{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1344-1AV00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1344-1AV00","canonicalUrl":"https://aoctrl.com/siemens/3RT1344-1AV00","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1344-1AV00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S3 power contactor, 3RT1344-1AV00, 42 kW at 230 V, 400 V 50 Hz coil, screw-type terminals, IP20 front, size S3 frame.","salesMarkdown":"The Siemens 3RT1344-1AV00 is a SIRIUS S3 power contactor rated for motor switching at 42 kW at 230 V at 60 °C, with a rated operational voltage of 400 V at 50 Hz. The coil operating range spans 0.8 to 1.1 times the rated voltage at 50 Hz, which means the coil holds in reliably down to 320 V on a 400 V nominal system — a margin that matters when the bus sags under a large motor start. Its insulation voltage is rated at 1 000 V and surge voltage resistance at 6 kV. The contactor measures 146 mm high by 93 mm wide by 139 mm deep. That 139 mm depth is the dimension to check against your enclosure back-panel clearance, especially if you are retrofitting into an existing cabinet where the gland plate or door-mounted devices limit reach. Front protection is IP20 with the cover or box terminal installed; the terminal itself is IP00. In a panel with IP54 or better overall rating, the IP20 front is adequate for finger-safe touch protection during commissioning. Solid wire capacity covers 2x (0.5... 1.5 mm²), 2x (0.75... 2.5 mm²), and up to 2x (0.75... 4 mm²). Stranded conductors accept 2x (10... 50 mm²). Auxiliary and control circuits also terminate on screw-type terminals, with solid or stranded capacity of 2x (2.5... 16 mm²). This keeps the same tooling across both power and control wiring. ## Switching performance and coordination For resistive loads at AC-1, the maximum switching frequency is 1 000 cycles per hour, which is adequate for most conveyor and pump cycling but not for high-speed indexing applications. The arcing time is the interval the contacts carry current after the coil drops out; for Type 2 coordination (no-weld requirement), the evidence specifies a fuse of 125 A gL/gG. That fuse rating is the one to coordinate with upstream protection if you are designing for selectivity. DC switching capacity is derated significantly from the AC ratings: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, and 6 A at 230 V (likely AC-3 or AC-4 duty at that voltage). The 400 V DC rating is 3 A. For any DC load above these levels, you would need a DC-rated contactor or a series arc-suppression network.","metaTitle":"Siemens 3RT1344-1AV00 SIRIUS Power Contactor, S3, 42 kW at 2","metaDescription":"Siemens 3RT1344-1AV00 SIRIUS S3 power contactor, 42 kW at 230 V, 400 V 50 Hz coil, screw terminals, IP20 front, current production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"139 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"93 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":"1 000 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":"400 V","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","Substance Prohibitance (Date)":"05/01/2012","at 40 °C minimum permissible":"35 mm²","at 60 °C minimum permissible":"35 mm²","Insulation Voltage Rated Value":"1 000 V","at 230 V at 60 °C rated value":"42 kW","at AWG cables for main contacts":"2x (10 ... 1/0)","For Auxiliary And Control Circuit":"screw-type terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 125 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 (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","number of NC contacts for main contacts":"0","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)","Thermal Short-Time Current Limited To 10 S":"600 A","Finely Stranded Without Core End Processing":"2x (10 ... 35 mm²)","apparent holding power of magnet coil at AC":"21 VA","apparent pick-up power of magnet coil at AC":"218 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":"0.61","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.26","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":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0","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=335769&mlfb=3RT1344-1AV00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1344-1AV00/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RT1344-1AV00?","answer":"The depth is 139 mm. This is the dimension from the mounting rail face to the furthest projection of the contactor body, not including any protruding wiring or cover."},{"question":"What are the solid wire capacities for the main terminals?","answer":"Solid wire capacity is 2x (0.5... 1.5 mm²), 2x (0.75... 2.5 mm²), and maximum 2x (0.75... 4 mm²). The terminals accept two conductors per clamp."},{"question":"What compliance documentation is available for 3RT1344-1AV00?","answer":"The part is RoHS compliant with a substance prohibition date of 05/01/2012. As a SIRIUS product, it typically carries UL, CSA, CE, and IEC certifications, though the specific approval marks are not listed in this evidence. Request the manufacturer's declaration of conformity or the product certificate for your jurisdiction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1344-1AV00","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/3RT1344-1AV00 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}}