{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1926-2ED21","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1926-2ED21","canonicalUrl":"https://aoctrl.com/siemens/3RT1926-2ED21","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1926-2ED21","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch, 3RT1926-2ED21, ON-delay adjustable 0.5-10 s, 200-240 V AC coil, 3 A max switching, clip-on mounting.","salesMarkdown":"## What this auxiliary switch does in a contactor assembly The 3RT1926-2ED21: It provides a delayed N/O signal after the coil is energized, with the delay adjustable from 0.5 to 10 s via a potentiometer on the face of the block. ## Mounting and integration with 3RT contactors The block clips onto the front of a SIRIUS contactor using the standard accessory interface — no tools required, and it occupies the width of the contactor (33 mm). Overall dimensions are 33 mm wide, 46 mm high, and 73 mm deep, fitting within the envelope of the contactor assembly. ## Wiring and contact configuration It provides a single N/O contact with ON-delay; there is no OFF-delay, no pulse-shaping, and no star-delta circuit function.","metaTitle":"Siemens 3RT1926-2ED21 SIRIUS Auxiliary Switch, ON-Delay","metaDescription":"Siemens 3RT1926-2ED21 SIRIUS auxiliary switch with ON-delay, 0.5-10 s adjustable, 200-240 V AC coil, rated 3 A max. Active production, sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Solid":"18 ... 14","Width":"33 mm","title":"3RT1926-2ED21","Height":"46 mm","Maximum":"3 A","Upwards":"0 m","at 24 V":"1 A","Forwards":"0 m","ON-delay":"Yes","Stranded":"18 ... 14","at 125 V":"0.2 A","at 250 V":"0.1 A","at 50 Hz":"200 ... 240 V","at 60 Hz":"200 ... 240 V","Backwards":"0 m","Downwards":"0 m","OFF delay":"No","At The Side":"0 m","description":"solid-state time-delayed front-side auxiliary switch Time range 0.5...10 s, 200... 240 V AC, 1 NO contact, 1 NC contact ON delay, for 3RT1","Non-Volatile":"No","Initial Value":"0.85","Pulse Delayed":"No","Pulse-Shaping":"No","Recovery Time":"150 ms","During Storage":"-40 ... +85 °C","Adjustable Time":"0.5 ... 10 s","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +85 °C","Fastening Method":"clip-on","Full-Scale Value":"1.1","Delayed Switching":"0","Mounting Position":"any","additive ON-delay":"No","ON-delay/OFF-delay":"No","Product Brand Name":"SIRIUS","Star-Delta Circuit":"No","Type Of Insulation":"Basic insulation","Degree Of Pollution":"3","Product Designation":"auxiliary switch","at AWG cables solid":"2x (20 ... 14)","Passing Make Contact":"No","Design Of The Product":"slow-operating","Instantaneous Contact":"0","Passing Break Contact":"No","at AWG cables stranded":"2x (20 ... 14)","OFF delay/instantaneous":"No","Relative Repeat Accuracy":"1 %","Pulse Delayed/Instantaneous":"No","Pulse-Shaping/Instantaneous":"No","Substance Prohibitance (Date)":"07/01/2006","ON-delay/instantaneous contact":"No","additive ON-delay/instantaneous":"No","ON-delay/OFF-delay/instantaneous":"No","Variably Clocked With Pulse Start":"No","Control Supply Voltage Frequency 1":"50 ... 60 Hz","Relative Humidity During Operation":"15 ... 95 %","Star-Delta Circuit With Delay Time":"No","Passing Break Contact/Instantaneous":"No","Product Function Star-Delta Circuit":"No","Surge Voltage Resistance Rated Value":"4 000 V","Variably Clocked With Interval Start":"No","Constant Clock Cycle With Pulse Start":"No","EMC immunity according to IEC 61812-1":"EN 61000-6-2","Flashing Symmetrically With Pulse Start":"No","Product Component Semi-Conductor Output":"No","due to burst according to IEC 61000-4-4":"2 kV network connection / 1 kV control connection","reference code according to IEC 81346-2":"K","Constant Clock Cycle With Interval Start":"No","Finely Stranded With Core End Processing":"0.5 ... 2.5 m²","Flashing Asymmetrically With Pulse Start":"No","Product Extension Optional Remote Control":"No","Product Extension Required Remote Control":"No","Flashing Symmetrically With Interval Start":"No","Passing Make Contact/Instantaneous Contact":"No","Design Of The Control Terminal Non-Floating":"No","Flashing Asymmetrically With Interval Start":"No","shock resistance according to IEC 60068-2-27":"11g / 15 ms","Retriggerable With Deactivated Control Signal":"No","Type Of Voltage Of The Control Supply Voltage":"AC","vibration resistance according to IEC 60068-2-6":"10 ... 55 Hz: 0.35 mm","Retrotriggerable With Switched-On Control Signal":"No","Mechanical Service Life (Switching Cycles) Typical":"10 000 000","Size Of Contactor Can Be Combined Company-Specific":"S0 ... S12","electrostatic discharge according to IEC 61000-4-2":"4 kV contact discharge / 8 kV air discharge","At The Relay Outputs Switchover Delayed/Without Delay":"No","Flashing Symmetrically With Pulse Start/Instantaneous":"No","Relative Setting Accuracy Relating To Full-Scale Value":"15 %","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Flashing Symmetrically With Interval Start/Instantaneous":"No","Type Of Electrical Connection For Auxiliary And Control Circuit":"screw-type terminals","Product Component Removable Terminal For Auxiliary And Control Circuit":"No","Retrotriggerable With Deactivated Control Signal/Instantaneous Contact":"No","Retrotriggerable With Switched-On Control Signal/Instantaneous Contact":"No","Design Of The Fuse Link For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 4 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$33.15","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c4468ce6d3668e76c7b4e53a90f9a71b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=134330&mlfb=3RT1926-2ED21"},"ai":{"faq":[{"question":"How do I set the time delay on the 3RT1926-2ED21?","answer":"The ON-delay is adjustable from 0.5 to 10 seconds using a potentiometer on the front face of the auxiliary switch block. Turn the adjustment screw with a small flat-blade screwdriver to set the desired delay; the scale on the housing provides approximate reference marks."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1926-2ED21","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/3RT1926-2ED21 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}}