{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1926-2DH21","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1926-2DH21","canonicalUrl":"https://aoctrl.com/siemens/3RT1926-2DH21","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1926-2DH21","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS timing relay, 3RT1926-2DH21, OFF-delay, adjustable time 0.5...10 s, control supply 90...240 V AC/DC, clip-on mounting, 45 mm width.","salesMarkdown":"## Timing Relay with OFF-Delay — SIRIUS 3RT1926-2DH21 The Siemens SIRIUS 3RT1926-2DH21 is a timing relay designed with OFF-delay, meaning the output remains energized for a set period after the control signal is removed — useful for sequenced shutdowns, post-lubrication runs, or delayed vent cycles. The adjustable time range spans 0.5 to 10 seconds, and the recovery time between cycles is 150 ms, so it can re-trigger quickly in a repeating sequence. Clip-on fastening to standard DIN rail — snaps onto the rail without tools, and the 45 mm width occupies one standard modular device space.","metaTitle":"Siemens SIRIUS 3RT1926-2DH21 Timing Relay, OFF-Delay, 0.5...","metaDescription":"Siemens SIRIUS 3RT1926-2DH21 timing relay with OFF-delay, adjustable 0.5...10 s, 90...240 V AC/DC. Clip-on DIN rail. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"50 mm","Solid":"18 ... 14","Width":"45 mm","at DC":"90 ... 240 V","Height":"26 mm","Upwards":"0 m","Forwards":"0 m","ON-delay":"No","Stranded":"18 ... 14","at 50 Hz":"90 ... 240 V","at 60 Hz":"90 ... 240 V","Backwards":"0 m","Downwards":"0 m","OFF delay":"Yes","At The Side":"0 m","Non-Volatile":"No","Initial Value":"0.8","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","minimum ON period":"35 ms","ON-delay/OFF-delay":"No","Product Brand Name":"SIRIUS","Star-Delta Circuit":"No","Type Of Insulation":"Basic insulation","Degree Of Pollution":"3","Product Designation":"timing relay","at AWG cables solid":"2x (20 ... 14)","Passing Make Contact":"No","Design Of The Product":"With OFF-delay","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","Design Of The Surge Suppressor":"with varistor","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","protection class IP of the terminal":"IP20","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":"Yes","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":"Yes","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/DC","Switching Capacity Current With Inductive Load":"0.5 A","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":"100 000 000","Size Of Contactor Can Be Combined Company-Specific":"S0 ... S3","electrostatic discharge according to IEC 61000-4-2":"4 kV contact discharge / 8 kV air discharge","short-time withstand current (Icw) limited to 10 ms":"10 A","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"}},"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=203349&mlfb=3RT1926-2DH21","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1926-2DH21/alternatives.json"},"ai":{"faq":[{"question":"What is the adjustable time range of 3RT1926-2DH21?","answer":"The adjustable time range is 0.5 to 10 seconds."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1926-2DH21","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/3RT1926-2DH21 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}}