{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1344-1DB40-0KA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1344-1DB40-0KA0","canonicalUrl":"https://aoctrl.com/siemens/3RH1344-1DB40-0KA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1344-1DB40-0KA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 24 V DC coil, 4 NO contacts, screw and snap-on mounting, IP20 front, 45 x 57.5 x 111 mm.","salesMarkdown":"## SIRIUS 3RH1344-1DB40-0KA0 — Auxiliary Contactor, 24 V DC, 4 NO Its 24 V DC coil draws 3.2 W for both closing and holding, with an integrated varistor surge suppressor across the coil terminals — no external suppression diode needed for DC switching, which simplifies panel wiring and BOM count. The contact block provides four normally open (NO) instantaneous contacts rated for operational currents that vary with voltage: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V. Mechanical endurance is rated at 10 million operating cycles, with contact reliability specified as one incorrect switching operation per 100 million operations at 17 V, 1 mA. The 45 mm width (3 SBE — 3 standard width units) fits standard S00 contactor spacing. Mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward, giving flexibility in tight enclosures. ## Terminal Wiring and Environmental Limits Solid conductor cross-sections accepted: 2x 0.5…1.5 mm², 2x 0.75…2.5 mm², and 2x 4 mm². Operating temperature range is -25 to +60 °C; storage and transport range is -55 to +80 °C. Shock resistance is 10g / 5 ms and 5g / 10 ms.","metaTitle":"Siemens 3RH1344-1DB40-0KA0 SIRIUS Auxiliary Contactor, 24 V","metaDescription":"Siemens SIRIUS 3RH1344-1DB40-0KA0 auxiliary contactor, size S00, 24 V DC coil, 4 NO contacts, screw/snap-on mounting, IP20 front. Current lifecycle. Sourced to order.","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":"24 V","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-55 ... +80 °C","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)":"07/01/2006","Design Of The Surge Suppressor":"with varistor","protection class IP on the front":"IP20","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","Surge Voltage Resistance Rated Value":"6 kV","operational current at AC-12 maximum":"10 A","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","reference code according to IEC 81346-2":"K","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","with low demand rate according to SN 31920":"40 %","Of Auxiliary Contacts Instantaneous Contact":"0","with high demand rate according to SN 31920":"75 %","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","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=464361&mlfb=3RH1344-1DB40-0KA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1344-1DB40-0KA0/alternatives.json"},"ai":{"faq":[{"question":"What is the coil voltage and power consumption of 3RH1344-1DB40-0KA0?","answer":"The coil is rated 24 V DC with a closing and holding power of 3.2 W. An integrated varistor surge suppressor is included across the coil."},{"question":"What contact configuration does this auxiliary contactor have?","answer":"It has 4 normally open (NO) instantaneous contacts. There are no NC, delayed, lagging, or make-before-break contacts on this variant."},{"question":"What are the rated operational currents at different voltages?","answer":"Rated operational current is 10 A at 24 V, 1 A at 110 V, 0.27 A at 220 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V."},{"question":"Where can I buy 3RH1344-1DB40-0KA0 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for volume or single-unit requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1344-1DB40-0KA0","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/3RH1344-1DB40-0KA0 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}}