{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2026-2AB04","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2026-2AB04","canonicalUrl":"https://aoctrl.com/siemens/3RT2026-2AB04","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2026-2AB04","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, Size S0 power contactor, 3RT2026-2AB04, 21 A at 480 V AC-3, spring-type terminals, screw and snap-on 35 mm DIN rail mount.","salesMarkdown":"## SIRIUS 3RT2026-2AB04 — Size S0 Power Contactor, Spring-Terminal The Siemens SIRIUS 3RT2026-2AB04 is a Size S0 power contactor rated for 21 A at 480 V in AC-3 duty — that's the motor-switching current, so it handles a 10 hp motor at 480 V three-phase without derating. The 21 A at 480 V AC-3 rating is the key selection number — it tells you the contactor can switch a three-phase induction motor drawing 21 A under full load, breaking the current during start and stop. For resistive loads (AC-1), the mechanical switching frequency goes up to 1,000 operations per hour; for motor duty at AC-3, it's 750 ops/h. The 10 million mechanical operations typical life means this contactor outlasts most machines it's installed in — you'll replace the machine before the contactor wears out mechanically. ## Coil and Auxiliary Contact Notes This variant ships without an auxiliary switch block — you add a separate SIRIUS auxiliary contact block if you need N.O./N.C. feedback for the PLC or status indication. The coil is 24 VDC rated at 6 A — that's the inrush, not the hold; the actual sealed current is lower. The spring terminals accept 2x (0.5 to 2.5 mm²) for control wiring — fine for the coil circuit and any auxiliary wiring.","metaTitle":"Siemens SIRIUS 3RT2026-2AB04 Power Contactor, Size S0, 21 A","metaDescription":"Siemens SIRIUS 3RT2026-2AB04 power contactor, Size S0 frame, 21 A rated at 480 V AC-3. Spring-type terminals, DIN rail mount. Current lifecycle stage; available to order. Quoted on","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"144 mm","Solid":"1 ... 10 mm²","Width":"45 mm","at AC":"4 ... 16 ms","title":"3RT2026-2AB04","Height":"102 mm","Upwards":"10 mm","Forwards":"10 mm","Stranded":"1 ... 10 mm²","at 50 Hz":"0.25","Downwards":"10 mm","Arcing Time":"10 ... 10 ms","At The Side":"6 mm","description":"power contactor, AC-3e/AC-3, 25 A, 11 kW / 400 V, 3-pole, 24 V AC, 50 Hz, auxiliary contacts: 2 NO + 2 NC, spring-loaded terminal, size: S0, removable auxiliary switch","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Spring-type terminals","at AC-1 maximum":"1 000 1/h","at AC-2 maximum":"750 1/h","at AC-3 maximum":"750 1/h","at AC-4 maximum":"250 1/h","lifecycle_stage":"current","Auxiliary Switch":"No","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715","at AC-3e maximum":"750 1/h","For Main Contacts":"18 ... 8","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 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Power contactor","at 24 V rated value":"6 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":"3 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.6 A","at 480 V rated value":"21 A","at 50 Hz rated value":"24 V","at 500 V rated value":"2 A","at 600 V rated value":"22 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"spring-loaded terminals","at 110/120 V rated value":"2 hp","at 200/208 V rated value":"5 hp","at 220/230 V rated value":"7.5 hp","at 460/480 V rated value":"15 hp","at 575/600 V rated value":"20 hp","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"6 kV","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"5.7 W","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"15.5 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"10/01/2009","at AWG cables for main contacts":"2x (18 ... 8)","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"35.2 A","at AC-5b up to 400 V rated value":"20.7 A","For Auxiliary And Control Circuit":"spring-loaded terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 35A (690V, 100kA), aM: 20A (690V, 100kA), BS88: 35A (415V, 80kA)","Without Load Current Share Typical":"9.8 W","At Contactor For Auxiliary Contacts":"Spring-type terminals","With Type Of Coordination 1 Required":"gG: 100 A (690 V, 100 kA), aM: 50 A (690 V, 100 kA), BS88: 100 A (415 V, 80 kA)","at AWG cables for auxiliary contacts":"2x (20 ... 14)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"1.9 W","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","mirror contact according to IEC 60947-4-1":"Yes","with low demand rate according to SN 31920":"40 %","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","with high demand rate according to SN 31920":"73 %","Type Of Voltage Of The Control Supply Voltage":"AC","Limited To 1 S Switching At Zero Current Maximum":"375 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"299 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":"gG: 10 A (500 V, 1 kA)","minimum cross-section in main circuit at maximum AC-1 rated value":"10 mm²","number of NC contacts for auxiliary contacts instantaneous contact":"2","number of NO contacts for auxiliary contacts instantaneous contact":"2","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$45.72","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c692f923d3c918d91e439848ccc914dd.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=348981&mlfb=3RT2026-2AB04"},"ai":{"faq":[{"question":"What is 3RT2026-2AB04's rated current at 480 V AC-3?","answer":"The 3RT2026-2AB04 is rated for 21 A at 480 V in AC-3 duty — that's the motor-switching current for a three-phase induction motor."},{"question":"What wire sizes does the spring terminal accept?","answer":"The spring-type terminals accept solid or stranded wire from 1 to 10 mm² for the main power circuit, and 2x (0.5 to 2.5 mm²) for control wiring."},{"question":"Where can I buy 3RT2026-2AB04?","answer":"The 3RT2026-2AB04 is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"Does 3RT2026-2AB04 include an auxiliary contact block?","answer":"No, this variant ships without an auxiliary switch. You need to order a separate SIRIUS auxiliary contact block if you require N.O./N.C. feedback."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2026-2AB04","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/3RT2026-2AB04 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}