{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2045-1SF30","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2045-1SF30","canonicalUrl":"https://aoctrl.com/siemens/3RT2045-1SF30","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2045-1SF30","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S3 power contactor, 3RT2045-1SF30, 83-150 V AC/DC coil, screw-type terminals, auxiliary switch, 70 mm width, 152 mm depth.","salesMarkdown":"## SIRIUS S3 Power Contactor — 3RT2045-1SF30 The coil accepts 83-150 V AC/DC, with a dropout threshold at 80% of rated voltage — meaning it holds in reliably down to about 66 V on a 83 V nominal supply, a useful margin for brownout ride-through. The 70 mm width and 152 mm depth fit standard S3 panel cutouts; clearance requirements are 10 mm upward/downward, 20 mm forward, and 10 mm at the sides. ## Duty Ratings and Switching Frequency The contactor is rated for multiple duty classes with corresponding maximum switching rates: AC-1 (resistive) at 900 operations/hour, AC-2 (slip-ring motor) at 400/h, AC-3 (squirrel-cage motor starting) at 1 000/h, AC-3e at 1 000/h, and AC-4 (plugging/inching) at 300/h. The AC-3 and AC-3e rates are identical, so the part handles standard motor starting and high-efficiency motor profiles at the same cycle rate. Arcing time is 10-20 ms, and the make/close times for both AC and DC coils are 38-57 ms. Typical mechanical endurance is 5 000 000 operations. The MTBF is listed at 52 years — a reliability figure that reflects the contactor's mechanical and electrical design life under normal operating conditions, not a warranty period. For the auxiliary contact set, ratings are 10 A at 24 V, 2 A at 48 V, and 2 A at 60 V; the inrush peak is 20 A. ## Wire and Terminal Specifications Main contact terminals accept solid conductors from 2.5 to 16 mm² and stranded conductors from 6 to 70 mm². The auxiliary contact terminals accept 2x (0.5-1.5 mm²) solid or stranded, or 2x (0.75-2.5 mm²). All terminals are screw-type, requiring a screwdriver for termination — no spring-cage option on this variant.","metaTitle":"Siemens 3RT2045-1SF30 SIRIUS S3 Power Contactor, 83-150 V Co","metaDescription":"Siemens 3RT2045-1SF30 SIRIUS S3 power contactor. 83-150 V AC/DC coil, screw terminals, auxiliary switch. MTBF 52 y. Current lifecycle stage. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"MTBF":"52 y","Depth":"152 mm","Solid":"2.5 ... 16 mm²","Width":"70 mm","at AC":"38 ... 57 ms","at DC":"38 ... 57 ms","Height":"140 mm","Upwards":"10 mm","Forwards":"20 mm","Stranded":"6 ... 70 mm²","at 50 Hz":"2.4 VA","at 60 Hz":"2.4 VA","Downwards":"10 mm","Arcing Time":"10 ... 20 ms","At The Side":"10 mm","Rated Value":"83 ... 150 V","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","at AC-1 maximum":"900 1/h","at AC-2 maximum":"400 1/h","at AC-3 maximum":"1 000 1/h","at AC-4 maximum":"300 1/h","lifecycle_stage":"current","Auxiliary Switch":"Yes","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715","Full-Scale Value":"1.1","at AC-3e maximum":"1 000 1/h","For Main Contacts":"10 ... 2","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)","Product Brand Name":"SIRIUS","Inrush Current Peak":"20 A","Product Designation":"Power contactor","at 24 V rated value":"10 A","at 48 V rated value":"2 A","at 60 V rated value":"2 A","Of Contactor Typical":"5 000 000","at 110 V rated value":"1 A","at 125 V rated value":"0.9 A","at 220 V rated value":"0.3 A","at 230 V rated value":"15 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.8 A","at 480 V rated value":"77 A","at 50 Hz rated value":"83 ... 150 V","at 500 V rated value":"2 A","at 60 Hz rated value":"83 ... 150 V","at 600 V rated value":"62 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","at 1000 V rated value":"37 kW","For Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"7.5 hp","at 200/208 V rated value":"25 hp","at 220/230 V rated value":"30 hp","at 460/480 V rated value":"60 hp","at 575/600 V rated value":"60 hp","Locked-Rotor Current Peak":"2.7 A","Relative Humidity Minimum":"10 %","Holding Current Mean Value":"0.016 A","Of Main Circuit Rated Value":"8 kV","Safe failure fraction (SFF)":"96 %","Safety-Related Switching On":"No","at AC-3 rated value maximum":"1 000 V","at AC in hot operating state":"15.9 W","at AC-2 at 400 V rated value":"37 kW","at AC-3e rated value maximum":"1 000 V","at AC-4 at 400 V rated value":"66 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"01/29/2021","Design Of The Surge Suppressor":"with varistor","Duration Of Inrush Current Peak":"10 µs","Locked-Rotor Current Mean Value":"1.2 A","at AWG cables for main contacts":"2x (10 ... 