{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2017-2LB42-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2017-2LB42-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RT2017-2LB42-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2017-2LB42-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling contactor, size S00, 24 V DC coil, spring-type terminals, 3RT2017-2LB42-1AA0.","salesMarkdown":"The 3RT2017-2LB42-1AA0: The 24 V DC coil with spring-type terminals means no screwdriver for the control wiring — strip, push, done. That saves a few minutes per termination on a multi-contactor panel, and spring cages hold better under vibration than screw clamps on a 45 mm wide footprint. ## What the DC switching ratings mean for fit DC arc extinction is the hard part for a contactor, and the datasheet makes it clear: at 24 V rated value it handles 10 A, at 48 V it drops to 2 A, at 125 V it's 0.9 A, and at 230 V it's 0.3 A. If your BOM calls for switching a 48 V DC solenoid bank pulling 1.5 A, this part fits; if the solenoid pulls 3 A, the 2 A limit says no — you need a larger frame or a DC-rated power contactor. The AC-3 motor rating at 400 V is 3 A, and at 230 V it carries 2 hp. That's a small motor — fractional-horsepower pump or a small conveyor section. For a 7.5 kW drive input contactor, this is undersized; for a pilot-duty or coupling application between PLC output and a larger contactor coil, it's right-sized. ## Mechanical endurance and switching frequency Rated at 30,000,000 mechanical operations typical, this contactor will outlast the panel it's in for most cyclic applications. The switching-frequency limits tell the real story: at AC-1 (resistive) you can hammer it at 1,000 cycles per hour, at AC-3 (motor) it's 750 per hour, and at AC-4 (plugging/inching) it's 250 per hour. If your machine cycles a coupling contactor every 3 seconds, the AC-1 limit says fine; if it's reversing a motor every 10 seconds, the AC-4 limit says you'll exceed the rated frequency and should step up to a larger contactor or reduce the duty. ## Panel integration and clearances The 45 mm width is one standard module — you can stack several in a row. That's tight enough for a crowded panel, but the 10 mm forward clearance means you can't butt a gland plate right against the front of the contactor — leave room for the arcing space (arcing time 10 to 15 ms) and for the spring-cage tool access. ## Wiring and temperature range","metaTitle":"Siemens 3RT2017-2LB42-1AA0 SIRIUS Coupling Contactor, S00, 2","metaDescription":"Siemens SIRIUS 3RT2017-2LB42-1AA0 coupling contactor, size S00. 24V DC coil, spring terminals. Rated 10A at 24V DC, 3A at 400V AC. Current production. RFQ for sourcing.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Solid":"0.5 ... 4 mm²","Width":"45 mm","at DC":"7 ... 20 ms","Height":"70 mm","Upwards":"10 mm","Forwards":"10 mm","Stranded":"0.5 ... 4 mm²","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"24 V","Initial Value":"0.7","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Spring-type terminals","at AC-1 maximum":"1 000 1/h","at AC-2 maximum":"750 1/h","at AC-3 maximum":"750 1/h","at AC-4 maximum":"250 1/h","lifecycle_stage":"current","Auxiliary Switch":"No","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":"1.25","at AC-3e maximum":"750 1/h","For Main Contacts":"20 ... 12","Mounting Position":"standing, on horizontal mounting surface","Size Of Contactor":"S00","Solid Or Stranded":"2x (0,5 ... 4 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Coupling 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":"30 000 000","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":"2 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.2 A","at 480 V rated value":"11 A","at 500 V rated value":"2 A","at 600 V rated value":"11 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Auxiliary Contacts":"20 ... 12","For Main Current Circuit":"spring-loaded terminals","at 110/120 V rated value":"0.5 hp","at 200/208 V rated value":"3 hp","at 220/230 V rated value":"3 hp","at 460/480 V rated value":"7.5 hp","at 575/600 V rated value":"10 hp","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"6 kV","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"1.5 W","at AC-2 at 400 V rated value":"5.5 kW","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"8.5 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"10/01/2009","Design Of The Surge Suppressor":"with varistor","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"19.4 A","at AC-5b up to 400 V rated value":"9.9 A","For Auxiliary And Control Circuit":"spring-loaded terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 20A (690V,100kA), aM: 16A (690V, 100kA), BS88: 20A (415V, 80kA)","Without Load Current Share Typical":"2.8 W","closing power of magnet coil at DC":"2.8 W","holding power of magnet coil at DC":"2.8 W","At Contactor For Auxiliary Contacts":"Spring-type terminals","With Type Of Coordination 1 Required":"gG: 50A (690V,100kA), aM: 20A (690V,100kA), BS88: 35A (415V,80kA)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"0.5 W","for AWG cables for auxiliary contacts":"2x (20 ... 12)","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 ... 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)","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)","with high demand rate according to SN 31920":"73 %","Type Of Voltage Of The Control Supply Voltage":"DC","Limited To 1 S Switching At Zero Current Maximum":"200 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"123 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"96 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"74 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"61 A; Use minimum cross-section acc. to AC-1 rated value","contact rating of auxiliary contacts according to UL":"A600 / Q600","Of Main Circuit With Degree Of Pollution 3 Rated Value":"690 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","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":"4 mm²","number of NC contacts for auxiliary contacts instantaneous contact":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c23a98cf0086d6527b1fcbce607a866b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=418282&mlfb=3RT2017-2LB42-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2017-2LB42-1AA0/alternatives.json"},"ai":{"faq":[{"question":"What are the key DC switching ratings for this contactor?","answer":"At 24 V DC it switches 10 A. At 48 V DC it switches 2 A. At 60 V DC it switches 2 A. At 110 V DC it switches 1 A. At 125 V DC it switches 0.9 A. At 220 V DC it switches 0.3 A. These ratings drop sharply with voltage because DC arc extinction is harder at higher voltages."},{"question":"What AC motor rating does this contactor carry?","answer":"At 230 V AC it is rated for 2 hp. At 400 V AC it is rated for 3 A in AC-3 duty. This suits fractional-horsepower motors or coupling applications, not large drives."},{"question":"Does this contactor include an auxiliary switch?","answer":"No, this variant has no auxiliary switch. If you need feedback contacts, you must add a separate auxiliary contact block or select a different order code."},{"question":"What wire sizes does the spring terminal accept?","answer":"Solid or stranded wire from 0.5 to 4 mm². Two conductors of the same cross-section can be terminated together in one terminal."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2017-2LB42-1AA0","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/3RT2017-2LB42-1AA0 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}}