{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2344-1DB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2344-1DB40","canonicalUrl":"https://aoctrl.com/siemens/3RH2344-1DB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2344-1DB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 4 NO instantaneous contacts, 24 VDC coil with varistor, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"Coil pulls 24 VDC at 4 W closing power, and the contacts are rated 10 A at 24 V for DC switching — that's the number to size your control circuit by, not the AC ratings. Built-in varistor surge suppression means you don't need to add a separate snubber across the coil; the suppressor is designed in. The S00 footprint — 45 mm wide, 57.5 mm tall, 117 mm deep — fits alongside a contactor of the same frame size, sharing the rail without crowding adjacent devices. ## Clearance and mounting position Minimum clearances around the contactor: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side. That's the air gap needed for arc extinguishing and heat dissipation — don't crowd it tighter in a dense panel. Mounting position is flexible: ±180° rotation on a vertical surface, and you can tilt it forward or backward by ±22.5° on that same vertical surface. Rated for operation from -25 to +60 °C, storage from -55 to +80 °C.","metaTitle":"Siemens 3RH2344-1DB40 SIRIUS Auxiliary Contactor, 4 NO, 24 V","metaDescription":"Siemens SIRIUS 3RH2344-1DB40 auxiliary contactor, size S00, 4 NO contacts, 24 VDC coil, 10 A rated current. Screw and snap-on 35 mm DIN rail mounting. Sourced to order, quote on re","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","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":"24 V","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 DIN 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","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","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 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)","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,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/64cafceaad73af6b218f947486a8482f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=479078&mlfb=3RH2344-1DB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2344-1DB40/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RH2344-1DB40?","answer":"The depth is 117 mm, with a width of 45 mm and height of 57.5 mm. This is the S00 frame size, standard for Siemens auxiliary contactors in this class."},{"question":"Will 3RH2344-1DB40 drop into a panel specified for 3RH2140-1BP40?","answer":"Both are S00-frame auxiliary contactors with the same DIN-rail mounting and similar dimensions. The 3RH2344-1DB40 carries 4 NO contacts; the 3RH2140-1BP40 may have a different contact configuration. Verify the contact arrangement matches your circuit before swapping, but the mechanical fit and rail footprint are identical."},{"question":"What compliance documentation does Siemens provide for 3RH2344-1DB40?","answer":"The part carries RoHS compliance dated July 1, 2006, and the SIRIUS series typically holds CE, UL, CSA, and IEC certifications. Full declarations and certificates are available through the Siemens Industry Online Support portal."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2344-1DB40","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/3RH2344-1DB40 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}}