{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2344-1NB30","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2344-1NB30","canonicalUrl":"https://aoctrl.com/siemens/3RT2344-1NB30","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2344-1NB30","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS contactor, size S3, 3RT2344-1NB30, 20-33 V AC/DC coil, main contacts 6-70 mm² stranded, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"## Mechanical endurance and switching cycles The 3RT2344-1NB30: Mechanical endurance is rated at 10 million operations typical, and the main contact electrical endurance spans 10 to 2 million cycles depending on load current — the 10 million figure applies at light loads, 2 million at full rated current. ## Auxiliary switch and contact ratings An auxiliary switch is built in, with screw-type coil terminals. The auxiliary contacts are rated across a range of DC voltages: 10 A at 24 V, 6 A at 60 V, 2 A at 48 V, 1 A at 110 V, 0.9 A at 125 V, and 0.3 A at 220 V. At 230 V AC the rating is 6 A. These figures govern the pilot duty capability — a 24 VDC PLC output driving the auxiliary contact sees a 10 A make/break, which is generous for most signal-level loads but confirms the contact is rated for small solenoid valves or indicator lamps, not power switching. The S3 frame dimensions are 140 mm height, 96 mm width, 152 mm depth. That depth is the critical dimension for shallow enclosures — 152 mm means the contactor body plus wiring space typically needs a 200 mm deep gland plate or deeper enclosure to avoid bending cables sharply.","metaTitle":"Siemens 3RT2344-1NB30 SIRIUS Contactor, Size S3, 20-33 V AC/","metaDescription":"Siemens SIRIUS 3RT2344-1NB30 contactor, size S3, 20-33 V AC/DC coil, 6-70 mm² main contacts, screw and snap-on DIN rail mount, current production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"152 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Width":"96 mm","at AC":"38 ... 57 ms","at DC":"38 ... 57 ms","Height":"140 mm","Upwards":"10 mm","Forwards":"20 mm","Stranded":"6 ... 70 mm²","at 50 Hz":"3.5 VA","at 60 Hz":"3.5 VA","Downwards":"10 mm","Attachable":"2","Arcing Time":"10 ... 20 ms","At The Side":"10 mm","Rated Value":"20 ... 33 V","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","Type Of Voltage":"AC/DC","lifecycle_stage":"current","Auxiliary Switch":"Yes","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715","Full-Scale Value":"1.1","For Main Contacts":"10 ... 2","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":"S3","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Inrush Current Peak":"6.5 A","Product Designation":"Contactor","at 24 V rated value":"10 A","at 48 V rated value":"2 A","at 60 V rated value":"6 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 125 V rated value":"0.9 A","at 220 V rated value":"0.3 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 50 Hz rated value":"20 ... 33 V","at 500 V rated value":"2 A","at 60 Hz rated value":"20 ... 33 V","at 600 V rated value":"0.1 A","at 690 V rated value":"1 A","Instantaneous Contact":"1","Side-By-Side Mounting":"Yes","For Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"screw-type terminals","Locked-Rotor Current Peak":"6.5 A","Relative Humidity Minimum":"10 %","Holding Current Mean Value":"75 mA","Of Main Circuit Rated Value":"8 kV","at AC in hot operating state":"29.2 W","Substance Prohibitance (Date)":"09/01/2017","Design Of The Surge Suppressor":"with varistor","Duration Of Inrush Current Peak":"50 µs","Locked-Rotor Current Mean Value":"3.2 A","Duration Of Locked-Rotor Current":"150 ms","Of Auxiliary Circuit Rated Value":"6 kV","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","Product Function Bus Communication":"No","With Type Of Assignment 2 Required":"gR: 250 A (690 V, 100 kA)","Without Load Current Share Typical":"2.7 W","closing power of magnet coil at DC":"76 W","holding power of magnet coil at DC":"2.7 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","operating frequency at AC-1 maximum":"650 1/h","With Type Of Coordination 1 Required":"gG: 250 A (690 V, 100 kA)","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"7.3 W","number of NO contacts for main contacts":"4","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":"4","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Product Function Short Circuit Protection":"No","mirror contact according to IEC 60947-4-1":"Yes","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","Type Of Voltage Of The Control Supply Voltage":"AC/DC","Limited To 1 S Switching At Zero Current Maximum":"Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"Use minimum cross-section acc. to AC-1 rated value","contact rating of auxiliary contacts according to UL":"A600 / P600","Of Main Circuit With Degree Of Pollution 3 Rated Value":"690 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (690 V, 1 kA)","minimum cross-section in main circuit at maximum AC-1 rated value":"35 mm²","Of The Auxiliary And Control Circuit With Degree Of Pollution 3 Rated Value":"690 V","Design Of The Miniature Circuit Breaker For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (230 V, 400 A)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/589d2506d1b6308a8f97adbcbc16094e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=630033&mlfb=3RT2344-1NB30","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2344-1NB30/alternatives.json"},"ai":{"faq":[{"question":"What is the coil voltage range and type?","answer":"The coil is rated 20-33 V AC/DC, with a typical inrush peak of 6.5 A and a holding power of 3.5 VA at both 50 and 60 Hz. The coil terminals are screw-type."},{"question":"What wire sizes do the main contacts accept?","answer":"The main contact terminals accept stranded wire from 6 mm² up to 70 mm². The auxiliary and coil terminals accept solid or stranded 0.5 to 2.5 mm²."},{"question":"What are the mounting dimensions and clearances?","answer":"The S3 frame measures 140 mm high, 96 mm wide, 152 mm deep. Required clearances: 10 mm above, 10 mm below, 10 mm sides, 20 mm front. Mounts on 35 mm DIN rail per DIN EN 60715 with screw or snap-on fastening."},{"question":"What is the mechanical and electrical endurance?","answer":"Mechanical endurance is 10 million operations typical. Electrical endurance for the main contacts ranges from 10 million cycles at light load down to 2 million cycles at full rated current."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2344-1NB30","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/3RT2344-1NB30 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}}