{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2628-1NB35","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2628-1NB35","canonicalUrl":"https://aoctrl.com/siemens/3RT2628-1NB35","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2628-1NB35","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2628-1NB35 contactor relay, 21-28 V AC/DC coil, screw-type terminals, 45 mm width, 150 mm height, 165 mm depth, DIN-rail mounting.","salesMarkdown":"## Siemens 3RT2628-1NB35 — SIRIUS Contactor Relay, 21-28 V AC/DC Coil The Siemens 3RT2628-1NB35 is a SIRIUS contactor relay with a 21-28 V AC/DC coil, screw-type terminals, and a 45 mm width that snaps onto 35 mm DIN rail per DIN EN 50022. Its 165 mm depth and 150 mm height fit standard panel layouts, and the mounting position allows +/-180° rotation on a vertical surface plus +/-22.5° tilt forward or backward. ## Contact Ratings and Switching Capacity The auxiliary contacts are rated 6 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V — covering control-circuit voltages from 24 VDC up to 690 VAC. Maximum switching frequency varies by voltage: 100 operations per hour at 230/240/400 V, dropping to 36 per hour at 690 V, which governs the relay's duty cycle in high-voltage switching applications. Screw-type coil terminals accept solid conductors: 2x (0.5-1.5 mm²), 2x (0.75-2.5 mm²), or 2x 4 mm². Stranded conductors: 2x (1-2.5 mm²) or 2x (2.5-10 mm²). Power-side terminals accept 1x 16 mm² at 40 °C or 1x 25 mm² at 60 °C, allowing flexibility in main-circuit wiring gauge based on ambient temperature.","metaTitle":"Siemens 3RT2628-1NB35 Contactor Relay, 21-28 V AC/DC, 45 mm","metaDescription":"Siemens 3RT2628-1NB35 contactor relay, 21-28 V AC/DC coil, 45 mm width, screw-type terminals. Current lifecycle stage. Available to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"165 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Width":"45 mm","at AC":"30 ... 50 ms","at DC":"30 ... 50 ms","title":"3RT2628-1NB35","Height":"150 mm","at 24 V":"6 A","at 60 V":"2 A","Stranded":"2x (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²)","at 110 V":"1 A","at 125 V":"0.9 A","at 220 V":"0.3 A","at 230 V":"6 A","at 400 V":"3 A","at 50 Hz":"0.7 ... 1.3","at 60 Hz":"0.7 ... 1.3","at 690 V":"1 A","at 40 °C":"1x 16 mm²","at 60 °C":"1x 25 mm²","Attachable":"0","Arcing Time":"10 ... 10 ms","Rated Value":"21 ... 28 V","description":"capacitor contactor, AC-6b 33 kVAr, / 400 V, 3-pole, 21-28 V AC/DC, 50/60 Hz, with integrated varistor, auxiliary contacts: 1 NO + 2 NC, screw terminal, size: S0","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","Initial Value":"0.7","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","Type Of Voltage":"AC/DC","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 50022","Full-Scale Value":"1.3","at 230 V maximum":"100 1/h","at 240 V maximum":"100 1/h","at 400 V maximum":"100 1/h","at 480 V maximum":"70 1/h","at 500 V maximum":"65 1/h","at 600 V maximum":"45 1/h","at 690 V maximum":"36 1/h","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 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Product Brand Name":"SIRIUS","Inrush Current Peak":"3 A","Product Designation":"capacitor contactors","at 50 Hz rated value":"21 ... 28 V","at 60 Hz rated value":"21 ... 28 V","Instantaneous Contact":"1","For Main Current Circuit":"screw-type terminals","Locked-Rotor Current Peak":"0.52 A","Relative Humidity Minimum":"10 %","Holding Current Mean Value":"45 mA","Of Main Circuit Rated Value":"6 kV","Substance Prohibitance (Date)":"05/01/2014","For Grounded Parts At The Side":"10 mm","Duration Of Inrush Current Peak":"30 µs","Locked-Rotor Current Mean Value":"0.3 A","Duration Of Locked-Rotor Current":"180 ms","Of Auxiliary Circuit Rated Value":"6 kV","For Auxiliary And Control Circuit":"screw-type terminals","at DC at 24 V maximum permissible":"16 mA","Product Extension Auxiliary Switch":"No","at AC at 230 V maximum permissible":"7 mA","closing power of magnet coil at DC":"5.9 W","holding power of magnet coil at DC":"1.4 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","With Side-By-Side Mounting At The Side":"10 mm","Electrical Endurance (Operating Cycles)":"150 000","number of NC contacts for main contacts":"0","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), 2x (0.75 ... 2.5 mm²)","Number Of Poles For Main Current Circuit":"3","Contact Reliability Of Auxiliary Contacts":"0.00000001","mirror contact according to IEC 60947-4-1":"No","apparent holding power of magnet coil at AC":"2 VA","apparent pick-up power of magnet coil at AC":"6.7 VA","number of NC contacts for auxiliary contacts":"2","number of NO contacts for auxiliary contacts":"1","Type Of Voltage Of The Control Supply Voltage":"AC/DC","contact rating of auxiliary contacts according to UL":"A600 / Q600","Inductive Power Factor With Closing Power Of The Coil":"0.98","Of Main Circuit With Degree Of Pollution 3 Rated Value":"690 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.86","Of The Contactor With Added Auxiliary Switch Block Typical":"3 000 000","operational current of auxiliary contacts at AC-12 maximum":"10 A","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)","AWG number as coded connectable conductor cross section for main contacts":"10 ... 4","For Short-Circuit Protection Of The Main Circuit With Type Of Coordination 1 Required":"gG: 100 A (690 V, 50 kA)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/36dd2efac410d81a7399adb948b76e7c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=260620&mlfb=3RT2628-1NB35"},"ai":{"faq":[{"question":"What is the coil voltage for 3RT2628-1NB35?","answer":"The coil is rated 21-28 V AC/DC with screw-type terminals."},{"question":"Will 3RT2628-1NB35 drop into a panel specified around 3RT2326-1BK80?","answer":"Both are SIRIUS contactor relays on the same 45 mm DIN-rail footprint, so the mechanical fit is identical. Verify the coil voltage and contact ratings against your BOM — the 3RT2628-1NB35 uses a 21-28 V AC/DC coil, while the 3RT2326-1BK80 may differ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2628-1NB35","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/3RT2628-1NB35 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}}