{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2015-2BW42","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2015-2BW42","canonicalUrl":"https://aoctrl.com/siemens/3RT2015-2BW42","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2015-2BW42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S00, 3RT2015-2BW42, 48 V DC coil, spring-type terminals, 3-pole, 20-12 A main contacts.","salesMarkdown":"It carries a 48 V DC coil with spring-type terminals, so no screwdriver needed for the coil wiring — just strip and push. The main contacts are rated for 20 A down to 12 A, covering small motors, pumps, conveyors, and lighting banks up to that range. It snaps onto a 35 mm DIN rail per DIN EN 60715, and the mounting position allows ±180° rotation on a vertical surface plus ±22.5° tilt forward/backward, which gives flexibility in tight enclosures. The headline switching capacity at 24 V DC is 10 A, but at 48 V DC it drops to 2 A — that's the DC arc extinction limit in the S00 frame. At 400 V AC it handles 3 A, and at 230 V AC it's rated 0.75 hp, which lines up with fractional-horsepower motor duty. The AC-3 (motor start/run) switching frequency maxes out at 750 operations per hour, while AC-4 (inching/plugging) is limited to 250 per hour — so if your application does frequent reversing or jogging, stay under that 250/h ceiling or the contactor will overheat. AC-1 resistive loads can cycle at 1000/h. That's standard for S00 contactors, but verify your ferrule sizes if you're using stranded with ferrules — the spring cage works best with stripped solid or ferruled stranded at the right strip length. No end-of-life notice or last-time-buy date is attached to this variant. If your panel was specified around the 3RT2015-2BF42 (which uses screw-type terminals instead of spring-type), the 2BW42 will drop into the same footprint — same S00 frame, same DIN rail clip, same 73 x 45 x 70 mm envelope. The only difference is the coil connection method, so no rewiring of the main power circuit is needed; just adapt the coil wiring to the spring cage. For a line-down swap, that means you can substitute without re-drilling or re-laying out the panel. ## Integration Notes The auxiliary switch is present on this unit, so you get one NO + one NC for status feedback or interlocking without adding a separate block.","metaTitle":"Siemens 3RT2015-2BW42 SIRIUS Power Contactor, S00, 48 V DC C","metaDescription":"Siemens 3RT2015-2BW42 SIRIUS power contactor, size S00, 48 V DC coil, spring-type terminals, 3-pole, 20-12 A main contacts, current lifecycle status. Sourced to order. Depth 73 mm.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Solid":"0.5 ... 4 mm²","Width":"45 mm","at DC":"7 ... 13 ms","Height":"70 mm","Upwards":"10 mm","Forwards":"10 mm","Stranded":"0.5 ... 4 mm²","Downwards":"10 mm","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":"Spring-type terminals","at AC-1 maximum":"1 000 1/h","at AC-2 maximum":"750 1/h","at AC-3 maximum":"750 1/h","at AC-4 maximum":"250 1/h","lifecycle_stage":"current","Auxiliary Switch":"Yes","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715","Full-Scale Value":"1.1","at AC-3e maximum":"750 1/h","For Main Contacts":"20 ... 12","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 ... 4 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Power 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":"0.9 A","at 220 V rated value":"0.3 A","at 230 V rated value":"0.75 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.14 A","at 480 V rated value":"4.8 A","at 500 V rated value":"2 A","at 600 V rated value":"6.1 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Auxiliary Contacts":"20 ... 12","For Main Current Circuit":"spring-loaded terminals","at 110/120 V rated value":"0.25 hp","at 200/208 V rated value":"1.5 hp","at 220/230 V rated value":"2 hp","at 460/480 V rated value":"3 hp","at 575/600 V rated value":"5 hp","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"6 kV","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"0.6 W","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"6.5 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"10/01/2009","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"15.8 A","at AC-5b up to 400 V rated value":"5.8 A","For Auxiliary And Control Circuit":"spring-loaded terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 20A (690V,100kA), aM: 16A (690V, 100kA), BS88: 20A (415V, 80kA)","Without Load Current Share Typical":"4 W","closing power of magnet coil at DC":"4 W","holding power of magnet coil at DC":"4 W","At Contactor For Auxiliary Contacts":"Spring-type terminals","With Type Of Coordination 1 Required":"gG: 35A (690V,100kA), aM: 20A (690V,100kA), BS88: 35A (415V,80kA)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"0.2 W","for AWG cables for auxiliary contacts":"2x (20 ... 12)","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"2x (0.5 ... 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)","mirror contact according to IEC 60947-4-1":"Yes","with low demand rate according to SN 31920":"40 %","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","with high demand rate according to SN 31920":"73 %","Type Of Voltage Of The Control Supply Voltage":"DC","Limited To 1 S Switching At Zero Current Maximum":"120 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"86 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"67 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"52 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"43 A; Use minimum cross-section acc. to AC-1 rated value","contact rating of auxiliary contacts according to UL":"A600 / Q600","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":"gG: 10 A (500 V, 1 kA)","minimum cross-section in main circuit at maximum AC-1 rated value":"2.5 mm²","number of NC contacts for auxiliary contacts instantaneous contact":"1","Of The Contactor With Added Electronically Optimized 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=64647&mlfb=3RT2015-2BW42","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2015-2BW42/alternatives.json"},"ai":{"faq":[{"question":"What replaces the 3RT2015-2BW42 if it becomes obsolete?","answer":"No official successor is listed in the lifecycle data. The closest functional peer is the 3RT2015-2BF42, which uses screw-type coil terminals instead of spring-type but shares the same S00 frame, same 48 V DC coil rating, and same main contact ratings."},{"question":"Will the 3RT2015-2BW42 fit a panel designed for the 3RT2015-2BF42?","answer":"Yes, both are S00 frame size with identical dimensions (73 mm depth, 45 mm width, 70 mm height) and mount on 35 mm DIN rail. The only difference is the coil terminal type — spring-type on the 2BW42 versus screw-type on the 2BF42 — so the main power circuit wiring is a direct drop-in."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2015-2BW42","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/3RT2015-2BW42 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}}