{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1916-2GD51","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1916-2GD51","canonicalUrl":"https://aoctrl.com/siemens/3RT1916-2GD51","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1916-2GD51","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch, 3RT1916-2GD51, clip-on mount, 200-240 V AC 50/60 Hz coil, adjustable ON-delay 1.5-30 s, 1 A at 24 V contact rating, IP20.","salesMarkdown":"The Siemens 3RT1916-2GD51 is a SIRIUS-brand auxiliary switch with an adjustable ON-delay timer, designed to clip onto a contactor or star-delta starter assembly. It gives you a timed auxiliary contact that closes after a set delay from coil energization — the adjustable time range spans 1.5 to 30 seconds, with a recovery time of 150 ms before it can be re-triggered. The coil is rated for 200-240 V AC at both 50 and 60 Hz, so it drops straight into a standard European control-voltage circuit without a separate transformer tap. The switching contacts handle 1 A at 24 V, 0.2 A at 125 V, and 0.1 A at 250 V — enough for PLC inputs, pilot lights, or signal relays, not for direct motor switching. The part is explicitly designated for star-delta circuits, meaning the timer is wired into the transition leg between star and delta contactors. If your panel uses a star-delta start scheme, this auxiliary switch is the timed element that holds the star contactor closed for the acceleration period then releases it. Clip-on mounting means it snaps directly onto the front of a SIRIUS contactor or onto a DIN rail adapter — no screws, no tools beyond a screwdriver for the wiring terminals. The IP20 finger-safe enclosure is standard for inside a panel; keep it behind a locked door or within a dead-front enclosure. ## Ratings and environment Storage and transport temperature range is -40 to +85 °C, and operating humidity is 15 to 95 % non-condensing. The mechanical endurance is listed as 10 000 000 typical cycles — that's the switch mechanism itself, not the electrical life under load. For the contact ratings given, expect the electrical life to be a fraction of that, especially at the higher voltage/current combinations.","metaTitle":"Siemens 3RT1916-2GD51 SIRIUS Auxiliary Switch, 45mm wide, 1.","metaDescription":"Siemens 3RT1916-2GD51 SIRIUS auxiliary switch with adjustable ON-delay 1.5-30s, 200-240V 50/60Hz coil, clip-on mount, IP20. Current production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"75 mm","Solid":"18 ... 14","Width":"45 mm","Height":"38 mm","Maximum":"2 000 m","Typical":"10 000 000","Upwards":"0 m","at 24 V":"1 A","Forwards":"0 m","ON-delay":"No","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","Initial Value":"0.85","Mounting type":"clip-on","Pulse Delayed":"No","Pulse-Shaping":"No","Recovery time":"150 ms","During Storage":"-40 ... +85 °C","Adjustable Time":"1.5 ... 30 s","Of The Terminal":"IP20","lifecycle_stage":"current","During Operation":"15 ... 95 %","During Transport":"-40 ... +85 °C","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":"Yes","Type of insulation":"Basic insulation","Degree of pollution":"3","Product designation":"auxiliary switch","acc. to IEC 61812-1":"EN 61000-6-2","Passing Make Contact":"No","Instantaneous Contact":"0","Passing Break Contact":"No","Semi-Conductor Output":"No","acc. to IEC 60068-2-6":"10 ... 55 Hz: 0.35 mm","acc. to IEC 60068-2-27":"11g / 15 ms","OFF delay/instantaneous":"No","at AWG conductors solid":"2x (20 ... 14)","Relative repeat accuracy":"1 %","at AC-15 at 230 V typical":"100 000","at AWG conductors stranded":"2x (20 ... 14)","Pulse Delayed/Instantaneous":"No","Pulse-Shaping/Instantaneous":"No","Product function non-volatile":"No","Design of the surge suppressor":"with varistor","ON-delay/instantaneous contact":"No","additive ON delay/instantaneous":"No","ON-delay/OFF-delay/instantaneous":"No","Control supply voltage frequency 1":"50 ... 60 Hz","Star-Delta Circuit With Delay Time":"No","due to burst acc. to IEC 61000-4-4":"2 kV network connection / 1 kV control connection","Passing Break Contact/Instantaneous":"No","Product function star-delta circuit":"Yes","Protection against electrical shock":"finger-safe","Variably Clocked Start With Impulse":"No","Surge voltage resistance rated value":"4 000 V","Variably Clocked Start With Interval":"No","Reference code acc. to DIN EN 81346-2":"K","Fixed Clock Cycle Beginning With Pulse":"No","With Degree Of Pollution 3 Rated Value":"300 V","Finely Stranded With Core End Processing":"0.5 ... 2.5 m²","Fixed Clock Cycle Beginning With Interval":"No","For Auxiliary And Control Current Circuit":"screw-type terminals","Product extension optional remote control":"No","Product extension required remote control":"No","Flashing Symmetrically Starting With Pulse":"No","Passing Make Contact/Instantaneous Contact":"No","Design of the control terminal non-floating":"No","Flashing Asymmetrically Starting With Pulse":"No","Electrostatic discharge acc. to IEC 61000-4-2":"4 kV contact discharge / 8 kV air discharge","Flashing Symmetrically Starting With Interval":"No","Retriggerable With Deactivated Control Signal":"No","Type of voltage of the control supply voltage":"AC","Flashing Asymmetrically Starting With Interval":"No","Retrotriggerable With Activated Control Signal":"No","Size of contactor can be combined company-specific":"S00","due to conductor-earth surge acc. to IEC 61000-4-5":"2 kV","Removable Terminal For Auxiliary And Control Circuit":"No","Relative setting accuracy relating to full-scale value":"15 %","Flashing Symmetrically Starting With Pulse/Instantaneous":"No","Flashing Symmetrically Starting With Interval/Instantaneous":"No","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 4 A","Retrotriggerable With Activated Control Signal/Instantaneous Contact":"No","Product function at the relay outputs Switchover delayed/without delay":"No","Retrotriggerable With Deactivated Control Signal/Instantaneous Contact":"No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$72.87","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=363676&mlfb=3RT1916-2GD51","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1916-2GD51/alternatives.json"},"ai":{"faq":[{"question":"What is 3RT1916-2GD51 used for?","answer":"It is an auxiliary switch with an adjustable ON-delay timer, designed for star-delta motor starter circuits. It clips onto a SIRIUS contactor and provides a timed auxiliary contact that closes 1.5-30 seconds after coil energization."},{"question":"What are the key specifications of 3RT1916-2GD51?","answer":"Coil voltage is 200-240 V AC 50/60 Hz. Contact ratings: 1 A at 24 V, 0.2 A at 125 V, 0.1 A at 250 V. Adjustable time range 1.5-30 s, recovery time 150 ms. Dimensions: 45 mm wide, 38 mm high, 75 mm deep. Clip-on mount, IP20."},{"question":"Where can I buy 3RT1916-2GD51?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock level or price is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1916-2GD51","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/3RT1916-2GD51 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}}