{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2018-1XF41-0LA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2018-1XF41-0LA2","canonicalUrl":"https://aoctrl.com/siemens/3RT2018-1XF41-0LA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2018-1XF41-0LA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2018-1XF41-0LA2, size S00 contactor, 72-125 V DC coil, screw-type terminals, 45 mm width, 73 mm depth, 58 mm height.","salesMarkdown":"It switches motor loads up to 2 hp at 230 V and carries 14 A at 480 V — the AC-3 motor rating governs the real-world duty, not the resistive curve. The coil draws a 1.1 A inrush peak and holds at 0.7 times the rated voltage, dropping out at 1.25 times the rated value. That wide dropout margin means it stays closed through brief sags common on DC control buses fed by unregulated rectifiers. Size S00 is the smallest SIRIUS frame — 45 mm wide, 58 mm tall, 73 mm deep — and mounts via screw or snap-on onto a 35 mm DIN rail per EN 50022. That compact footprint and generous position tolerance make it a candidate for dense panels where every millimeter of DIN rail is allocated. The contactor is rated for DC switching across the coil voltage range: 10 A at 24 V DC, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V. On the AC side, it delivers 3 A at 400 V, 14 A at 480 V, 2 A at 500 V, and 11 A at 600 V. The 2 hp rating at 230 V is the motor-starting figure — the AC-4 maximum switching rate of 250 operations per hour sets the ceiling for plugging or inching duty. Arcing time runs 10-15 ms, and the DC switching time is 25-45 ms. For a sourcing decision, the 14 A at 480 V and 2 hp at 230 V are the load-bearing numbers for typical three-phase motor circuits. The auxiliary switch is integrated (yes), and the main contact rating is listed as 20-12. Mechanical life is typical 30,000,000 operations. These numbers confirm the contactor is rated for industrial enclosures without forced cooling, even in cold environments like unheated warehouses. ## Wiring and terminal details The coil terminals are screw-type. The main and auxiliary terminals accept solid or stranded conductors: 2x (0.5-1.5 mm²), 2x (0.75-2.5 mm²), or 2x 4 mm². That covers most control-circuit wiring up to 4 mm² — typical for motor starters up to 2 hp. The screw terminals are field-friendly for panel builders who prefer traditional termination over spring-cage.","metaTitle":"Siemens 3RT2018-1XF41-0LA2 SIRIUS Contactor, 72-125 V DC Coi","metaDescription":"Siemens SIRIUS 3RT2018-1XF41-0LA2 contactor, size S00, 72-125 V DC coil, screw terminals. Rated 10 A at 24 V DC, 14 A at 480 V. Current lifecycle stage. 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","Height":"58 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","Initial Value":"0.7","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-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 standard mounting 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 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Product Brand Name":"SIRIUS","Inrush Current Peak":"1.1 A","Product Designation":"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 480 V rated value":"14 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":"screw-type terminals","at 110/120 V rated value":"1 hp","at 200/208 V rated value":"3 hp","at 220/230 V rated value":"5 hp","at 460/480 V rated value":"10 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 %","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":"6.6 W","at AC-2 at 400 V rated value":"7.5 kW","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"11.5 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","at AWG cables for main contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","Duration Of Locked-Rotor Current":"250 ms","Of Auxiliary Circuit Rated Value":"6 kV","For Auxiliary And Control Circuit":"screw-type 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":"Screw-type terminals","With Type Of Coordination 1 Required":"gG NH 3NA, DIAZED 5SB, NEOZED 5SE: 35 A","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"2.2 W","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 ... 1.5 mm²), 2x (0.75 ... 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 %","with high demand rate according to SN 31920":"73 %","number of NO 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":"300 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"169 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"128 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"92 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"74 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,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1477278&mlfb=3RT2018-1XF41-0LA2","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2018-1XF41-0LA2/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT2018-1XF41-0LA2 and what is the lead time?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or lead-time number is published here."},{"question":"What is the coil voltage and type for this contactor?","answer":"The coil is DC, rated 72-125 V DC. Pick-up voltage is 0.7 times the rated value; drop-out voltage is 1.25 times the rated value."},{"question":"What are the key switching ratings for 3RT2018-1XF41-0LA2?","answer":"At 24 V DC it switches 10 A; at 480 V AC it switches 14 A; at 230 V AC it is rated for 2 hp motor load. The AC-4 maximum switching rate is 250 operations per hour."},{"question":"What is the mounting and clearance requirement?","answer":"It mounts via screw or snap-on onto a 35 mm DIN rail per EN 50022. Clearances needed: 10 mm upwards, forwards, and downwards; 6 mm at the side."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2018-1XF41-0LA2","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/3RT2018-1XF41-0LA2 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}}