{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1344-1BF40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1344-1BF40","canonicalUrl":"https://aoctrl.com/siemens/3RH1344-1BF40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1344-1BF40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, auxiliary contactor, 3RH1344-1BF40, 110 V DC coil, 4 NO instantaneous contacts, size S00, IP20 front, screw and snap-on mounting.","salesMarkdown":"The Siemens 3RH1344-1BF40 is a SIRIUS auxiliary contactor with a 110 V DC coil and 4 NO instantaneous contacts. Its size S00 footprint is 45 mm wide, 57.5 mm tall, and 111 mm deep. The 110 V DC coil draws a closing and holding power of 3.2 W — a steady-state load the control transformer or DC supply must cover. The 4 NO contacts are rated for utilization categories typical of auxiliary contactors: the 10 A at 24 V covers DC control loads; the 6 A at 230 V and 3 A at 400 V cover AC signal switching.","metaTitle":"Siemens 3RH1344-1BF40 SIRIUS Auxiliary Contactor, 110 V Coil","metaDescription":"Siemens SIRIUS 3RH1344-1BF40 auxiliary contactor with 110 V DC coil, 4 instantaneous NO contacts, size S00. IP20 front. Current lifecycle. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"111 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Width":"45 mm","Height":"57.5 mm","Rated Value":"110 V","Initial Value":"0.8","Leading Contact":"0","lifecycle_stage":"current","Fastening Method":"screw and snap-on mounting","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","Contact Reliability":"one incorrect switching operation of 100 million switching operations (17 V, 1 mA)","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","Substance Prohibitance (Date)":"01.07.2006 00:00:00","protection class IP on the front":"IP20","Ambient Temperature During Storage":"-55 ... +80 °C","Product Extension Auxiliary Switch":"No","closing power of magnet coil at DC":"3.2 W","holding power of magnet coil at DC":"3.2 W","reference code acc. to IEC 81346-2":"K","Ambient Temperature During Operation":"-25 ... +60 °C","Ambient Temperature During Transport":"-55 ... +80 °C","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","with low demand rate acc. to SN 31920":"40 %","with high demand rate acc. to SN 31920":"75 %","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Touch Protection Against Electrical Shock":"finger-safe","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","B10 value with high demand rate acc. to SN 31920":"1 000 000; With 0.3 x Ie","Identification Number And Letter For Switching Elements":"44 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Required Spacing With Side-By-Side Mounting At The Side":"0 mm","Type Of Electrical Connection For Auxiliary And Control Circuit":"screw-type terminals","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Design Of The Fuse Link 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=136187&mlfb=3RH1344-1BF40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1344-1BF40/alternatives.json"},"ai":{"faq":[{"question":"What is 3RH1344-1BF40's listed depth?","answer":"The depth is 111 mm. Combined with the 45 mm width and 57.5 mm height, it occupies the standard S00 DIN-rail footprint."},{"question":"What solid conductor sizes does 3RH1344-1BF40 accept?","answer":"It accepts 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and 2x 4 mm² solid conductors."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1344-1BF40","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/3RH1344-1BF40 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}}