{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1015-1BD42","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1015-1BD42","canonicalUrl":"https://aoctrl.com/siemens/3RT1015-1BD42","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1015-1BD42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, Size S00, 42 VDC coil, screw terminals, 45 mm width, IP20 front.","salesMarkdown":"The coil draws 3.3 W both on pick-up and hold, so the control transformer or DC supply must be sized for continuous 3.3 W draw per contactor. The AC-3 motor-switching capability at 400 V is 3 kW, which covers a standard 4-pole induction motor up to that output; the AC-4 reversing duty rating at 400 V is 6.5 A, meaning frequent jogging or plugging stays within the contactor's thermal limits. For resistive loads (AC-12), the maximum operating current is 10 A. The IP20 finger-safe terminals and front keep live parts protected inside the enclosure, but the contactor itself is not rated for washdown — it belongs in a panel or junction box. ## Switching capacity across voltages The contactor's switching ratings vary by voltage and duty. For DC-13 solenoid loads: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V. For AC-2 slip-ring motor duty at 400 V: 3 kW. For AC-3 squirrel-cage motor duty: 3.5 kW at 500 V, 4 kW at 690 V. For AC-4 reversing duty at 400 V: 6.5 A. The pickup voltage threshold is 0.85 × rated (about 35.7 VDC), and the dropout is 1.1 × rated (about 46.2 VDC) — so a supply dipping below 35.7 V may fail to close the contactor. ## Terminal wiring and short-circuit protection Main current circuit terminals are screw-type, accepting 2 × (0.5 to 1.5 mm²) solid, 2 × (0.75 to 2.5 mm²) stranded, or max 2 × (0.75 to 4 mm²) fine-stranded. AWG equivalents: 2 × (20 to 16), 2 × (18 to 14), and 1 × 12. Type 1 coordination allows a 35 A gL/gG fuse. The degree of pollution is 3 (conductive pollution), so the contactor is suited for industrial environments with occasional condensation.","metaTitle":"Siemens SIRIUS 3RT1015-1BD42 Power Contactor, 42 VDC Coil, S","metaDescription":"Siemens SIRIUS 3RT1015-1BD42 power contactor with 42 VDC coil, Size S00 frame. Rated for AC-3 motor loads. IP20 terminals. Sourced to order against an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"72 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"45 mm","Height":"57.5 mm","Maximum":"2 000 m","At The Side":"6 mm","Rated Value":"42 V","On The Front":"IP20","Initial Value":"0.85","Mounting type":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Of The Terminal":"IP20","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Full-scale value":"1.1","Size of contactor":"S00","Product brand name":"SIRIUS","Degree of pollution":"3","Product designation":"power contactor","at 24 V rated value":"10 A","at 60 V rated value":"2 A","Of Contactor Typical":"30 000 000","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 500 V rated value":"3.5 kW","at 690 V rated value":"4 kW","Instantaneous Contact":"0","Side-by-side mounting":"Yes","For Main Current Circuit":"screw-type terminals","Single Or Multi-Stranded":"2x (0,5 ... 1,5 mm²), 2x (0,75 ... 2,5 mm²), max. 2x (0,75 ... 4 mm²)","at AC-2 at 400 V rated value":"3 kW","at AC-4 at 400 V rated value":"6.5 A","Closing power of magnet coil at DC":"3.3 W","Holding power of magnet coil at DC":"3.3 W","Operating current at AC-12 maximum":"10 A","With Type Of Assignment 2 Required":"fuse gL/gG: 20 A","at AWG conductors for main contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","With Type Of Coordination 1 Required":"fuse gL/gG: 35 A","Reference code acc. to DIN EN 81346-2":"Q","Number of NC contacts for main contacts":"0","Number of NO contacts for main contacts":"3","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","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"screw-type terminals","at ambient temperature 40 °C rated value":"18 A","Type of voltage of the control supply voltage":"DC","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","Of The Contactor With Added Electronics-Compatible 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=10575&mlfb=3RT1015-1BD42","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1015-1BD42/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to the 3RT1015-1BD42?","answer":"The 3RT1015-1BB42 is the closest peer — same Size S00 frame and screw terminals, but with a 24 VDC coil instead of 42 VDC. The mechanical dimensions, terminal capacities, and switching ratings are identical; the only difference is the coil voltage, so a panel wired for 24 VDC control cannot drop in the 1BD42 without a coil-voltage change."},{"question":"What compliance documentation is available for the 3RT1015-1BD42?","answer":"As a Siemens SIRIUS catalog product, the contactor carries CE marking for the European market and is designed to meet IEC 60947-4-1. RoHS and REACH declarations are standard with the shipment. UL and CSA listings are typical for the SIRIUS range, though the specific file number should be confirmed on the nameplate or via the manufacturer's compliance portal."},{"question":"Where can I buy the 3RT1015-1BD42 and how is it quoted?","answer":"The part is sourced to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time; no stock count or lead-time figure is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1015-1BD42","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/3RT1015-1BD42 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}}