{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1BP40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1BP40","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1BP40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1BP40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1025-1BP40, S0 frame, 230 V AC coil, screw-type terminals, IP20 front, 45 mm width.","salesMarkdown":"The 230 V AC coil pulls 5.4 W during both closing and holding — no power drop after pickup, which matters when the control transformer is sized tight. ## Terminals and wiring Both main and auxiliary circuits use screw-type terminals. Main terminals accept 2x (1 to 2.5 mm²) solid or stranded, up to 2x 6 mm², max 2x 10 mm². Auxiliary terminals take 2x (0.5 to 1.5 mm²) solid, 2x (0.75 to 2.5 mm²) stranded, max 2x 4 mm². AWG equivalents are listed for both: main 2x (16 to 12), 2x (14 to 10), 1x 8; auxiliary 2x (20 to 16), 2x (18 to 14), 1x 12. That covers most panel wire from 1.5 mm² control circuits up to 10 mm² motor feeds. IP20 on the front face, IP00 at the terminals — standard for an open-panel contactor. The terminal shroud is the panel builder's call if the enclosure IP rating requires it. ## Switching capacity and coordination Rated operational current at AC-12 (resistive) is 10 A maximum. Motor-duty ratings: at AC-2 at 400 V it handles 7.5 kW; at AC-4 at 400 V it carries 15.5 A — that's the reversing or inching duty cycle, where the contactor makes and breaks full load current. At 690 V, the motor rating is 11 kW. For DC switching: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, 6 A at 230 V, 3 A at 400 V, 10 kW at 500 V. Type 1 coordination requires a 63 A gL/gG fuse upstream; Type 2 coordination calls for 25 A gL/gG. That's the short-circuit protection the contactor needs to stay functional after a fault — spec it into the feeder design, not after.","metaTitle":"Siemens SIRIUS 3RT1025-1BP40 Power Contactor, S0, 230 V Coil","metaDescription":"Siemens SIRIUS 3RT1025-1BP40 power contactor, S0 frame, 230 V AC coil, screw terminals, IP20 front. Active production. Sourced to order. RFQ for current pricing.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"101 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"45 mm","Height":"85 mm","Rated Value":"230 V","On The Front":"IP20","Initial Value":"0.8","Of The Terminal":"IP00","lifecycle_stage":"current","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","Size Of Contactor":"S0","Solid Or Stranded":"2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"power contactor","at 24 V rated value":"10 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.3 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 500 V rated value":"10 kW","at 690 V rated value":"11 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"7.5 kW","at AC-4 at 400 V rated value":"15.5 A","Substance Prohibitance (Date)":"01.07.2006 00:00:00","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 10), 1x 8","For Auxiliary And Control Circuit":"screw-type terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 25 A","closing power of magnet coil at DC":"5.4 W","holding power of magnet coil at DC":"5.4 W","reference code acc. to IEC 81346-2":"Q","With Type Of Coordination 1 Required":"fuse gL/gG: 63 A","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","number of NC contacts for main contacts":"0","number of NO contacts for main contacts":"3","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":"3","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Type Of Voltage Of The Control Supply Voltage":"DC","Required Spacing For Grounded Parts At The Side":"6 mm","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","number of NC contacts for auxiliary contacts instantaneous contact":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$303.00","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=140753&mlfb=3RT1025-1BP40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1BP40/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of the 3RT1025-1BP40?","answer":"The depth is 101 mm. Width is 45 mm, height is 85 mm — standard S0 envelope that fits alongside other SIRIUS contactors on the same DIN rail."},{"question":"What wire sizes fit the main and auxiliary terminals?","answer":"Main terminals accept 2x (1 to 2.5 mm²) solid or stranded, up to 2x 6 mm², max 2x 10 mm². Auxiliary terminals accept 2x (0.5 to 1.5 mm²) solid or 2x (0.75 to 2.5 mm²) stranded, max 2x 4 mm². AWG equivalents are provided in the spec table."},{"question":"Does the 3RT1025-1BP40 drop into a panel wired for the 3RT1026-1AB00?","answer":"Both are S0 frame contactors with the same 45 mm width and screw-type terminals, so the footprint and DIN rail position match. The main difference is the coil voltage — this one is 230 V AC, while the 3RT1026-1AB00 uses a different coil rating. Verify the control circuit voltage before swapping."},{"question":"Where can I buy the 3RT1025-1BP40?","answer":"This part is sourced and quoted to order through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time, not before."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1BP40","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/3RT1025-1BP40 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}}