{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2344-1DW40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2344-1DW40","canonicalUrl":"https://aoctrl.com/siemens/3RH2344-1DW40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2344-1DW40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2344-1DW40 auxiliary contactor, size S00, 4 NO instantaneous contacts, 45 mm width, 117 mm depth, screw and snap-on mounting on 35 mm DIN rail, with varistor surge suppression.","salesMarkdown":"## 4 NO auxiliary switching in a 45 mm S00 frame The 3RH2344-1DW40 is a SIRIUS auxiliary contactor — four normally-open instantaneous contacts in a size S00 housing that fits a 45 mm wide DIN-rail footprint. A built-in varistor clamps the coil suppression, so you do not need an external RC snubber or freewheeling diode on the DC coil side. The magnet coil draws 4 W at DC, which keeps the heat rise low inside a crowded panel. The DC switching capacity is given as a time range of 7–13 ms, which covers the arc extinction window for most control loads. Mechanical endurance is 10 million operations typical; the AC switching frequency is 10,000 cycles per hour. That makes it a fast mover for high-cycle signalling applications like conveyor interlocks or valve position feedback. No direct successor or cross-reference is listed; the 3RH2344-1DW40 is the standard variant with varistor suppression and 4 NO contacts in size S00. For a panel originally built around a different auxiliary contactor, compare the 45 mm width and the 4 NO configuration — if the footprint and contact count match, it drops in without rewiring.","metaTitle":"Siemens 3RH2344-1DW40 SIRIUS auxiliary contactor, 4 NO","metaDescription":"Siemens SIRIUS 3RH2344-1DW40 auxiliary contactor, 4 NO contacts, size S00, 45 mm wide, screw/DIN rail mount. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"117 mm","Width":"45 mm","at AC":"10 000 1/h","at DC":"7 ... 13 ms","title":"3RH2344-1DW40","Height":"57.5 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"48 V","description":"Contactor relay with auxiliary switch 48 V DC Size S00, screw terminal, 4 NC basic unit / EN Varistor plugged on","Initial Value":"0.8","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail","Full-Scale Value":"1.1","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","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"Auxiliary contactor","at 24 V rated value":"10 A","at 60 V rated value":"4.7 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"3 A","at 220 V rated value":"1.2 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 440 V rated value":"0.5 A","at 500 V rated value":"2 A","at 600 V rated value":"0.26 A","at 690 V rated value":"1 A","Instantaneous Contact":"4","Relative Humidity Minimum":"10 %","Substance Prohibitance (Date)":"07/01/2006","Design Of The Surge Suppressor":"with varistor","Product Extension Auxiliary Switch":"No","closing power of magnet coil at DC":"4 W","holding power of magnet coil at DC":"4 W","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","operating frequency at DC-12 maximum":"1 000 1/h","operating frequency at DC-13 maximum":"1 000 1/h","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)","with low demand rate according to SN 31920":"40 %","with high demand rate according to SN 31920":"73 %","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","contact rating of auxiliary contacts according to UL":"A600 / Q600","Identification Number And Letter For Switching Elements":"44 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","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","design of the miniature circuit breaker for short-circuit protection of the auxiliary circuit up to 230 V":"C characteristic: 6 A; 0.4 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b0f7f26c9f2ed2830e6c3b8c9022717b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=319261&mlfb=3RH2344-1DW40"},"ai":{"faq":[{"question":"How can I get current pricing and availability for 3RH2344-1DW40?","answer":"Submit an RFQ through the storefront; we source it from authorized distribution and provide a firm price and lead time on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2344-1DW40","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/3RH2344-1DW40 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}