{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2545-1NP30","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2545-1NP30","canonicalUrl":"https://aoctrl.com/siemens/3RT2545-1NP30","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2545-1NP30","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2545-1NP30 contactor, S3 frame size, 175-280 V AC 50/60 Hz coil, screw-type terminals, 70 mm width, DIN rail mounting.","salesMarkdown":"## Panel fit: 70 mm wide, 152 mm deep, with specific clearance needs The 3RT2545-1NP30: The mounting method accepts both screw fixing and snap-on — useful for retrofit into existing panels where the rail is already populated. Clearance requirements are 10 mm above and below, 10 mm to the sides, and zero forward or backward. The 10 mm side gap is the critical one for heat dissipation from the power poles; crowding closer than that derates the thermal capacity. ## Coil: 175-280 V AC, 3.1 VA, with 65 A inrush peak The coil is rated 175-280 V AC, 50/60 Hz, drawing 3.1 VA at both frequencies. That steady-state burden is low enough for a small control transformer, but the inrush peak hits 65 A — the PLC output or control relay driving this coil must handle that surge without welding contacts. Operate time is 38-57 ms on both AC and DC supplies, and the arcing time runs 10-20 ms. This consistency simplifies timing coordination with upstream motor-protective breakers or fuses. ## Auxiliary contacts: ratings across common control voltages An auxiliary switch is built in — no separate add-on block needed for basic status feedback. These numbers govern whether the contact can drive the downstream PLC input or indicator lamp without an interposing relay. ## Wiring: screw terminals for power and control circuits Power terminals accept stranded wire from 6 mm² up to 70 mm² (single conductor), or two conductors from 6-16 mm² and 10-50 mm². Control-circuit terminals take solid or stranded 0.5-2.5 mm², two per clamp. The screw-type coil terminals allow field replacement of the magnet coil without special tools. ## Environmental limits: -25 to +60 °C operating, 10 million mechanical cycles The mechanical endurance is 10 million cycles typical, and the maximum switching rate at AC-1 is 900 cycles per hour. For motor-load switching (AC-3), the electrical life will be lower and depends on the actual load current.","metaTitle":"Siemens 3RT2545-1NP30 SIRIUS Contactor, S3 Frame","metaDescription":"Siemens 3RT2545-1NP30 SIRIUS contactor, S3 size, 175-280 V AC coil, 70 mm wide, DIN rail mount. Active production. Quoted to order against RFQ.","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":"70 mm","at AC":"38 ... 57 ms","at DC":"38 ... 57 ms","Height":"140 mm","Upwards":"10 mm","Forwards":"0 mm","Stranded":"2x (6 ... 16 mm²), 2x (10 ... 50 mm²), 1x (10 ... 70 mm²)","at 50 Hz":"3.1 VA","at 60 Hz":"3.1 VA","Backwards":"0 mm","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","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","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":"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":"6 A","at 400 V rated value":"3 A","at 440 V rated value":"1.8 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":"0.1 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","Locked-Rotor Current Peak":"1.2 A","Relative Humidity Minimum":"10 %","Holding Current Mean Value":"10 mA","per NC contact rated value":"80 A","per NO contact rated value":"80 A","Of Main Circuit Rated Value":"8 kV","Substance Prohibitance (Date)":"09/01/2017","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","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gR: 250 A (690 V, 100 kA)","at 24 V per NC contact rated value":"100 A","at 24 V per NO contact rated value":"100 A","closing power of magnet coil at DC":"76 W","holding power of magnet coil at DC":"1.8 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","at 110 V per NC contact rated value":"100 A","at 110 V per NO contact rated value":"100 A","at 220 V per NC contact rated value":"7 A","at 220 V per NO contact rated value":"7 A","at 230 V per NC contact rated value":"22 kW","at 230 V per NO contact rated value":"22 kW","at 400 V per NC contact rated value":"37 kW","at 400 V per NO contact rated value":"37 kW","at 440 V per NC contact rated value":"0.42 A","at 440 V per NO contact rated value":"0.42 A","With Type Of Coordination 1 Required":"gG: 250 A (690 V, 100 kA)","operational current at AC-12 maximum":"10 A","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","number of NC contacts for main contacts":"2","number of NO contacts for main contacts":"2","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)","at ambient temperature 40 °C rated value":"125 A","at ambient temperature 60 °C rated value":"105 A","mirror contact according to IEC 60947-4-1":"Yes","apparent holding power of magnet coil at AC":"3.1 VA","apparent pick-up power of magnet coil at AC":"163 VA","Type Of Voltage Of The Control Supply Voltage":"AC/DC","for 3-phase AC motor at 460/480 V rated value":"30 hp","Limited To 1 S Switching At Zero Current Maximum":"1 080 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"1 080 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":"fuse gG: 10 A","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","AWG number as coded connectable conductor cross section for main contacts":"10 ... 2","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000","power loss [W] at AC-3 at 400 V for rated value of the operational current per conductor":"5.3 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/fb918960dd2a48789b6a44ffa1363bda.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=630098&mlfb=3RT2545-1NP30","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2545-1NP30/alternatives.json"},"ai":{"faq":[{"question":"What clearance is needed around this contactor in the panel?","answer":"Siemens specifies 10 mm clearance above and below, 10 mm to the sides, and zero forward or backward. The side gap is the critical one for thermal management."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2545-1NP30","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/3RT2545-1NP30 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}}