{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2526-1BW40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2526-1BW40","canonicalUrl":"https://aoctrl.com/siemens/3RT2526-1BW40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2526-1BW40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, contactor, size S0, 3RT2526-1BW40, 24 V DC coil, 10 A rated at 24 V, screw-type terminals, snap-on DIN rail mounting.","salesMarkdown":"## Siemens 3RT2526-1BW40 SIRIUS Contactor — Size S0, 24 V DC Coil It carries a 24 V DC coil and is rated to switch 10 A at 24 V DC, with a broader DC switching capability across voltages up to 690 V — for instance, 2 A at 48 V, 1 A at 110 V, and 0.3 A at 220 V. The AC-1 resistive load rating reaches 10 A at 230 V and 3 A at 400 V, making it suitable for smaller motor and heater circuits within its contactor class. The S0 footprint measures 85 mm high by 61 mm wide by 107 mm deep, so it fits standard panel layouts. Clearance requirements are minimal — 6 mm at the sides, zero mm upwards, forwards, and backwards. The screw-type coil terminals accept 2x (0.5 to 1.5 mm²) solid or 2x (0.75 to 2.5 mm²) stranded wire, which covers typical control wiring. ## Switching Performance and Ratings Rated for 5 000 switching operations per hour on AC loads, and 1 000 per hour at AC-1 maximum. DC switching has an arcing time of 10 ms and a dropout delay of 15 to 18 ms. The coil hold-in voltage is 0.8 of rated value, dropout at 1.1 of rated value.","metaTitle":"Siemens 3RT2526-1BW40 SIRIUS Contactor, S0 Size, 24V 10A","metaDescription":"Siemens SIRIUS 3RT2526-1BW40 contactor, size S0. Rated 10A at 24V DC. Screw terminals, DIN rail mount. Current lifecycle. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"107 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Width":"61 mm","at AC":"5 000 1/h","at DC":"15 ... 18 ms","Height":"85 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":"Screw-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 DIN 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 ... 1.5 mm²), 2x (0.75 ... 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":"screw-type 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","Of Auxiliary Circuit Rated Value":"6 kV","For Auxiliary And Control Circuit":"screw-type 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":"Screw-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 ... 16), 2x (18 ... 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), 2x (0.75 ... 2.5 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","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":"16 ... 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":"$72.39","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=265023&mlfb=3RT2526-1BW40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2526-1BW40/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RT2526-1BW40?","answer":"Submit an RFQ through the storefront. The part is sourced to order through independent distribution; pricing and stock levels are confirmed at quote time."},{"question":"What is 3RT2526-1BW40's listed depth?","answer":"The depth is 107 mm, with a width of 61 mm and height of 85 mm — the S0 frame size."},{"question":"What wire sizes does the 3RT2526-1BW40 accept?","answer":"The screw-type terminals accept 2x (0.5 to 1.5 mm²) solid or 2x (0.75 to 2.5 mm²) stranded wire."},{"question":"Will 3RT2526-1BW40 drop into a panel specified around 3RT2526-1BE40 without rewiring?","answer":"Both are S0 frame contactors with the same 85 x 61 x 107 mm footprint and DIN rail mounting, so the physical swap is direct. The difference is the coil — 3RT2526-1BW40 uses a 24 V DC coil, while 3RT2526-1BE40 uses a different coil voltage. Verify the control voltage matches before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2526-1BW40","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/3RT2526-1BW40 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}}