{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT6018-1AK21","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT6018-1AK21","canonicalUrl":"https://aoctrl.com/siemens/3RT6018-1AK21","factsUrl":"https://aoctrl.com/api/mcp/products/3RT6018-1AK21","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, Size S00, 3RT6018-1AK21, 45 mm width, 73 mm depth, screw-type terminals, rated 7.5 kW at 230 V and 13 kW at 400 V at 60 °C.","salesMarkdown":"Side-by-side mounting is permitted, so multiple contactors pack tightly on the rail without mandatory spacing. Screw-type terminals on the main current circuit accept 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), or 2x 4 mm² solid or stranded wire. At 40 °C ambient, minimum 4 mm² is permissible; at 60 °C, minimum 2.5 mm². The S00 footprint (45 × 57.5 × 73 mm) fits compact control panels. ## Coil drive and switching performance Coil holding current at 24 V rated value is 6 A, dropping to 1 A at 110 V, 0.3 A at 220 V, and 0.25 A at both 50 Hz and 60 Hz. At 230 V the coil draws 10 A; at 400 V it draws 3 A; at 690 V it draws 1 A. These values govern the control transformer sizing and PLC output drive capability. Rated for 10,000 switching operations per hour at AC, with AC-1 maximum at 1,000 1/h, AC-3 maximum at 750 1/h, and AC-4 maximum at 250 1/h. The mechanical endurance is 30,000,000 operations typical, so the contactor outlasts the panel in most cyclic applications. The substance prohibition date of 05/01/2012 indicates RoHS compliance from that point.","metaTitle":"Siemens 3RT6018-1AK21 SIRIUS Power Contactor, Size S00, 45 m","metaDescription":"Siemens 3RT6018-1AK21 SIRIUS power contactor, Size S00, 45 mm wide. Rated for 7.5 kW at 230 V and 13 kW at 400 V at 60 °C. Active production, available to order. RFQ for current pr","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Width":"45 mm","at AC":"10 000 1/h","Height":"57.5 mm","at 50 Hz":"0.25","at 60 Hz":"0.25","During Storage":"-55 ... +80 °C","at AC-1 maximum":"1 000 1/h","at AC-3 maximum":"750 1/h","at AC-4 maximum":"250 1/h","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 50022","at AC-3e maximum":"750 1/h","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":"S00","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"Power contactor","at 24 V rated value":"6 A","Of Contactor Typical":"30 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.3 A","at 230 V rated value":"10 A","at 400 V rated value":"3 A","at 50 Hz rated value":"120 V","at 60 Hz rated value":"120 V","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-3 rated value maximum":"690 V","at AC-3e rated value maximum":"690 V","Substance Prohibitance (Date)":"05/01/2012","at 40 °C minimum permissible":"4 mm²","at 60 °C minimum permissible":"2.5 mm²","Insulation Voltage Rated Value":"690 V","at 230 V at 60 °C rated value":"7.5 kW","at 400 V at 60 °C rated value":"13 kW","at 690 V at 60 °C rated value":"22 kW","for AWG cables for main contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","With Type Of Assignment 2 Required":"gL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 20 A","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"gL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 35 A","operational current at AC-12 maximum":"10 A","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","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)","at ambient temperature 40 °C rated value":"22 A","at ambient temperature 60 °C rated value":"20 A","Type Of Voltage Of The Control Supply Voltage":"AC","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Required Spacing With Side-By-Side Mounting At The Side":"0 mm","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":"1","number of NO contacts for auxiliary contacts instantaneous contact":"0"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cf331acc1aed41e4d8920628e03f2c94.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=754463&mlfb=3RT6018-1AK21","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT6018-1AK21/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT6018-1AK21 and what is the price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What are the key dimensions of 3RT6018-1AK21?","answer":"Width is 45 mm, height is 57.5 mm, and depth is 73 mm. It mounts on 35 mm DIN rail."},{"question":"What compliance documentation is available for 3RT6018-1AK21?","answer":"The part carries a substance prohibition date of 05/01/2012, indicating RoHS compliance. Rated insulation voltage is 690 V, and pollution degree is 3. Standard Siemens SIRIUS documentation (datasheet, CE declaration) applies."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT6018-1AK21","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/3RT6018-1AK21 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}}