{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1344-2BC40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1344-2BC40","canonicalUrl":"https://aoctrl.com/siemens/3RH1344-2BC40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1344-2BC40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, auxiliary contactor, size S00, 3RH1344-2BC40, 4 NO instantaneous contacts, 10 A AC-12, screw and snap-on mounting, 45 mm width.","salesMarkdown":"It is rated 10 A at AC-12 for resistive loads and switches control circuits up to 690 V. The part is at a current-production lifecycle stage. ## Ratings and environmental limits Pollution degree 3 suits industrial environments. Front face carries IP20 finger protection. Withstands shock at 10g / 5 ms and 5g / 10 ms. Surge voltage resistance rated at 6 kV. ## Coil and contact ratings DC magnet coil draws 3.2 W at both closing and holding. AC-15 switching capacity at 230 V is 6 A; at 400 V it is 3 A; at 500 V it is 2 A; at 690 V it is 1 A. Rated operational current at AC-12 is 10 A. The solid connection accepts 2x (0.25 to 2.5 mm²) conductors. The lifecycle stage is current production.","metaTitle":"Siemens 3RH1344-2BC40 SIRIUS Auxiliary Contactor, 4 NO, 45 m","metaDescription":"Siemens SIRIUS 3RH1344-2BC40 auxiliary contactor, size S00, 4 NO contacts, 10 A AC-12, 45 mm width, screw and snap-on mounting. Current-production lifecycle stage. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"114 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"60 mm","Maximum":"2 000 m","At The Side":"0 mm","Rated Value":"30 V","On The Front":"IP20","Initial Value":"0.8","Mounting type":"screw and snap-on mounting","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","Auxiliary switch":"No","During Operation":"-25 ... +60 °C","During Transport":"-55 ... +80 °C","Full-scale value":"1.1","Shock resistance":"10g / 5 ms and 5g / 10 ms","Delayed Switching":"0","Lagging Switching":"0","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":"S00","Product brand name":"SIRIUS","Degree of pollution":"3","Product designation":"Auxiliary contactor","at 24 V rated value":"10 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.27 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 500 V rated value":"2 A","at 690 V rated value":"1 A","Instantaneous Contact":"4","For Auxiliary Contacts":"0","Make-Before-Break Switching":"0","Closing power of magnet coil at DC":"3.2 W","Holding power of magnet coil at DC":"3.2 W","Operating current at AC-12 maximum":"10 A","Surge voltage resistance rated value":"6 kV","Reference code acc. to DIN EN 61346-2":"K","Reference code acc. to DIN EN 81346-2":"K","with low demand rate acc. to SN 31920":"40 %","With Degree Of Pollution 3 Rated Value":"690 V","with high demand rate acc. to SN 31920":"75 %","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","at AWG conductors for auxiliary contacts":"2x (24 ... 14)","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"Cage Clamp terminals","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Of Auxiliary Contacts Instantaneous Contact":"0","Number of NC contacts for auxiliary contacts":"4","Number of NO contacts for auxiliary contacts":"4","Type of voltage of the control supply voltage":"DC","Identification number and letter for switching elements":"44 E","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A"}},"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=534064&mlfb=3RH1344-2BC40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1344-2BC40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RH1344-2BC40 and what is the lead time?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the closest functional second-source for 3RH1344-2BC40?","answer":"The 3RT1015-1BB42 and 3RT1016-1BB42 are power contactors in the same SIRIUS size S00 family, but they are not direct functional equivalents — this auxiliary contactor has only NO auxiliary contacts and no main power poles. The 3RH2140-1BP40 is a similar auxiliary contactor variant but with a different contact configuration."},{"question":"What is 3RH1344-2BC40's listed depth?","answer":"The depth is 114 mm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1344-2BC40","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/3RH1344-2BC40 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}}