{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1AR00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1AR00","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1AR00","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1AR00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S0 power contactor, 3RT1025-1AR00, 3-pole, 45 mm width, screw terminals, AC-3 rated 7.5 kW at 400 V, snap-on DIN rail mount.","salesMarkdown":"## SIRIUS S0 power contactor — 3RT1025-1AR00 The Siemens 3RT1025-1AR00 is a SIRIUS S0-frame power contactor, three main poles normally open, rated for AC-3 motor switching at 7.5 kW on a 400 V three-phase line. It mounts via screw or snap-on onto a 35 mm DIN rail per EN 50022, taking 45 mm of panel width and 85 mm height, with a 91 mm depth that clears most standard gland plates and enclosure backwalls. The coil is rated for 50 Hz operation at a voltage factor of 0.8 to 1.1 times the rated value, so it holds in during brownout conditions down to 80 % of nominal. For the main circuit, screw-type terminals accept solid or stranded conductors up to 2x 10 mm² or a single 10 mm², with a separate auxiliary contact block wired through 0.5 to 4 mm² terminals — no special crimp tooling needed for panel assembly. ## Motor duty ratings — AC-3 and AC-4 at 400 V At 400 V, the AC-3 duty rating is 7.5 kW, which covers standard squirrel-cage motors up to that power for starting and disconnecting under load. The AC-4 rating at the same voltage is 15.5 A — this is the inching/plugging current the contactor can interrupt repeatedly, relevant for reversing or jogging applications. For resistive loads (AC-1), the maximum continuous operating current is 10 A. The auxiliary contacts switch 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V, with lower ratings for DC loads — 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V. These numbers govern the control-circuit side: a PLC output driving a 24 V DC auxiliary contact sees a 10 A make/break capacity, well above typical pilot-duty requirements. ## Panel integration — S0 frame, DIN rail, clearances The S0 frame is Siemens' compact footprint for contactors up to about 12 kW AC-3.","metaTitle":"Siemens 3RT1025-1AR00 SIRIUS S0 Power Contactor, 45mm, AC-3","metaDescription":"Siemens 3RT1025-1AR00 SIRIUS S0 power contactor, 3-pole, 45mm width, AC-3 7.5kW at 400V, screw terminals, snap-on DIN rail mount, IP20 front. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"91 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","Maximum":"2 000 m","at 50 Hz":"0.8 ... 1.1","At The Side":"6 mm","On The Front":"IP20","1 Rated Value":"50 Hz","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","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 50 Hz rated value":"415 V","at 500 V rated value":"10 kW","at 690 V rated value":"11 kW","Instantaneous Contact":"0","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","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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"screw-type terminals","at ambient temperature 40 °C rated value":"40 A","Apparent holding power of magnet coil at AC":"7.8 V·A","Apparent pick-up power of magnet coil at AC":"61 V·A","Type of voltage of the control supply voltage":"AC","Inductive power factor with closing power of the coil":"0.82","Inductive power factor with the holding power of the coil":"0.24","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=98181&mlfb=3RT1025-1AR00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1AR00/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RT1025-1AR00?","answer":"The 3RT1023-1AL20 is a smaller S0-frame contactor in the same SIRIUS family, but it has a lower AC-3 rating (5.5 kW at 400 V) and different coil voltage. The 3RT1025-1AR00 at 7.5 kW AC-3 is the next step up; a panel wired for the 3RT1023-1AL20 would need to verify the coil voltage and main circuit current before swapping, as the terminal layout and DIN footprint are identical but the power ratings differ."},{"question":"Where can I buy 3RT1025-1AR00 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead-time estimate."},{"question":"What compliance documentation does Siemens provide for 3RT1025-1AR00?","answer":"The manufacturer provides RoHS and REACH compliance declarations as standard for the SIRIUS product line. The part carries a DIN EN 81346-2 reference code Q for power switching equipment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1AR00","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/3RT1025-1AR00 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}}