{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2018-4BB41","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2018-4BB41","canonicalUrl":"https://aoctrl.com/siemens/3RT2018-4BB41","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2018-4BB41","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2018-4BB41, size S00 power contactor, 24 VDC coil, screw and snap-on mounting on 35 mm DIN rail, 45 mm width, 73 mm depth.","salesMarkdown":"The 24 VDC coil pulls in at 0.8 of rated voltage and holds reliably; the ring-cable-lug connection on the magnet coil means you torque a ring terminal, not a spade, so it wires up clean on the coil terminals. The S00 frame is the smallest Siemens contactor size, so it fits where a larger frame won't. ## Switching performance and mechanical life Rated for 1 000 1/h at AC-1, 750 1/h at AC-3, and 250 1/h at AC-4. Mechanical life of the contactor is typical 30 000 000 operations — that's the no-load mechanical endurance, not the electrical endurance under load. ## Coil and contact ratings Coil rated 24 VDC with a pickup of 0.8 x rated value. The contact ratings span a wide voltage range: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, 0.2 A at 440 V, 14 A at 480 V, 2 A at 500 V, and 11 A at 600 V. The 480 V and 600 V figures are the higher-current paths — useful for 480 V motor circuits common in North American panels. The 2 hp rating at 230 V gives a quick motor-size reference for single-phase loads.","metaTitle":"Siemens 3RT2018-4BB41 SIRIUS Contactor, S00, 24 VDC coil, 45","metaDescription":"Siemens SIRIUS 3RT2018-4BB41 power contactor, size S00, 24 VDC coil, 45 mm width, 73 mm depth. Screw and snap-on mounting on 35 mm DIN rail. Current lifecycle stage. Sourced to ord","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Width":"45 mm","at DC":"7 ... 13 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":"24 V","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Ring cable lug connection","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":"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":"750 1/h","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":"S00","Product Brand Name":"SIRIUS","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":"14 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 Main Current Circuit":"Ring cable lug connection","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","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":"3 W","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"11.5 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"10/01/2009","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":"13.2 A","For Auxiliary And Control Circuit":"ring terminal lug connection","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 25A (690V,100kA), aM: 20A (690V,100kA), BS88: 25A (415V,80kA)","Without Load Current Share Typical":"4 W","closing power of magnet coil at DC":"4 W","holding power of magnet coil at DC":"4 W","At Contactor For Auxiliary Contacts":"Ring cable lug connection","With Type Of Coordination 1 Required":"gG: 50A (690V,100kA), aM: 25A (690V,100kA), BS88: 50A (415V,80kA)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"1 W","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","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 3RH29","with low demand rate according to SN 31920":"40 %","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":"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)","minimum cross-section in main circuit at maximum AC-1 rated value":"4 mm²","number of NO contacts for auxiliary contacts instantaneous contact":"1","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/d79e69cfdecf80dacbb2781d4bbbf328.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=327144&mlfb=3RT2018-4BB41","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2018-4BB41/alternatives.json"},"ai":{"faq":[{"question":"Who supplies 3RT2018-4BB41 and how is it quoted for volume?","answer":"This part is sourced through independent distribution and quoted to order against an RFQ. Volume pricing and lead time are confirmed at quote time; no stock count or price is listed here."},{"question":"What is the closest functional second-source for 3RT2018-4BB41?","answer":"The 3RT2015-4BB41 is the nearest functional peer in the same SIRIUS S00 family with a 24 VDC coil. It shares the same 45 mm width and 73 mm depth, so it drops into the same DIN rail footprint without rewiring. The key difference is the current rating: the 3RT2015-4BB41 is a lower-rated frame, so verify your load current before substituting."},{"question":"What are the mounting clearances for 3RT2018-4BB41?","answer":"Minimum air clearances are 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side. The contactor mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2018-4BB41","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/3RT2018-4BB41 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}}