{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2526-1BP40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2526-1BP40","canonicalUrl":"https://aoctrl.com/siemens/3RT2526-1BP40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2526-1BP40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2526-1BP40 contactor, size S0, 230 V AC 50/60 Hz coil, screw-type terminals, auxiliary switch, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"It mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 50022, and the mounting position allows +/-180° rotation on a vertical surface plus +/-22.5° tilt forward and backward — useful when you're squeezing it into a crowded enclosure and the busbars run an odd angle. The coil is rated 230 V AC, with a pickup threshold of 0.8 x rated value (184 V) and a drop-out of 0.55 x rated value (126.5 V) — so if your control transformer sags under load, this contactor stays pulled in until the voltage drops below 126 V. The coil's full-scale value is 1.1 x rated (253 V), which is the maximum continuous overvoltage it can take without cooking the winding. The auxiliary switch (built-in, screw-type terminals) handles 10 A at 24 V and 230 V AC, but derates significantly at higher voltages: 3 A at 400 V, 1 A at 690 V. The mechanical endurance is rated at 10,000,000 operations typical, so this contactor will outlast most panels if the switching frequency stays under 5,000 cycles per hour (AC load) or 1,000 cycles per hour at AC-1 maximum. The arcing time is 10 ms, and the DC operating time (closing + opening) is 15 to 18 ms — fast enough for most sequencing, but if you're coordinating with a fast semiconductor output, you'll want to account for that 10 ms arc extinction window. Dimensions: 85 mm high, 61 mm wide, 107 mm deep — the S0 footprint is compact enough for a 4-wide section on a DIN rail, but the 107 mm depth means you need at least 120 mm clearance from the backplane to the enclosure door. The screw terminals accept 2x (0.5 to 1.5 mm²) solid or stranded on the smaller pair, and 2x (0.75 to 2.5 mm²) on the larger pair — standard for control wiring up to 14 AWG. Clearance distances: 0 mm on all sides except 6 mm at the side, so you can butt multiple contactors side-by-side without extra spacing, which saves rail space. ## Environmental Limits The storage range is wider because the contactor isn't switching under load — it's just sitting on a shelf. If your panel is in a non-climate-controlled warehouse that hits -30 °C, this contactor will still work, but the coil might pull a bit more inrush current until it warms up.","metaTitle":"Siemens 3RT2526-1BP40 SIRIUS Contactor, S0 Size, 230 V AC Co","metaDescription":"Siemens 3RT2526-1BP40 SIRIUS contactor, size S0, 230 V AC coil, screw terminals, 10 A auxiliary at 230 V. DIN rail mount, current production. 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":"230 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":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=45408&mlfb=3RT2526-1BP40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2526-1BP40/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for the auxiliary switch on this contactor?","answer":"The auxiliary switch is rated 10 A at 24 V and 230 V AC, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. At DC voltages, it handles 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, and 0.1 A at 600 V."},{"question":"What are the physical dimensions of the 3RT2526-1BP40?","answer":"Height is 85 mm, width is 61 mm, and depth is 107 mm. It fits the S0 frame size."},{"question":"What wire sizes does the screw terminal accept?","answer":"The terminals accept 2x (0.5 to 1.5 mm²) and 2x (0.75 to 2.5 mm²) solid or stranded conductors."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2526-1BP40","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/3RT2526-1BP40 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}}