{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2344-1DE40-0KA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2344-1DE40-0KA0","canonicalUrl":"https://aoctrl.com/siemens/3RH2344-1DE40-0KA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2344-1DE40-0KA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2344-1DE40-0KA0 auxiliary contactor, 4 NO instantaneous contacts, 24 VDC coil with varistor suppression, S00 frame, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"The Siemens 3RH2344-1DE40-0KA0 is a SIRIUS auxiliary contactor in the S00 frame size, delivering four normally-open instantaneous contacts switched by a 24 VDC coil. The built-in varistor surge suppressor handles the coil's 4 W closing power at DC, so no external suppression diode is needed — one less component to track in the BOM. Each NO contact is rated for 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V. At 60 V the rating is 4.7 A; at 110 V it drops to 3 A; at 220 V it is 1.2 A. For higher voltages: 0.5 A at 440 V, 2 A at 500 V, 0.26 A at 600 V, and 1 A at 690 V. The arcing time spans 10 to 15 ms, with a mechanical life of 10 million operations typical and a maximum switching frequency of 10,000 operations per hour at AC. These ratings cover control-circuit isolation and signal switching across most industrial voltage levels — 24 VDC pilot devices, 120 VAC relay coils, and 400 VAC contactor coils all fall within the contact's capability. The S00 frame (57.5 mm high, 45 mm wide, 117 mm deep) leaves clearance requirements: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side. Terminal capacity accepts 2 × (0.5 to 1.5 mm²), 2 × (0.75 to 2.5 mm²), or 2 × 4 mm² solid or stranded wire — sized for standard control-circuit terminations without special ferrules.","metaTitle":"Siemens 3RH2344-1DE40-0KA0 SIRIUS Auxiliary Contactor, 4 NO,","metaDescription":"Siemens SIRIUS 3RH2344-1DE40-0KA0 auxiliary contactor, 4 NO contacts, 24 VDC coil, screw/snap-on 35 mm DIN rail mount, S00 frame. Sourced to order against RFQ.","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":"60 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 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,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=408658&mlfb=3RH2344-1DE40-0KA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2344-1DE40-0KA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RH2344-1DE40-0KA0 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 a firm price and lead time."},{"question":"Will 3RH2344-1DE40-0KA0 drop into a panel specified around 3RH2140-1BP40?","answer":"Both are S00 frame auxiliary contactors with the same 45 mm width, 57.5 mm height, and 117 mm depth, plus identical clearance requirements (10 mm up/down/forward, 6 mm side). The mounting rail and terminal wire ranges match. The key difference is contact configuration: 3RH2344-1DE40-0KA0 carries 4 NO contacts, while the 3RH2140-1BP40 typically has a different contact arrangement — check your schematic for NO/NC count before swapping."},{"question":"What compliance documentation does Siemens provide for 3RH2344-1DE40-0KA0?","answer":"The part carries a RoHS substance prohibition date of 07/01/2006 and is designed to pollution degree 3 per IEC 60947-1. Siemens typically provides a CE declaration of conformity and UL/CSA file listings for the SIRIUS series — request specific certificates with your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2344-1DE40-0KA0","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/3RH2344-1DE40-0KA0 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}}