1/0), 1x (10 ... 2)","Duration Of Locked-Rotor Current":"150 ms","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"110 A","at AC-5b up to 400 V rated value":"80 A","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 160A (690V,100kA), aM: 80A (690V,100kA), BS88: 125A (415V,80kA)","Without Load Current Share Typical":"3.5 W","closing power of magnet coil at DC":"130 W","holding power of magnet coil at DC":"1.8 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","With Type Of Coordination 1 Required":"gG: 250 A (690 V, 100 kA), aM: 160 A (690 V, 100 kA), BS88: 200 A (415 V, 80 kA)","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","category according to EN ISO 13849-1":"2","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"5.3 W","stop category according to EN 60204-1":"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","voltage at PLC-control input rated value":"24 V","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Recovery Time After Power Failure Typical":"2.1 s","mirror contact according to IEC 60947-4-1":"Yes","with low demand rate according to SN 31920":"40 %","safety device type according to IEC 61508-2":"Type B","with high demand rate according to SN 31920":"73 %","Type Of Voltage Of The Control Supply Voltage":"AC/DC","hardware fault tolerance according to IEC 61508":"0","Limited To 1 S Switching At Zero Current Maximum":"1 500 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"1 186 A; Use minimum cross-section acc. to AC-1 rated value","PFHD with high demand rate according to EN 62061":"0.000000077 1/h","Limited To 10 S Switching At Zero Current Maximum":"851 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"538 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"423 A; Use minimum cross-section acc. to AC-1 rated value","SIL Claim Limit (subsystem) according to EN 62061":"2","PFDavg with low demand rate according to IEC 61508":"0.0067","performance level (PL) according to EN ISO 13849-1":"c","type of PLC-control input according to IEC 60947-1":"Type 1","contact rating of auxiliary contacts according to UL":"A600 / P600","Of Main Circuit With Degree Of Pollution 3 Rated Value":"1 000 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"5 000 000","operating range factor of the voltage at PLC-control input":"0.8 ... 1.1","Diagnostics Test Interval By Internal Test Function Maximum":"28 800 s","Of Auxiliary Circuit With Degree Of Pollution 3 Rated Value":"690 V","For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (500 V, 1 kA)","minimum cross-section in main circuit at maximum AC-1 rated value":"50 mm²","number of NC contacts for auxiliary contacts instantaneous contact":"1","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":"https://cdn.aoctrl.com/7d28fa7380658c541019ac8751bc4da6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1413439&mlfb=3RT2045-1SF30","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2045-1SF30/alternatives.json"},"ai":{"faq":[{"question":"What is the MTBF of 3RT2045-1SF30?","answer":"The listed MTBF is 52 years, a reliability figure reflecting the contactor's expected service life under normal operating conditions."},{"question":"What coil voltage does 3RT2045-1SF30 use?","answer":"The coil accepts 83-150 V AC/DC. The dropout threshold is 80% of the rated value, so it holds in reliably down to approximately 66 V on an 83 V nominal supply."},{"question":"Where can I buy 3RT2045-1SF30?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the switching frequency for AC-3 duty on 3RT2045-1SF30?","answer":"The maximum switching rate for AC-3 duty (squirrel-cage motor starting) is 1 000 operations per hour. The AC-3e rating is identical at 1 000/h."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2045-1SF30","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/3RT2045-1SF30 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}}