{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1045-3AP06-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1045-3AP06-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RT1045-3AP06-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1045-3AP06-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S3, 3RT1045-3AP06-ZX95, 37 kW at 400 V AC-2, 66 A AC-4, screw terminals, snap-on mounting.","salesMarkdown":"## SIRIUS S3 Power Contactor — 37 kW AC-2, 66 A AC-4 The Siemens 3RT1045-3AP06-ZX95 is a SIRIUS power contactor in frame size S3, rated for 37 kW at 400 V in AC-2 duty (slip-ring motor starting) and 66 A in AC-4 duty (plugging/reversing). It lands on the critical path for any motor control panel where the load demands a contactor that can handle frequent inching or reversing — the AC-4 rating at 66 A tells you it's built for that abuse, not just across-the-line starts. Screw-type terminals on the main circuit accept stranded conductors up to 2x 50 mm² and solid wires 2x 0.25–2.5 mm². That's enough cross-section for the full 66 A AC-4 load without needing lug adapters — one less thing to chase before the outage window closes. Dimensions: 146 mm high, 90 mm wide, 139 mm deep. IP20 on the front with cover or box terminal; the terminal itself is IP00. In a panel with pollution degree 3 environment, that's expected — the enclosure provides the environmental seal. No washdown rating here; this is a dry-panel part. ## Switching Ratings and Mechanical Life Rated operational current at AC-1: 900 operations per hour maximum; AC-3 (squirrel-cage motor starting): 1,000 ops/h; AC-4: 300 ops/h. The AC-4 ceiling at 300 ops/h is the hard limit for reversing duty — exceed that and the arcing time of 10–15 ms starts eating the contacts faster than the 10 million typical mechanical operations would suggest. For a conveyor line doing one reverse cycle every 12 seconds, that's within margin; for a press with continuous jogging, size up. At 500 V, the contactor is rated for 45 kW; at 690 V, 21.1 kW. The 500 V figure is the higher power point — that's the one to use if your motor nameplate sits at 480–500 V. The auxiliary contact ratings cover 24 V at 10 A, 60 V at 2 A, 110 V at 1 A, 220 V at 0.3 A, and 230 V at 6 A. Note the 230 V 6 A rating is for the coil circuit, not the main poles.","metaTitle":"Siemens 3RT1045-3AP06-ZX95 SIRIUS Power Contactor, Size S3,","metaDescription":"Siemens 3RT1045-3AP06-ZX95 SIRIUS power contactor, size S3, rated 37 kW at 400 V AC-2, 66 A AC-4. Screw terminals, snap-on 35/75 mm DIN rail. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"139 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"90 mm","at AC":"10 ... 25 ms","Height":"146 mm","Stranded":"2x (10 ... 50 mm²)","at 50 Hz":"0.8 ... 1.1","Arcing Time":"10 ... 15 ms","On The Front":"IP20; IP20 on the front with cover / box terminal","1 Rated Value":"50 Hz","During Storage":"-55 ... +80 °C","Of The Terminal":"IP00","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","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm and 75 mm standard mounting rail","Size Of Contactor":"S3","Solid Or Stranded":"2x (2.5 ... 16 mm²)","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"power contactor","at 24 V rated value":"10 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 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":"230 V","at 500 V rated value":"45 kW","at 690 V rated value":"21.1 kW","Side-By-Side Mounting":"Yes","at 1000 V rated value":"37 W","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"37 kW","at AC-4 at 400 V rated value":"66 A","Substance Prohibitance (Date)":"05/01/2012","at 40 °C minimum permissible":"50 mm²","at 60 °C minimum permissible":"35 mm²","Insulation Voltage Rated Value":"1 000 V","at 230 V at 60 °C rated value":"38 kW","at 690 V at 60 °C rated value":"114 kW","at 1000 V at 60 °C rated value":"82 W","at AWG cables for main contacts":"2x (10 ... 1/0)","For Auxiliary And Control Circuit":"spring-loaded terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 160 A","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"fuse gL/gG: 250 A","at AWG cables for auxiliary contacts":"2x (24 ... 14)","operational current at AC-12 maximum":"10 A","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 (0.25 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Thermal Short-Time Current Limited To 10 S":"760 A","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","apparent holding power of magnet coil at AC":"22 VA","apparent pick-up power of magnet coil at AC":"270 VA","Type Of Voltage Of The Control Supply Voltage":"AC","Required Spacing For Grounded Parts At The Side":"6 mm","contact rating of auxiliary contacts according to UL":"A600 / Q600","Inductive Power Factor With Closing Power Of The Coil":"0.68","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.27","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=81726&mlfb=3RT1045-3AP06-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1045-3AP06-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RT1045-3AP06-ZX95?","answer":"The depth is 139 mm. That measurement is from the mounting surface to the furthest projection — verify against your enclosure depth, especially if you're adding a finger-safe cover."},{"question":"What solid wire sizes does the 3RT1045-3AP06-ZX95 accept?","answer":"The screw terminals accept solid conductors 2x (0.25... 2.5 mm²). For stranded, the range is 2x (10... 50 mm²)."},{"question":"Will 3RT1045-3AP06-ZX95 drop into a panel specified for 3RT1044-1FB46?","answer":"Both are SIRIUS size S3 contactors with the same DIN-rail footprint, so the mechanical fit is the same. The difference is in the coil voltage and auxiliary contact configuration — verify those match before swapping, or the panel won't pull in."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1045-3AP06-ZX95","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/3RT1045-3AP06-ZX95 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}}