{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1916-2DG21","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1916-2DG21","canonicalUrl":"https://aoctrl.com/siemens/3RT1916-2DG21","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1916-2DG21","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1916-2DG21 timing relay, OFF-delay function, adjustable time 0.5 … 10 s, coil supply 24 … 66 V AC/DC, clip-on mounting, 45 mm width.","salesMarkdown":"The Siemens SIRIUS 3RT1916-2DG21 is a timing relay with an OFF-delay function — meaning the load remains energized for a set interval after the control signal drops. The adjustable time range spans 0.5 to 10 seconds, with a recovery time of 150 ms before the relay can accept the next trigger. Coil supply accepts 24 … 66 V at both AC (50/60 Hz) and DC, so it works across mixed-voltage control circuits without needing a separate DC supply module. The minimum ON period is 35 ms — short enough for pulse-triggered sequences but long enough to avoid chatter on a bouncing contact. Basic insulation is sufficient for control-circuit isolation but not for mains-to-touch separation; the relay is intended for use within an enclosure, not as a standalone device. Wire termination accepts 2x (20 … 14) AWG solid or stranded — typical for control wiring up to 2.5 mm². The 38 mm depth and 38 mm height keep the relay shallow enough for shallow enclosures or tight gland-plate clearance.","metaTitle":"Siemens SIRIUS 3RT1916-2DG21 Timing Relay, OFF-Delay, 24-66","metaDescription":"Siemens SIRIUS 3RT1916-2DG21 timing relay with OFF-delay function. Adjustable 0.5-10 s time range. Coil 24-66 V AC/DC. Clip-on 45 mm wide. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"38 mm","Solid":"18 ... 14","Width":"45 mm","at DC":"24 ... 66 V","Height":"38 mm","Upwards":"0 m","Forwards":"0 m","ON-delay":"No","Stranded":"18 ... 14","at 50 Hz":"24 ... 66 V","at 60 Hz":"24 ... 66 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","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)":"01.07.2006 00:00:00","Design Of The Surge Suppressor":"with varistor","ON-delay/instantaneous contact":"No","additive ON-delay/instantaneous":"No","EMC immunity acc. to IEC 61812-1":"EN 61000-6-2","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","due to burst acc. to IEC 61000-4-4":"2 kV network connection / 1 kV control connection","reference code acc. to IEC 81346-2":"K","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","Flashing Symmetrically With Pulse Start":"No","Product Component Semi-Conductor Output":"Yes","shock resistance acc. to IEC 60068-2-27":"11g / 15 ms","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","vibration resistance acc. to IEC 60068-2-6":"10 ... 55 Hz: 0.35 mm","Design Of The Control Terminal Non-Floating":"Yes","Flashing Asymmetrically With Interval Start":"No","Retriggerable With Deactivated Control Signal":"No","Type Of Voltage Of The Control Supply Voltage":"AC/DC","electrostatic discharge acc. to IEC 61000-4-2":"4 kV contact discharge / 8 kV air discharge","Switching Capacity Current With Inductive Load":"0.3 A","field-based interference acc. to IEC 61000-4-3":"10 V/m","Retrotriggerable With Switched-On Control Signal":"No","Mechanical Service Life (Operating Cycles) Typical":"100 000 000","Size Of Contactor Can Be Combined Company-Specific":"S00","due to conductor-earth surge acc. to IEC 61000-4-5":"2 kV","protection class IP on the front acc. to IEC 60529":"IP20","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 Function 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=380333&mlfb=3RT1916-2DG21","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1916-2DG21/alternatives.json"},"ai":{"faq":[{"question":"What is 3RT1916-2DG21's listed depth?","answer":"The listed depth is 38 mm. Combined with the 45 mm width and 38 mm height, the relay occupies a compact footprint on the DIN rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1916-2DG21","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/3RT1916-2DG21 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}}