{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1344-1AN20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1344-1AN20","canonicalUrl":"https://aoctrl.com/siemens/3RH1344-1AN20","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1344-1AN20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, 3RH1344-1AN20, Size S00, 4 NO + 0 NC, screw and snap-on mounting, 45 mm width, IP20 front, rated 10 A at 24 V.","salesMarkdown":"The Siemens 3RH1344-1AN20 is a SIRIUS auxiliary contactor in Size S00, meaning it's the smallest frame in the SIRIUS family — 45 mm wide, 57.5 mm tall, 111 mm deep — designed for control-circuit switching in a DIN-rail panel. Four normally-open instantaneous contacts and no normally-closed, so it's a straight make-only block: use it where you need to multiply a signal or enable multiple loads from one PLC or relay output, not where you need a break before a make. Rated operational current is 10 A at 24 V, dropping to 6 A at 230 V and 3 A at 400 V, with a surge voltage resistance of 6 kV. That 6 kV impulse withstand tells you it's rated for IEC 60947-1 overvoltage category III in a 400 V distribution panel — it won't flash over during a lightning surge on the control transformer secondary. Contact reliability is spec'd at one incorrect switching operation per 100 million cycles at 17 V, 1 mA. ## Mounting and environment — what the panel builder needs That's useful when you're shoehorning it into a crowded gland plate or a swing-frame subpanel where the rail isn't perfectly vertical. Shock resistance is 10g for 5 ms and 5g for 10 ms — enough for machine-mounted panels near presses or conveyors, but not for direct mounting on a vibrating screen deck. Terminal capacity accepts 2x 0.5 to 1.5 mm², 2x 0.75 to 2.5 mm², or 2x 4 mm² solid. That covers most control-circuit wiring — 1.5 mm² for internal panel runs, 2.5 mm² for longer pulls to remote pushbuttons, and 4 mm² if you're paralleling contacts for high-availability circuits.","metaTitle":"Siemens 3RH1344-1AN20 SIRIUS Auxiliary Contactor, 4 NO, Size","metaDescription":"Siemens 3RH1344-1AN20 SIRIUS auxiliary contactor, 4 NO contacts, Size S00, 45 mm wide, IP20 front. Rated 10 A at 24 V. 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":"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","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","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","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 50 Hz rated value":"220 V","at 500 V rated value":"2 A","at 60 Hz rated value":"220 V","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","protection class IP on the front":"IP20","Product Extension Auxiliary Switch":"No","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","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","apparent holding power of magnet coil at AC":"4.6 VA","apparent pick-up power of magnet coil at AC":"27 VA","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":"AC","Inductive Power Factor With Closing Power Of The Coil":"0.8","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","Inductive Power Factor With The Holding Power Of The Coil":"0.27","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=371816&mlfb=3RH1344-1AN20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1344-1AN20/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RH1344-1AN20 and how do I get a price?","answer":"Sourced to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"What is 3RH1344-1AN20's contact configuration?","answer":"Four normally-open instantaneous contacts and zero normally-closed — a straight make-only block."},{"question":"What is the depth of 3RH1344-1AN20?","answer":"The depth is 111 mm, with a width of 45 mm and height of 57.5 mm — Size S00 frame."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1344-1AN20","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/3RH1344-1AN20 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}}