{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1344-1DF40-0KA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1344-1DF40-0KA0","canonicalUrl":"https://aoctrl.com/siemens/3RH1344-1DF40-0KA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1344-1DF40-0KA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 3RH1344-1DF40-0KA0, 110 V DC coil, 4 NO instantaneous contacts, 10 A at 24 V, IP20 front, screw and snap-on mounting.","salesMarkdown":"## Siemens 3RH1344-1DF40-0KA0 — SIRIUS Auxiliary Contactor, 110 V DC Coil, 4 NO It carries 4 instantaneous normally-open contacts rated at 10 A at 24 V, 6 A at 230 V, and 1 A at 690 V — so it handles 24 VDC PLC outputs and 230 VAC pilot duty on the same block. The 110 V DC coil draws 3.2 W closing and holding, with pickup at 0.8x rated and dropout at 1.1x rated. ## Contact Ratings and Duty The four NO contacts are rated for inductive and resistive loads across common control voltages: 10 A at 24 V (DC-13 typical for solenoid valves and contactor coils), 6 A at 230 V (AC-15 pilot duty), 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. Shock resistance is 10g for 5 ms and 5g for 10 ms. The varistor surge suppressor is built in across the coil, rated for 6 kV surge voltage — no external suppression needed for most 110 V DC circuits.","metaTitle":"Siemens 3RH1344-1DF40-0KA0 SIRIUS Auxiliary Contactor, 110 V","metaDescription":"Siemens SIRIUS 3RH1344-1DF40-0KA0 auxiliary contactor, size S00, 110 V DC coil, 4 instantaneous NO contacts, 10 A at 24 V. IP20 front, screw/snap-on mounting, -25 to +60 °C operati","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":"110 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","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","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=348550&mlfb=3RH1344-1DF40-0KA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1344-1DF40-0KA0/alternatives.json"},"ai":{"faq":[{"question":"What are the key contact ratings for 3RH1344-1DF40-0KA0?","answer":"The four NO contacts are rated 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. Mechanical life is 10 million operations."},{"question":"What wire sizes does the 3RH1344-1DF40-0KA0 terminal accept?","answer":"The screw terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and 2x 4 mm² solid or stranded conductors."},{"question":"What is the coil voltage and power draw for 3RH1344-1DF40-0KA0?","answer":"The coil is rated 110 V DC, draws 3.2 W both closing and holding. Pickup occurs at 0.8x rated (88 V), dropout at 1.1x rated (121 V). A built-in varistor suppresses surge voltage up to 6 kV."},{"question":"Where can I buy 3RH1344-1DF40-0KA0 and how is it quoted?","answer":"This part is sourced to order through independent distribution. Submit an RFQ for volume pricing and current availability; lead time and stock are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1344-1DF40-0KA0","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/3RH1344-1DF40-0KA0 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}}