{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2526-2BB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2526-2BB40","canonicalUrl":"https://aoctrl.com/siemens/3RT2526-2BB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2526-2BB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, size S0 contactor, 24 VDC coil, spring-type terminals, screw and snap-on 35 mm DIN rail mounting, 10 A auxiliary contact at 24 V.","salesMarkdown":"It is a current-production part, so you are not hunting for NOS or surplus — it is a standard catalog line. The S0 frame means it handles moderate motor and resistive loads in a compact footprint (61 mm wide, 102 mm high, 107 mm deep). The spring-type coil terminals save panel-build time versus screw-clamp — no torque driver needed on the coil circuit. Mounting is screw-and-snap onto 35 mm DIN rail per DIN EN 50022, with ±180° rotation possible on a vertical surface and ±22.5° tilt forward/backward. That gives you flexibility in tight enclosures without custom brackets. ## Auxiliary contact ratings — the real switching limits The built-in auxiliary switch is rated 10 A at 24 V and 230 V AC, but drops to 2 A at 48 V DC and 0.1 A at 600 V. The DC derating is steep — if you are switching a 48 VDC pilot light or solenoid, the 2 A limit is the one that governs, not the 10 A AC figure. At 110 VDC the rating is 1 A, and at 220 VDC it drops to 0.3 A. For any DC control circuit above 24 V, check the voltage-specific row — the AC-1 style rating does not carry over. If you are comparing it to the 3RT2535-1AD00 (a larger-frame SIRIUS contactor), the 3RT2526-2BB40 will not drop into the same panel footprint without rewiring — the S0 frame is physically smaller and the terminal layout differs. Stick with the S0 frame for a direct swap. ## Integration notes The contactor accepts 2x (0.5 to 2.5 mm²) solid or stranded wire on the spring terminals. Strip length is standard for cage-clamp style — 8 to 10 mm. No ferrule required but recommended for stranded in high-vibration panels. The 0 mm clearance to adjacent devices on all sides except the side (6 mm) means you can pack S0 contactors tightly in a row for multi-motor groups.","metaTitle":"Siemens 3RT2526-2BB40 SIRIUS Contactor, S0 Frame, 24 VDC Coi","metaDescription":"Siemens SIRIUS 3RT2526-2BB40 contactor, size S0, 24 VDC coil with spring-type terminals. Current production. DIN rail mount. Auxiliary switch included. 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 ... 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":"24 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 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 ... 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","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":"$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=394601&mlfb=3RT2526-2BB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2526-2BB40/alternatives.json"},"ai":{"faq":[{"question":"Will the 3RT2526-2BB40 drop into a panel specified for the 3RT2535-1AD00?","answer":"No. The 3RT2526-2BB40 is an S0 frame contactor, while the 3RT2535-1AD00 is a larger frame size. The mounting footprint, terminal layout, and dimensions differ — rewiring and possibly re-drilling the panel are required."},{"question":"What is the depth of the 3RT2526-2BB40?","answer":"The depth is 107 mm. Overall dimensions are 61 mm wide by 102 mm high by 107 mm deep."},{"question":"What wire sizes does the spring terminal accept?","answer":"The spring-type terminals accept 2x (0.5 to 2.5 mm²) solid or stranded conductors per pole."},{"question":"What is the auxiliary contact rating at 24 VDC?","answer":"The built-in auxiliary switch is rated 10 A at 24 V DC. Derating applies at higher DC voltages — 2 A at 48 V, 1 A at 110 V, 0.3 A at 220 V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2526-2BB40","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/3RT2526-2BB40 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}}