{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1535-1BW40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1535-1BW40","canonicalUrl":"https://aoctrl.com/siemens/3RT1535-1BW40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1535-1BW40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1535-1BW40, S2 frame, 48 V DC coil, screw-type terminals, 40 A rated auxiliary contacts, 6 kV impulse voltage withstand.","salesMarkdown":"The coil is rated 48 V DC, with screw-type terminals. Switching capacity varies by voltage: at 24 V DC it handles 10 A, at 60 V DC it drops to 2 A, at 110 V DC it's 1 A, at 220 V DC it's 0.3 A. For AC loads: 230 V AC at 6 A, 400 V AC at 3 A, 440 V AC at 1 A. These are the numbers that decide whether this contactor can handle your specific load — don't just look at the max rating, match the voltage column. Auxiliary contacts are rated 40 A per NC and per NO contact — that's the same rating for both, so you don't have to derate the NC side. If your panel sits in a non-conditioned space that sees summer heat, the +60 °C operating limit is the one to watch — derate switching capacity above 40 °C per the thermal curve. Main circuit terminals are screw-type, accepting solid wire: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). AWG for main contacts is 2x (18 to 2). Auxiliary and control circuits also use screw terminals — consistent termination throughout, no mix of spring and screw. Side-by-side mounting is allowed, with a 6 mm gap at the side for airflow. That's tight enough for dense panels but leaves room for heat dissipation from the coil. RoHS compliance date is May 1, 2012, meaning it meets the EU RoHS directive for substances of concern. No UL or CSA marks are listed in the available data, but the SIRIUS series typically carries IEC certifications for global use — verify with your local Siemens representative for specific market approvals.","metaTitle":"Siemens 3RT1535-1BW40 SIRIUS Power Contactor, S2 Frame, 48 V","metaDescription":"Siemens SIRIUS 3RT1535-1BW40 power contactor, S2 size, 48 V DC coil, screw terminals, 40 A auxiliary contacts, 6 kV rated impulse voltage. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"130 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"73 mm","at DC":"15 ... 30 ms","Height":"112 mm","Stranded":"2x (0.75 ... 25 mm²)","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"48 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","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":"with vertical mounting surface +/-180° rotatable, with vertical mounting surface +/- 30° tiltable to the front and back","Size Of Contactor":"S2","Solid Or Stranded":"2x (0,5 ... 1,5 mm²), 2x (0,75 ... 2,5 mm²), max. 2x (0,75 ... 4 mm²)","Product Brand Name":"SIRIUS","Product Designation":"power contactor","at 24 V rated value":"10 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.3 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 440 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","per NC contact rated value":"40 A","per NO contact rated value":"40 A","Of Main Circuit Rated Value":"6 kV","Substance Prohibitance (Date)":"05/01/2012","at AWG cables for main contacts":"2x (18 ... 2)","Of Auxiliary Circuit Rated Value":"6 kV","For Auxiliary And Control Circuit":"screw-type terminals","at DC at 24 V maximum permissible":"0.038 A","With Type Of Assignment 2 Required":"fuse gL/gG: 80 A","at 24 V per NC contact rated value":"50 A","at 24 V per NO contact rated value":"50 A","closing power of magnet coil at DC":"13.3 W","holding power of magnet coil at DC":"13.3 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","at 110 V per NC contact rated value":"12.5 A","at 110 V per NO contact rated value":"25 A","at 220 V per NC contact rated value":"2.5 A","at 220 V per NO contact rated value":"5 A","at 230 V per NC contact rated value":"9.5 kW","at 230 V per NO contact rated value":"9.5 kW","at 400 V per NC contact rated value":"18.5 kW","at 400 V per NO contact rated value":"18.5 kW","at 440 V per NC contact rated value":"0.135 A","at 440 V per NO contact rated value":"0.27 A","With Type Of Coordination 1 Required":"fuse gL/gG: 160 A","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 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":"60 A","at ambient temperature 60 °C rated value":"55 A","Finely Stranded Without Core End Processing":"2x (0.75 ... 16 mm²)","Type Of Voltage Of The Control Supply Voltage":"DC","for 3-phase AC motor at 460/480 V rated value":"25 hp","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 gL/gG: 10 A","minimum cross-section in main circuit at maximum AC-1 rated value":"16 mm²","number of NC contacts for auxiliary contacts instantaneous contact":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0","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":"2.6 W"}},"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=173679&mlfb=3RT1535-1BW40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1535-1BW40/alternatives.json"},"ai":{"faq":[{"question":"What wire sizes does this contactor accept?","answer":"Main circuit screw terminals accept solid wire: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded wire: 2x (0.75 to 25 mm²). AWG for main contacts: 2x (18 to 2). Auxiliary and control circuits also use screw terminals."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1535-1BW40","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/3RT1535-1BW40 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}}