{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2518-1BJ80","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2518-1BJ80","canonicalUrl":"https://aoctrl.com/siemens/3RT2518-1BJ80","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2518-1BJ80","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2518-1BJ80 contactor, Size S00, 24 VDC coil, screw-type terminals, 45 mm width, 57.5 mm height, 73 mm depth, DIN EN 50022 rail mount.","salesMarkdown":"## DC Switching Capacity — the Real Selection Number The 3RT2518-1BJ80 is a Size S00 SIRIUS contactor from Siemens, and its DC switching ratings are the numbers that decide the fit for most control circuits. At 24 VDC it switches 10 A; at 48 V and 60 V that drops to 2 A, and at 220 VDC it handles only 0.3 A. The 400 VDC rating is 3 A, and at 600 VDC it's down to 0.1 A. That steep derating curve is typical for DC switching — the arc extinguishes less readily than AC, so the contact gap and blowout design govern the maximum current at each voltage. If your BOM calls for switching a 48 VDC solenoid or a 125 VDC brake coil, this contactor's 2 A rating at those voltages is the figure to check against your load's inrush and holding current. ## Mounting and Panel Integration Fastens by screw or snaps onto 35 mm DIN rail per DIN EN 50022. The mounting position is flexible — ±180° rotation on a vertical surface, plus ±22.5° tilt forward or backward. Side-by-side mounting is permitted with zero clearance on all sides (0 mm upwards, forwards, backwards, downwards), and 6 mm at the side. The 45 mm width and 57.5 mm height fit standard panel layout grids. Depth is 73 mm, which clears most enclosure back-panel depths without interference. ## Termination and Wiring Both the main current circuit and the magnet coil use screw-type terminals. The solid or stranded wire capacity is 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm² — enough for control wiring up to 12 AWG. An auxiliary switch is included on the contactor. ## Environmental and Lifecycle Operating temperature range is -25 to +60 °C; storage range is -55 to +80 °C. The contactor is rated for 30,000,000 typical mechanical operations. Electrical life at AC-1 is 1,000,000 operations at maximum switching rate, and at AC duty the maximum switching frequency is 10,000 cycles per hour.","metaTitle":"Siemens 3RT2518-1BJ80 SIRIUS Contactor, Size S00","metaDescription":"Siemens 3RT2518-1BJ80 SIRIUS contactor, Size S00, 24 VDC rated 10 A switching. Screw terminals, DIN rail mount. Current 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 AC":"10 000 1/h","at DC":"7 ... 13 ms","Height":"57.5 mm","Upwards":"0 mm","Forwards":"0 mm","Backwards":"0 mm","Downwards":"0 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"72 V","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","at AC-1 maximum":"1 000 1/h","lifecycle_stage":"current","Auxiliary Switch":"Yes","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Full-Scale Value":"1.1","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","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Product Brand Name":"SIRIUS","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":"2 A","at 220 V rated value":"0.3 A","at 230 V rated value":"10 A","at 400 V rated value":"3 A","at 440 V rated value":"0.8 A","at 600 V rated value":"0.1 A","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","Relative Humidity Minimum":"10 %","per NC contact rated value":"9 A","per NO contact rated value":"16 A","Of Main Circuit Rated Value":"6 kV","Substance Prohibitance (Date)":"10/01/2009","at AWG cables for main contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","Of Auxiliary Circuit Rated Value":"6 kV","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 20A (690V, 100kA)","at 24 V per NC contact rated value":"20 A","at 24 V per NO contact rated value":"20 A","closing power of magnet coil at DC":"4 W","holding power of magnet coil at DC":"4 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","at 110 V per NC contact rated value":"0.175 A","at 110 V per NO contact rated value":"0.35 A","at 220 V per NC contact rated value":"0.375 A","at 220 V per NO contact rated value":"0.75 A","at 230 V per NC contact rated value":"2.2 kW","at 230 V per NO contact rated value":"4 kW","at 400 V per NC contact rated value":"4 kW","at 400 V per NO contact rated value":"7.5 kW","With Type Of Coordination 1 Required":"gG: 35 A (690 V, 100 kA)","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","operational current at AC-12 maximum":"10 A","number of NC contacts for main contacts":"2","number of NO contacts for main contacts":"2","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":"4","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","at ambient temperature 40 °C rated value":"22 A","at ambient temperature 60 °C rated value":"20 A","mirror contact according to IEC 60947-4-1":"Yes; with 3RH29","Type Of Voltage Of The Control Supply Voltage":"DC","for 3-phase AC motor at 460/480 V rated value":"5 hp","for single-phase AC motor at 230 V rated value":"2 hp","Limited To 1 S Switching At Zero Current Maximum":"165 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"165 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","Inductive Power Factor With Closing Power Of The Coil":"0.8","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":"fuse gG: 10 A","minimum cross-section in main circuit at maximum AC-1 rated value":"4 mm²","number of NC contacts for auxiliary contacts instantaneous contact":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0","AWG number as coded connectable conductor cross section for main contacts":"20 ... 12","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000","power loss [W] at AC-3 at 400 V for rated value of the operational current per conductor":"2.2 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0b8c7c3e486b3b5a6eda7f866c61a217.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=360000&mlfb=3RT2518-1BJ80","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2518-1BJ80/alternatives.json"},"ai":{"faq":[{"question":"What is the mounting clearance required for the 3RT2518-1BJ80?","answer":"Zero clearance is required upwards, forwards, backwards, and downwards. Side clearance is 6 mm. Side-by-side mounting is permitted, so you can pack multiple contactors on the same DIN rail without spacing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2518-1BJ80","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/3RT2518-1BJ80 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}}