{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2526-1BM40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2526-1BM40","canonicalUrl":"https://aoctrl.com/siemens/3RT2526-1BM40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2526-1BM40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2526-1BM40, Size S0 contactor, 220 V AC 50/60 Hz coil, screw-type terminals, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"Rated switching capacity varies by load voltage: 10 A at 24 V DC, 10 A at 230 V AC, 3 A at 400 V AC, and 0.3 A at 220 V DC — the DC curve drops fast above 60 V, so watch your inductive DC loads. Mechanical life is 10,000,000 operations typical; electrical switching frequency maxes at 5,000 cycles per hour on AC duty, 1,000 per hour at AC-1 maximum. ## Panel Fit and Clearances Dimensions are 85 mm high, 61 mm wide, 107 mm deep — the 107 mm depth is the dimension to watch when spacing against a gland plate or back panel. Minimum clearance to adjacent components: 0 mm upwards, forwards, and backwards; 6 mm at the sides. That zero-clearance on three faces means you can pack contactors tight in a row, but the 6 mm side gap is mandatory for arc flash containment. Handy for angled subpanels or tight enclosures. Screw-type terminals accept solid or stranded wire: 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²). That covers standard control wiring up to 14 AWG; no ferrule requirement for stranded, but ferrules help in repeated disconnect scenarios. An auxiliary switch is included (yes), so you get a built-in feedback contact for PLC input or status lamp without bolting on a separate block. ## Environmental Range Arcing time is 10 to 10 ms — consistent, short arc extinction for a contactor this size, which helps with contact life in inductive switching.","metaTitle":"Siemens 3RT2526-1BM40 SIRIUS Contactor, Size S0, 220 V Coil,","metaDescription":"Siemens 3RT2526-1BM40 SIRIUS contactor, Size S0, 220 V AC coil, screw terminals. Rated for 10 A at 24 V, 10 A at 230 V. DIN rail mount. Current lifecycle stage. Sourced to order.","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":"220 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=94489&mlfb=3RT2526-1BM40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2526-1BM40/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of the 3RT2526-1BM40?","answer":"The depth is 107 mm. That is the dimension to check against your enclosure depth or gland plate clearance."},{"question":"What wire sizes does the 3RT2526-1BM40 accept?","answer":"Screw terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded wire."},{"question":"Will the 3RT2526-1BM40 drop into a panel specified for the 3RT2526-1BG40 without rewiring?","answer":"Both are Size S0 contactors with the same footprint and DIN rail mount, so mechanical fit is identical. The difference is the coil voltage — the 1BM40 has a 220 V AC coil; the 1BG40 uses a different coil voltage. Verify coil supply before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2526-1BM40","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/3RT2526-1BM40 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}}