{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2047-3SB30","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2047-3SB30","canonicalUrl":"https://aoctrl.com/siemens/3RT2047-3SB30","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2047-3SB30","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, Size S3, 3RT2047-3SB30, spring-type terminals, coil 21-33 VDC, 52 a MTBF.","salesMarkdown":"Coil acceptance is 21 to 33 VDC; inrush peaks at 2.2 A, then holds at 10 A at 24 V rated value. ## Switching duty and what the frequency ratings mean This contactor is rated for different switching frequencies depending on the load category. At AC-1 (resistive loads) it handles up to 900 operations per hour; at AC-3 (standard squirrel-cage motors) it's good for 850 ops/h. AC-4 (plugging or inching duty) drops to 200 ops/h — that's the limit for frequent reversing or jogging, and exceeding it will cook the arc chamber. The AC-3e rating matches the AC-3 figure, so no derating for the energy-efficient motor curve. Arcing time runs 10 to 20 ms, and the mechanical life is typical at 5 million operations. That MTBF of 52 years is a statistical figure for a controlled environment — in a hot, dusty panel with frequent AC-4 cycles, plan for contact inspection well before that number suggests. Dimensions are 70 mm wide, 140 mm tall, 152 mm deep — that's a compact footprint for a Size S3 contactor. The spring-type terminals on the coil accept 2x (0.5 to 2.5 mm²) solid or stranded; main contact terminals take 2.5 to 16 mm² solid or 6 to 70 mm² stranded.","metaTitle":"Siemens 3RT2047-3SB30 SIRIUS Power Contactor, Size S3, Sprin","metaDescription":"Siemens SIRIUS 3RT2047-3SB30 power contactor, Size S3, spring-type terminals, 21-33 VDC coil, 52 a MTBF. Current production. Quoted on request.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"MTBF":"52 a","Depth":"152 mm","Solid":"2.5 ... 16 mm²","Width":"70 mm","at AC":"38 ... 57 ms","at DC":"38 ... 57 ms","title":"3RT2047-3SB30","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":"21 ... 33 V","description":"power contactor, AC-3e/AC-3, 110 A, 55 kW / 400 V, 3-pole, 21-33 V AC/DC, 50/60 Hz, with integrated varistor, auxiliary contacts: 1 NC, main circuit: screw terminal, control and auxiliary circuit: spring-loaded terminal, size: S3, F-PLC-IN","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Spring-type terminals","at AC-1 maximum":"900 1/h","at AC-2 maximum":"350 1/h","at AC-3 maximum":"850 1/h","at AC-4 maximum":"200 1/h","lifecycle_stage":"current","Auxiliary Switch":"Yes","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715","Full-Scale Value":"1.1","at AC-3e maximum":"850 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 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Inrush Current Peak":"2.2 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":"20 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.8 A","at 480 V rated value":"96 A","at 50 Hz rated value":"21 ... 33 V","at 500 V rated value":"2 A","at 60 Hz rated value":"21 ... 33 V","at 600 V rated value":"99 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":"10 hp","at 200/208 V rated value":"30 hp","at 220/230 V rated value":"40 hp","at 460/480 V rated value":"75 hp","at 575/600 V rated value":"100 hp","Locked-Rotor Current Peak":"6.5 A","Relative Humidity Minimum":"10 %","Holding Current Mean Value":"0.09 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":"23.7 W","at AC-2 at 400 V rated value":"55 kW","at AC-3e rated value maximum":"1 000 V","at AC-4 at 400 V rated value":"97 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"01/29/2021","Design Of The Surge Suppressor":"with varistor","Duration Of Inrush Current Peak":"100 µs","Locked-Rotor Current Mean Value":"4 A","Duration Of Locked-Rotor Current":"150 ms","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"120 A","at AC-5b up to 400 V rated value":"110 A","For Auxiliary And Control Circuit":"spring-loaded terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 200A (690V,100kA), aM: 100A (690V,100kA), BS88: 160A (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":"Spring-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)","category according to EN ISO 13849-1":"2","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"7.9 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)","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 %","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","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":"1 960 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"1 502 A; Use minimum cross-section acc. to AC-1 rated value","PFHD with high demand rate according to EN 62061":"7.7E-8 1/h","Limited To 10 S Switching At Zero Current Maximum":"1 095 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"707 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"562 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,"stockQuantity":0,"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=1413448&mlfb=3RT2047-3SB30"},"ai":{"faq":[{"question":"What is the MTBF of the 3RT2047-3SB30?","answer":"The listed MTBF is 52 years, calculated under typical industrial conditions. Actual service life depends on switching frequency, load category, and ambient temperature."},{"question":"What are the coil voltage requirements for this contactor?","answer":"The coil accepts 21 to 33 VDC. Inrush current peaks at 2.2 A; holding current at 24 VDC is 10 A. Power consumption is 2.4 VA at both 50 Hz and 60 Hz."},{"question":"Where can I buy the 3RT2047-3SB30 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for volume or scheduled delivery."},{"question":"What compliance documentation is available for the 3RT2047-3SB30?","answer":"As a current-production Siemens SIRIUS component, it carries CE marking and is manufactured under IEC/EN 60947-4-1. RoHS and REACH declarations are standard from Siemens for this product family."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2047-3SB30","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/3RT2047-3SB30 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}}