{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1015-2JB42","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1015-2JB42","canonicalUrl":"https://aoctrl.com/siemens/3RT1015-2JB42","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1015-2JB42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1015-2JB42 power contactor, size S00, 24 VDC coil with integrated diode suppression, spring-loaded terminals, 45 mm width, screw and snap-on DIN rail mounting.","salesMarkdown":"At 45 mm wide and 73 mm deep, it fits standard DIN-rail enclosures with typical gland-plate clearance. The spring-loaded terminals on the main current circuit accept 2x (0.25... 2.5 mm²) solid or stranded conductors, or 2x (24... 14) AWG, so no ferrule crimping is required for solid wire — a time saver during panel build. The IP20 finger-safe enclosure on the front and terminals means it can be installed in a standard IP54 or higher cabinet without additional shrouding for the contactor body itself. The magnet coil is rated for 24 V DC and includes an integrated surge suppressor designed as a diode. Closing power is 2.3 W; holding power is also 2.3 W — a continuous-duty coil that stays cool at full rated voltage. The diode polarity must be observed: if the control circuit is driven by a PLC output or relay, verify the free-wheel diode orientation before energizing inductive loads downstream. Switching capacity at 24 V rated value is 10 A, dropping to 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V — these are the DC-13 / resistive load curves for the auxiliary contacts. For the main poles, AC-12 maximum operating current is 10 A. ## Load switching and coordination For motor loads, the contactor is rated at AC-2 3 kW at 400 V and AC-4 6.5 A at 400 V. At 400 V AC-3 duty it switches 3 A, and at 690 V AC-3 it handles 4 kW. Type 2 coordination requires a 20 A gL/gG fuse; Type 1 coordination allows a 35 A gL/gG fuse. For a line-down replacement or a new panel build, confirm the coil voltage (24 V DC) and the spring-loaded terminal preference match your BOM — the -2JB42 suffix encodes both the DC coil and the spring-clamp main terminals.","metaTitle":"Siemens SIRIUS 3RT1015-2JB42 Power Contactor, Size S00, 24 V","metaDescription":"Siemens SIRIUS 3RT1015-2JB42 power contactor, size S00, 24 VDC coil with diode suppression, spring-loaded terminals, 10 A at 24 V. Current lifecycle. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"60 mm","Maximum":"2 000 m","At The Side":"6 mm","Rated Value":"24 V","On The Front":"IP20","Initial Value":"0.7","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":"1.25","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":"spring-loaded terminals","Single Or Multi-Stranded":"2x (0,25 ... 2,5 mm²)","at AC-2 at 400 V rated value":"3 kW","at AC-4 at 400 V rated value":"6.5 A","Design of the surge suppressor":"with diode","Closing power of magnet coil at DC":"2.3 W","Holding power of magnet coil at DC":"2.3 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 (24 ... 14)","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 (0.25 ... 1.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (24 ... 14)","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"spring-loaded terminals","at ambient temperature 40 °C rated value":"18 A","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Type of voltage of the control supply voltage":"DC","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$244.64","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=197073&mlfb=3RT1015-2JB42","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1015-2JB42/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative — 3RT1015-1BB42?","answer":"The 3RT1015-1BB42 is the screw-terminal variant of the same size S00 contactor with a 24 V DC coil but without the integrated diode suppression. The -2JB42 uses spring-loaded terminals and includes the diode. If your panel is wired for screw terminals and you supply external flyback suppression, the -1BB42 drops into the same footprint and DIN rail slot without rewiring the load side."},{"question":"What is the depth of 3RT1015-2JB42?","answer":"The depth is 73 mm, with a width of 45 mm and height of 60 mm."},{"question":"What wire sizes do the spring-loaded terminals accept?","answer":"The spring-loaded terminals on the main current circuit accept 2x (0.25... 2.5 mm²) solid or stranded conductors, or 2x (24... 14) AWG."},{"question":"Will 3RT1015-2JB42 drop into a panel specified for 3RT1015-1BB42 without rewiring?","answer":"Yes, the physical footprint (size S00, 45 mm width, DIN rail snap-on) is identical. The difference is terminal type: the -2JB42 uses spring-loaded terminals, while the -1BB42 uses screw terminals. If the panel already has ring or fork terminals crimped for screw clamps, you may need to change to ferruled or bare wire for the spring cage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1015-2JB42","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/3RT1015-2JB42 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}}