{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-3BB44-3MA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-3BB44-3MA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-3BB44-3MA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-3BB44-3MA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S0, 24 VDC coil, screw terminals, 7.5 kW AC-2 at 400 V, IP20 front, snap-on DIN rail mount.","salesMarkdown":"Rated for AC-2 duty at 7.5 kW and AC-4 at 15.5 A, both at 400 V, this contactor handles squirrel-cage motor starting and plugging/reversing applications. The 24 VDC coil draws 5.4 W holding power, with switching capacity rated at 10 A at 24 VDC and 0.3 A at 220 VDC. Screw-type terminals on the main circuit accept 2x (0.25 to 2.5 mm²) solid or stranded, up to 2x 10 mm² maximum. AWG equivalents are 2x (16 to 12) and 2x (14 to 10). The two instantaneous auxiliary contacts are rated for AC-12 at 10 A maximum. ## Ratings and Coordination Motor power ratings: 10 kW at 500 V and 11 kW at 690 V. For short-circuit coordination, type 1 requires a gL/gG fuse rated 63 A; type 2 requires 25 A.","metaTitle":"Siemens 3RT1025-3BB44-3MA0 SIRIUS Power Contactor, 24 VDC, S","metaDescription":"Siemens SIRIUS 3RT1025-3BB44-3MA0 power contactor, size S0, 24 VDC coil, screw terminals, AC-2 7.5 kW at 400 V. Active lifecycle. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"150 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"85 mm","Maximum":"2 000 m","At The Side":"6 mm","Rated Value":"24 V","On The Front":"IP20","Initial Value":"0.8","Mounting type":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Of The Terminal":"IP00","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Full-scale value":"1.1","Size of contactor":"S0","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","Instantaneous Contact":"2","Side-by-side mounting":"Yes","For Main Current Circuit":"screw-type terminals","Single Or Multi-Stranded":"2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²","at AC-2 at 400 V rated value":"7.5 kW","at AC-4 at 400 V rated value":"15.5 A","Closing power of magnet coil at DC":"5.4 W","Holding power of magnet coil at DC":"5.4 W","Operating current at AC-12 maximum":"10 A","With Type Of Assignment 2 Required":"fuse gL/gG: 25 A","at AWG conductors for main contacts":"2x (16 ... 12), 2x (14 ... 10), 1x 8","With Type Of Coordination 1 Required":"fuse gL/gG: 63 A","Reference code acc. to DIN EN 81346-2":"Q","Number of NC contacts for main contacts":"0","Number of NO contacts for main contacts":"3","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (24 ... 14)","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"spring-loaded terminals","at ambient temperature 40 °C rated value":"40 A","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Type of voltage of the control supply voltage":"DC","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","Of The Contactor With Added Electronics-Compatible Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=386664&mlfb=3RT1025-3BB44-3MA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-3BB44-3MA0/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation is available?","answer":"The part carries a current lifecycle status and is manufactured to Siemens SIRIUS standards. Specific RoHS, REACH, and UL documentation should be requested at time of order for your jurisdiction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-3BB44-3MA0","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/3RT1025-3BB44-3MA0 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}}