{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1344-2BW40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1344-2BW40","canonicalUrl":"https://aoctrl.com/siemens/3RH1344-2BW40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1344-2BW40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 3RH1344-2BW40, 4 NO contacts, 24 VDC coil, 45 mm width, screw and snap-on mounting.","salesMarkdown":"It belongs to the SIRIUS family, size S00, which is the compact footprint for control loads up to around 10 A. Four normally-open instantaneous contacts give you four independent signal paths; no auxiliary switch, no delayed or make-before-break options on this variant. The headline rating is 10 A at AC-12, which covers resistive control loads like relay coils, indicator lamps, and PLC inputs. For inductive or motorised loads the contacts derate: 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, 1 A at 690 V. On DC switching the numbers drop faster — 10 A at 24 V, 1 A at 110 V, 0.27 A at 220 V — because DC arcs don't self-extinguish at zero-crossing. Shock resistance is 10g / 5 ms and 5g / 10 ms, meaning it holds contact continuity under moderate machine vibration but not heavy impact.","metaTitle":"3RH1344-2BW40 SIRIUS Auxiliary Contactor, 4 NO, 24 VDC, S00","metaDescription":"Siemens SIRIUS 3RH1344-2BW40 auxiliary contactor, 4 NO contacts, 24 VDC coil, size S00, 45 mm wide. AC-12 rated 10 A. Current lifecycle stage. Sourced to order against RFQ.","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":"48 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=126305&mlfb=3RH1344-2BW40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1344-2BW40/alternatives.json"},"ai":{"faq":[{"question":"What is the switching capacity of 3RH1344-2BW40 at different voltages?","answer":"At AC-12 (resistive loads) it's rated 10 A. For inductive AC loads: 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, 1 A at 690 V. For DC loads: 10 A at 24 V, 1 A at 110 V, 0.27 A at 220 V."},{"question":"What wire size does the 3RH1344-2BW40 accept?","answer":"The screw terminals accept 2x (0.25 to 2.5 mm²) solid or stranded conductors per clamp."},{"question":"Where can I buy 3RH1344-2BW40?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"Does 3RH1344-2BW40 have any delayed or make-before-break contacts?","answer":"No. All four contacts are instantaneous normally-open. There are no delayed, lagging, or make-before-break contacts on this variant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1344-2BW40","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/3RH1344-2BW40 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}}