{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2017-2XF42-0LA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2017-2XF42-0LA2","canonicalUrl":"https://aoctrl.com/siemens/3RT2017-2XF42-0LA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2017-2XF42-0LA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2017-2XF42-0LA2 power contactor, size S00, 72-125 VDC coil, spring-type terminals, 45 mm width, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"## What the 72-125 VDC coil rating means for your control circuit The 3RT2017-2XF42-0LA2: The 72-125 VDC coil on this SIRIUS S00 contactor means the pickup voltage must be at least 0.7× the rated value (about 50 VDC minimum), and the dropout happens at 1.25× the rated value (about 90 VDC). That dropout margin is generous — the contactor stays pulled in through supply dips that would drop a standard 24 VDC coil. Inrush current peaks at 1.1 A, so the DC supply feeding the coil needs to handle that surge without voltage sag. The holding current is lower, but the 1.1 A peak is what the PLC output or relay driving it has to source for the first few milliseconds. ## Panel fit and DIN-rail footprint At 45 mm wide, 70 mm tall, and 73 mm deep, this S00 contactor takes up one standard DIN-rail module position. Clearance requirements: 10 mm above and below the contactor, 10 mm forward, and 6 mm to the sides. These are the minimum air gaps for heat dissipation and arc quenching — pack them tighter and you derate the thermal capacity. No derating needed for odd angles. ## Wire termination and conductor sizing Spring-type terminals on the coil and main contacts mean no screwdriver torqueing — strip the wire, push it in, done. ## Motor load capability and switching duty At 400 V, this contactor switches 3 A — that's about a 1.5 kW motor at 400 V three-phase. At 480 V it handles 11 A, good for about 7.5 hp. At 230 V it's rated 2 hp. These are the AC-3 motor switching ratings — the values that matter for sizing the contactor to the motor full-load current. These are resistive load ratings — inductive DC loads need further derating. AC-4 duty (plugging or inching) is limited to 250 operations per hour maximum. For normal AC-3 motor starting, the mechanical life of 30 million operations means this contactor will outlast the panel it's mounted in. ## Environmental limits and storage That covers most industrial enclosures, including unheated warehouses in cold climates. The arcing time of 10-15 ms and DC dropout time of 25-45 ms are timing specs that matter for coordination with upstream motor circuit protectors.","metaTitle":"Siemens 3RT2017-2XF42-0LA2 SIRIUS Contactor, 72-125 VDC Coil","metaDescription":"Siemens 3RT2017-2XF42-0LA2 SIRIUS power contactor, size S00, 72-125 VDC coil, spring-type terminals, 45 mm wide. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Width":"45 mm","at DC":"25 ... 45 ms","title":"3RT2017-2XF42-0LA2","Height":"70 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"72 ... 125 V","description":"traction contactor, AC-3e/AC-3, 12 A, 5.5 kW / 400 V, 3-pole, 72-125 V DC, 0.7-1.25* Us, electronic drive, with integrated varistor, auxiliary contacts: 1 NC, spring-loaded terminal, size: S00","Initial Value":"0.7","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Spring-type terminals","Type Of Voltage":"DC","at AC-4 maximum":"250 1/h","lifecycle_stage":"current","Auxiliary Switch":"Yes","During Operation":"-40 ... +70 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 50022","Full-Scale Value":"1.25","For Main Contacts":"20 ... 12","Mounting Position":"+/-180° rotation possible on vertical mounting surface, can be tilted forward and backward by +/- 22.5° on vertical mounting surface, standing, on horizontal mounting surface","Size Of Contactor":"S00","Solid Or Stranded":"2x (0,5 ... 4 mm²)","Product Brand Name":"SIRIUS","Inrush Current Peak":"1.1 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":"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","Design Of The Product":"With extended operating range","Instantaneous Contact":"1","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","at AC-2 at AC-3e maximum":"750 1/h","Locked-Rotor Current Peak":"0.04 A","Relative Humidity Minimum":"10 %","Holding Current Mean Value":"7 mA","at maximum Ith rated value":"4 mm²","Of Main Circuit Rated Value":"6 kV","at AC-3 rated value maximum":"690 V","at maximum AC-1 rated value":"4 mm²","at AC in hot operating state":"3.6 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","Substance Prohibitance (Date)":"10/01/2009","Design Of The Surge Suppressor":"with varistor","Duration Of Inrush Current Peak":"50 µs","Locked-Rotor Current Mean Value":"0.04 A","Duration Of Locked-Rotor Current":"250 ms","Of Auxiliary Circuit Rated Value":"6 kV","For Auxiliary And Control Circuit":"spring-loaded terminals","Function Module For Communication":"No","Product Function Bus Communication":"No","With Type Of Assignment 2 Required":"gG NH 3NA, DIAZED 5SB, NEOZED 5SE: 20 A","Without Load Current Share Typical":"0.8 W","closing power of magnet coil at DC":"4.5 W","holding power of magnet coil at DC":"0.75 W","At Contactor For Auxiliary Contacts":"Spring-type terminals","With Type Of Coordination 1 Required":"gG NH 3NA, DIAZED 5SB, NEOZED 5SE: 35 A","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"1.2 W","for AWG cables for auxiliary contacts":"2x (20 ... 12)","number of NC contacts for main contacts":"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 ... 2.5 mm²)","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"No","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 %","number of NC contacts for auxiliary contacts":"1","Type Of Voltage Of The Control Supply Voltage":"DC","up to 40 °C according to IEC 60077 rated value":"22 A","up to 70 °C according to IEC 60077 rated value":"18 A","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 The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","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)","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/18721d8c127b090277dd8c5d89b4342f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=765437&mlfb=3RT2017-2XF42-0LA2"},"ai":{"faq":[{"question":"What does the 72-125 VDC coil rating mean for my control transformer sizing?","answer":"The coil draws a 1.1 A inrush peak at pickup, so the DC supply needs to source that surge. The pickup threshold is 0.7× the rated voltage (about 50 VDC minimum), and dropout happens at 1.25× (about 90 VDC). That wide dropout margin means the contactor stays pulled in through brief supply sags."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2017-2XF42-0LA2","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/3RT2017-2XF42-0LA2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}