{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2045-1NE30","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2045-1NE30","canonicalUrl":"https://aoctrl.com/siemens/3RT2045-1NE30","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2045-1NE30","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, S3 frame, 3RT2045-1NE30, 48-80 VDC coil, screw-type terminals, 35 mm DIN rail mount, 10-2 main contacts, auxiliary switch included.","salesMarkdown":"It mounts on 35 mm DIN rail per DIN EN 60715 via screw or snap-on fastening, and the mounting position allows +/-180° rotation on a vertical surface plus +/-22.5° tilt forward or backward — handy when you're shoehorning it into a crowded enclosure and the rail isn't perfectly square. The coil accepts 48 to 80 VDC (rated value), with an inrush current peak of 1.1 A and a hold power of 3.5 VA at both 50 and 60 Hz. That's a broad pickup range, so you don't need a tightly regulated DC supply — a rectified bus or battery-backed rail will hold it in. Main contacts are rated for AC-1 (resistive) at 900 switching cycles per hour maximum, AC-3 (motor starting) at 1000 cycles/h, AC-4 (plugging/inching) at 300 cycles/h, and AC-3e (enhanced motor) also at 1000 cycles/h. The AC-3 figure tells you this contactor is sized for frequent motor starts on conveyors, pumps, or fans — not just occasional jogging. ## Wiring and integration notes Main power terminals accept solid wire from 2.5 to 16 mm² and stranded from 6 to 70 mm² — that's a wide range covering everything from control-circuit feeds to motor leads on a 30-40 A motor. Auxiliary terminals take 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded. Screw-type terminals throughout, so no special crimp tool needed on the van. Dimensions are 140 mm high, 70 mm wide, 152 mm deep. The 70 mm width is the S3 frame standard — it'll fit a standard 8-module DIN-rail slot. That forward clearance is the one to watch — 20 mm means you need room for the arc chamber to breathe, especially if you're running near the AC-4 cycle limit. The storage spec is wider because the contactor isn't dissipating heat in the box — if it's sitting in a cold warehouse, it'll be fine. The 60 °C operating ceiling means derate your enclosure ambient if it's near a heat source like a drive or transformer. It carries an auxiliary switch built in, so you don't need to order a separate side-mount block for feedback to the PLC or status indication on the panel door. The auxiliary contact ratings are 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, and 1 A at 110 V — enough to drive a small relay or a PLC input directly. The mechanical life is listed at 10,000,000 cycles typical. Arcing time is 10 to 20 ms, and the make/break times (both AC and DC) are 38 to 57 ms. Those numbers matter for coordination with upstream fuses or breakers — if the arcing time overlaps with a fast semiconductor fuse, you could lose the fuse on a normal start. For most motor circuits with standard gG fuses or thermal-magnetic breakers, it's fine. The contactor's main contact configuration is listed as \"10... 2\" — that's a 3-pole contactor with normally open main contacts, and the auxiliary is a 1 NO + 1 NC configuration. If you need more auxiliary contacts, you'll add a side-mount block, but the built-in set covers basic feedback.","metaTitle":"Siemens 3RT2045-1NE30 SIRIUS Power Contactor, 48-80 VDC Coil","metaDescription":"Siemens 3RT2045-1NE30 SIRIUS power contactor, S3 frame, 48-80 VDC coil, screw terminals, 35 mm DIN rail mount. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"152 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":"48 ... 80 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":"1.1 A","Product Designation":"Power contactor","at 24 V rated value":"10 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":"48 ... 80 V","at 500 V rated value":"2 A","at 60 Hz rated value":"48 ... 80 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":"2.3 A","Relative Humidity Minimum":"10 %","Holding Current Mean Value":"15 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":"50 µs","Locked-Rotor Current Mean Value":"0.8 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":"1","number of NO contacts for auxiliary contacts instantaneous contact":"1","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=629806&mlfb=3RT2045-1NE30","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2045-1NE30/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for the 3RT2045-1NE30?","answer":"As a SIRIUS series product, it carries CE marking for the European market and is designed to meet IEC/EN 60947-4-1 for contactors. RoHS and REACH declarations are available from Siemens standard documentation. UL/CSA listings are typical for this series but verify against your specific certification needs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2045-1NE30","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/3RT2045-1NE30 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}}