Siemens 3RT7045-1AL20 S3 contactor, 3-pole, 690V AC-3 max, screw terminals, IP20 front. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"139 mm","Width":"70 mm","title":"3RT7045-1AL20","Height":"148 mm","at 50 Hz":"0.27","at 60 Hz":"0.31","description":"Contactor AC-3 80/37kW 400V 230 VAC, 50/60 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":"230 V","at 60 Hz rated value":"230 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":"0.62 W","holding power of magnet coil at DC":"0.27 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/636880a0a86dd33fa3e32909965b2efc.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1534160&mlfb=3RT7045-1AL20"},"ai":{"faq":[{"question":"What is the depth of the 3RT7045-1AL20?","answer":"The depth is 139 mm. The width is 70 mm and the height is 148 mm."},{"question":"What compliance documentation is available for the 3RT7045-1AL20?","answer":"The evidence does not list specific compliance documents (RoHS, REACH, UL, IEC). The contactor carries a rated insulation voltage of 690 V and surge voltage resistance of 6 kV, and is rated for pollution degree 3, which are IEC 60947-4-1 parameters. For formal declarations, request the manufacturer's certificate of conformity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT7045-1AL20","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/3RT7045-1AL20 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}}