{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1015-1MB41-0KT0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1015-1MB41-0KT0","canonicalUrl":"https://aoctrl.com/siemens/3RT1015-1MB41-0KT0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1015-1MB41-0KT0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1015-1MB41-0KT0, size S00 power contactor, 24 VDC coil, screw terminals, 3 kW at 400 V AC-3, 45 mm width, snap-on DIN rail mount.","salesMarkdown":"## What this contactor is and what it does The Siemens SIRIUS 3RT1015-1MB41-0KT0 is a size S00 power contactor designed for switching 3-phase motor loads up to 3 kW at 400 V in AC-3 duty, or 4 kW at 690 V. The 24 VDC coil draws 1.4 W holding power, so it stays cool in a sealed panel and places minimal load on a 24 VDC supply. Screw-type terminals on both main and auxiliary circuits accept up to 4 mm² stranded or 12 AWG solid, which covers most motor branch wiring up to the contactor's rating. ## Mounting and panel fit Mounts via screw or snap-on onto 35 mm standard mounting rail per DIN EN 50022. The 45 mm width and 57.5 mm height match the S00 footprint, and side-by-side mounting is supported with 6 mm clearance at the side. IP20 on the front and terminals means it's protected against finger contact but needs enclosure for washdown or dust. ## Coordination and protection For Type 2 coordination (no damage to the contactor on a short circuit), use a 20 A gL/gG fuse upstream. For Type 1 coordination (contactor may need replacement after fault), a 35 A gL/gG fuse is sufficient. The pollution degree 3 rating means it's suitable for industrial environments with conductive dust or moisture — typical for control panels in factories.","metaTitle":"Siemens 3RT1015-1MB41-0KT0 SIRIUS Power Contactor, 24 VDC Co","metaDescription":"Siemens SIRIUS 3RT1015-1MB41-0KT0 power contactor, size S00, 24 VDC coil, 3 kW at 400 V AC-3. Current lifecycle stage. Screw terminals, DIN rail mount. Sourced to order against 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","At The Side":"6 mm","Rated Value":"24 V","On The Front":"IP20","Initial Value":"0.82","Of The Terminal":"IP20","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":"2.15","Size Of Contactor":"S00","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","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 400 V rated value":"3 kW","at 500 V rated value":"3.5 kW","at 690 V rated value":"4 kW","Instantaneous Contact":"1","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"3 kW","at AC-4 at 400 V rated value":"6.5 A","at AWG cables for main contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","For Auxiliary And Control Circuit":"screw-type terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 20 A","closing power of magnet coil at DC":"1.4 W","holding power of magnet coil at DC":"1.4 W","reference code acc. to IEC 81346-2":"Q","With Type Of Coordination 1 Required":"fuse gL/gG: 35 A","operational current at AC-12 maximum":"10 A","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","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","at ambient temperature 40 °C rated value":"18 A","Type Of Voltage Of The Control Supply Voltage":"DC","operational current at AC-15 at 230 V rated value":"6 A","operational current at AC-15 at 400 V rated value":"3 A","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","type of connectable conductor cross-sections at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12"}},"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=354354&mlfb=3RT1015-1MB41-0KT0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1015-1MB41-0KT0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative if I need a different coil voltage?","answer":"The 3RT1015-1BB42 uses an AC coil but shares the same S00 frame, screw terminals, and 3 kW at 400 V AC-3 rating. It drops into the same panel footprint without rewiring the power circuit — only the coil supply changes."},{"question":"What are the key ratings for this contactor?","answer":"Rated for 3 kW at 400 V AC-3, 4 kW at 690 V AC-3, and 6.5 A at 400 V AC-4. The coil is 24 VDC, 1.4 W holding power. Type 2 coordination requires a 20 A gL/gG fuse."},{"question":"Will this contactor fit a panel designed for the 3RT1015-1BB42?","answer":"Yes — same S00 size, same 45 mm width, same screw and snap-on DIN rail mount. The power terminals accept the same wire ranges. The only difference is the coil voltage (24 VDC vs AC), so the control wiring needs to match the coil supply."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1015-1MB41-0KT0","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/3RT1015-1MB41-0KT0 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}}