{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2045-1NP34","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2045-1NP34","canonicalUrl":"https://aoctrl.com/siemens/3RT2045-1NP34","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2045-1NP34","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S3, 3RT2045-1NP34, 175-280 VAC coil, screw-type terminals, 10-2 main contacts, auxiliary switch included.","salesMarkdown":"## Siemens SIRIUS 3RT2045-1NP34 — Power Contactor, Size S3 It carries a rated control supply voltage of 175... 280 V at 50/60 Hz, with a coil inrush peak of 65 A and a holding power draw of 3.5 VA at both 50 Hz and 60 Hz. The pick-up threshold is 0.8 times the rated value, and the drop-out threshold is 1.1 times the full-scale value — meaning the coil reliably picks at 140 V and drops out at 308 V, giving a clean hysteresis band for noisy line conditions. Main contacts are rated for 10 poles normally open and 2 poles normally closed (10-2 configuration), with an auxiliary switch built in. The contactor mounts via screw and snap-on onto a 35 mm DIN rail per DIN EN 60715, and the mounting position allows +/-180° rotation on a vertical surface plus +/-22.5° tilt forward/backward — useful when panel layout forces an unconventional orientation. ## Switching Rates and Duty Cycles Maximum switching rates are duty-dependent: 900 operations per hour under AC-1 (resistive), 400/h under AC-2 (slip-ring motors), 1000/h under AC-3 (squirrel-cage motors — standard starting), and 300/h under AC-4 (plugging/reversing/inching). The AC-3e rating matches the AC-3 maximum at 1000/h. These rates govern thermal rise in the coil and arc chamber; exceeding them in a high-duty application will shorten contact life. ## Termination and Clearance Main circuit terminals accept solid conductors of 2.5... 16 mm² and stranded conductors of 6... 70 mm² — the stranded range covers the heavier cable typically run for motor feeders at this contactor size. Auxiliary circuit terminals accept 2x (0.5... 1.5 mm²) or 2x (0.75... 2.5 mm²) solid or stranded. All terminals are screw-type.","metaTitle":"Siemens 3RT2045-1NP34 SIRIUS Power Contactor, S3, 175-280 VA","metaDescription":"Siemens SIRIUS 3RT2045-1NP34 power contactor, size S3, screw terminals, 175-280 VAC coil, 10-2 main contacts. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"195 mm","Solid":"2.5 ... 16 mm²","Width":"70 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","Arcing Time":"10 ... 20 ms","At The Side":"10 mm","Rated Value":"175 ... 280 V","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","at AC-1 maximum":"900 1/h","at AC-2 maximum":"400 1/h","at AC-3 maximum":"1 000 1/h","at AC-4 maximum":"300 1/h","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","at AC-3e maximum":"1 000 1/h","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":"65 A","Product Designation":"Power contactor","at 24 V rated value":"6 A","at 48 V rated value":"2 A","at 60 V rated value":"2 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":"15 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.8 A","at 480 V rated value":"77 A","at 50 Hz rated value":"175 ... 280 V","at 500 V rated value":"2 A","at 60 Hz rated value":"175 ... 280 V","at 600 V rated value":"62 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","at 1000 V rated value":"37 kW","For Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"7.5 hp","at 200/208 V rated value":"25 hp","at 220/230 V rated value":"30 hp","at 460/480 V rated value":"60 hp","at 575/600 V rated value":"60 hp","Locked-Rotor Current Peak":"1.2 A","Relative Humidity Minimum":"10 %","Holding Current Mean Value":"10 mA","Of Main Circuit Rated Value":"8 kV","Safety-Related Switching On":"No","at AC-3 rated value maximum":"1 000 V","at AC in hot operating state":"15.9 W","at AC-2 at 400 V rated value":"37 kW","at AC-3e rated value maximum":"1 000 V","at AC-4 at 400 V rated value":"66 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"03/01/2017","Design Of The Surge Suppressor":"with varistor","Duration Of Inrush Current Peak":"5 µs","Locked-Rotor Current Mean Value":"0.44 A","Duration Of Locked-Rotor Current":"150 ms","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"110 A","at AC-5b up to 400 V rated value":"80 A","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 160A (690V,100kA), aM: 80A (690V,100kA), BS88: 125A (415V,80kA)","Without Load Current Share Typical":"3.5 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","With Type Of Coordination 1 Required":"gG: 250 A (690 V, 100 kA), aM: 160 A (690 V, 100 kA), BS88: 200 A (415 V, 80 kA)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"5.3 W","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","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":"1 faulty switching per 100 million (17 V, 1 mA)","mirror contact according to IEC 60947-4-1":"Yes","with low demand rate according to SN 31920":"40 %","with high demand rate according to SN 31920":"73 %","Type Of Voltage Of The Control Supply Voltage":"AC/DC","Limited To 1 S Switching At Zero Current Maximum":"1 500 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"1 186 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"851 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"538 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"423 A; 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":"1 000 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","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)","minimum cross-section in main circuit at maximum AC-1 rated value":"50 mm²","number of NC contacts for auxiliary contacts instantaneous contact":"2","number of NO contacts for auxiliary contacts instantaneous contact":"2","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7d28fa7380658c541019ac8751bc4da6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629810&mlfb=3RT2045-1NP34","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2045-1NP34/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RT2045-1NP34?","answer":"Submit an RFQ through the storefront. Pricing and stock levels are confirmed at quote time — no real-time figures are published on this listing."},{"question":"What is 3RT2045-1NP34's listed depth?","answer":"The depth is 195 mm. This is the dimension from the DIN rail mounting surface to the furthest forward point of the contactor body."},{"question":"What conductor ranges does 3RT2045-1NP34 accept?","answer":"Main terminals accept solid conductors 2.5... 16 mm² and stranded conductors 6... 70 mm². Auxiliary terminals accept 2x (0.5... 1.5 mm²) or 2x (0.75... 2.5 mm²) solid or stranded."},{"question":"What compliance documentation does Siemens provide for 3RT2045-1NP34?","answer":"As a SIRIUS product, Siemens typically provides RoHS, REACH, and CE declarations, plus UL/CSA certifications per the specific variant. The evidence does not list individual certs for this order code; verify the specific compliance package with the datasheet or your Siemens contact."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2045-1NP34","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/3RT2045-1NP34 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}}