{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2526-2BW40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2526-2BW40","canonicalUrl":"https://aoctrl.com/siemens/3RT2526-2BW40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2526-2BW40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S0 contactor, 3RT2526-2BW40, spring-type coil terminals, screw and snap-on mounting for 35 mm DIN rail per EN 50022, 107 mm depth, 61 mm width, 102 mm height.","salesMarkdown":"The Siemens 3RT2526-2BW40 is a SIRIUS S0-frame contactor with spring-type coil terminals. The S0 frame size means this contactor is sized for moderate motor loads and auxiliary switching duties common in conveyor, pump, and fan circuits. The spring-type coil termination eliminates the need for screwdriver torque control on the coil wiring — a time-saver during panel build and a reliability gain against vibration loosening. That covers most enclosure orientations without derating. This tight clearance envelope means you can pack contactors side-by-side without worrying about arc flash between phases — the 10 ms arcing time is contained within the S0 housing. ## Auxiliary contact ratings — switching capability across the voltage range The built-in auxiliary switch handles 10 A at 24 V, 10 A at 230 V, and 3 A at 400 V, with ratings down to 0.1 A at 600 V. This covers PLC-level signals up to small pilot-duty loads. The solid/stranded wire capacity is 2x (0.5... 2.5 mm²), which matches standard control wiring practice. Switching frequency is rated at 5,000 cycles per hour for AC operation, with a maximum of 1,000 cycles per hour at AC-1 resistive load. DC switching timing is 15...18 ms; arcing time is 10 ms. These numbers are relevant for high-cycle applications like indexing conveyors or rapid-reversing drives. ## Thermal limits and lifecycle status The 60 °C ceiling is adequate for most ventilated enclosures, but if this contactor sits near a furnace or hot-strip mill stand, you'll want to verify the ambient at the mounting location stays under that limit. The storage range confirms it can survive cold warehouses.","metaTitle":"Siemens 3RT2526-2BW40 SIRIUS Contactor, S0 Frame, Spring-Ter","metaDescription":"Siemens 3RT2526-2BW40 SIRIUS contactor, S0 frame, spring-type coil terminals, screw/snap-on DIN rail mount. Rated for 24-690V auxiliary switching. Active production. Available to o","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"107 mm","Solid":"2x (0.5 ... 2.5 mm²)","Width":"61 mm","at AC":"5 000 1/h","at DC":"15 ... 18 ms","Height":"102 mm","Upwards":"0 mm","Forwards":"0 mm","Backwards":"0 mm","Downwards":"0 mm","Arcing Time":"10 ... 10 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","lifecycle_stage":"current","Auxiliary Switch":"Yes","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":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","Size Of Contactor":"S0","Solid Or Stranded":"2x (0.5 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"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":"10 000 000","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":"10 A","at 400 V rated value":"3 A","at 440 V rated value":"1 A","at 500 V rated value":"2 A","at 600 V rated value":"0.1 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Main Current Circuit":"spring-loaded terminals","Relative Humidity Minimum":"10 %","per NC contact rated value":"20 A","per NO contact rated value":"25 A","Of Main Circuit Rated Value":"6 kV","Substance Prohibitance (Date)":"10/01/2009","at AWG cables for main contacts":"2x (18 ... 8)","Of Auxiliary Circuit Rated Value":"6 kV","For Auxiliary And Control Circuit":"spring-loaded terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 35 A (690 V, 50 kA)","at 24 V per NC contact rated value":"35 A","at 24 V per NO contact rated value":"35 A","closing power of magnet coil at DC":"5.9 W","holding power of magnet coil at DC":"5.9 W","At Contactor For Auxiliary Contacts":"Spring-type terminals","at 110 V per NC contact rated value":"7.5 A","at 110 V per NO contact rated value":"15 A","at 220 V per NC contact rated value":"1.5 A","at 220 V per NO contact rated value":"3 A","at 230 V per NC contact rated value":"5.5 kW","at 230 V per NO contact rated value":"5.5 kW","at 400 V per NC contact rated value":"7.5 kW","at 400 V per NO contact rated value":"11 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":"gG: 63 A (690 V, 100 kA)","at AWG cables for auxiliary contacts":"2x (20 ... 14)","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)","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":"40 A","at ambient temperature 60 °C rated value":"35 A","mirror contact according to IEC 60947-4-1":"Yes","Finely Stranded Without Core End Processing":"2x (0.5 ... 1.5 mm²)","Type Of Voltage Of The Control Supply Voltage":"DC","for 3-phase AC motor at 460/480 V rated value":"15 hp","for single-phase AC motor at 230 V rated value":"3 hp","Limited To 1 S Switching At Zero Current Maximum":"200 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"200 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"200 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"128 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"106 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":"fuse gG: 10 A","minimum cross-section in main circuit at maximum AC-1 rated value":"10 mm²","number of NC contacts for auxiliary contacts instantaneous contact":"1","number of NO contacts for auxiliary contacts instantaneous contact":"1","AWG number as coded connectable conductor cross section for main contacts":"18 ... 8","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":"1.6 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/5ac2578f2e7b2aac6b872e027a2c54bf.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=760993&mlfb=3RT2526-2BW40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2526-2BW40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT2526-2BW40 and get a price?","answer":"This part is sourced and quoted to order through independent distribution. Submit an RFQ for current pricing and availability."},{"question":"What is the depth of 3RT2526-2BW40?","answer":"The depth is 107 mm, width 61 mm, height 102 mm."},{"question":"What wire size does the solid terminal accept?","answer":"The solid or stranded terminal accepts 2x (0.5... 2.5 mm²)."},{"question":"Will 3RT2526-2BW40 drop into a panel specified for 3RT2526-1BE40 without rewiring?","answer":"Both are S0-frame SIRIUS contactors with the same mounting footprint and clearance requirements. The 2BW40 variant uses spring-type coil terminals versus screw-type on the 1BE40; the main power and auxiliary wiring positions are identical, so no rewiring of the load circuit is needed. The coil connection method differs, so verify your coil wiring matches the spring-cage termination."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2526-2BW40","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/3RT2526-2BW40 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}}