{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1422-1HF40-0LA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1422-1HF40-0LA0","canonicalUrl":"https://aoctrl.com/siemens/3RH1422-1HF40-0LA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1422-1HF40-0LA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 3RH1422-1HF40-0LA0, 110 V DC coil, 2 NO + 2 NC contacts, screw and snap-on mounting, IP20 front protection.","salesMarkdown":"## Siemens SIRIUS 3RH1422-1HF40-0LA0 — Auxiliary Contactor, Size S00, 110 V DC Coil It carries a 110 V DC coil and provides 2 normally-open plus 2 normally-closed instantaneous contacts, giving you four isolated poles for signal routing or interlock logic. Rated switching capacity varies with the load voltage: 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 — these are the thermal current ratings per IEC/EN 60947, so the contactor can handle those currents in AC-15 or DC-13 duty within the respective voltage class. The 110 V DC coil draws 11 W on pick-up and holds at 4 W, which keeps the control transformer load predictable. The size S00 footprint is 90 mm wide, 57.5 mm tall, and 72 mm deep — compact enough for dense terminal-block rows. Wire capacity on the auxiliary contacts accepts solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm², plus the AWG equivalents. Front-side protection is IP20, so the contactor is finger-safe once installed behind a panel door. Shock resistance is specified at 10g / 5 ms and 5g / 10 ms, which covers most industrial vibration profiles from conveyors and compressors. RoHS compliance date is July 1, 2006, so the contactor meets the original RoHS directive.","metaTitle":"Siemens SIRIUS 3RH1422-1HF40-0LA0 Auxiliary Contactor, 110 V","metaDescription":"Siemens SIRIUS 3RH1422-1HF40-0LA0 auxiliary contactor, size S00, 110 V DC coil, 2 NO + 2 NC contacts. Rated switching capacity 10 A at 24 V, 6 A at 230 V. Active production, source","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"72 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Width":"90 mm","Height":"57.5 mm","Rated Value":"110 V","Initial Value":"0.7","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-40 ... +70 °C","During Transport":"-55 ... +80 °C","Fastening Method":"screw and snap-on mounting","Full-Scale Value":"1.25","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":"5 000 000","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":"2","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":"Yes","closing power of magnet coil at DC":"11 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), 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":"1","number of NO contacts for auxiliary contacts":"2","Type Of Voltage Of The Control Supply Voltage":"DC","Identification Number And Letter For Switching Elements":"21 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Required Spacing With Side-By-Side Mounting At The Side":"0 mm","Of The Contactor With Added Auxiliary Switch Block Typical":"5 000 000","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","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000","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=343871&mlfb=3RH1422-1HF40-0LA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1422-1HF40-0LA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RH1422-1HF40-0LA0 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote (RFQ) to confirm availability and current pricing — no stock count or price figure is published here."},{"question":"What are the key ratings for 3RH1422-1HF40-0LA0?","answer":"The contactor has a 110 V DC coil, 2 NO + 2 NC instantaneous contacts, and switching capacity of 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 endurance is 5 million cycles typical."},{"question":"What is the closest functional second-source to 3RH1422-1HF40-0LA0?","answer":"The closest peer within the same SIRIUS family is the 3RH2122-1BW40, which shares the size S00 footprint and 2 NO + 2 NC contact arrangement but uses a different coil voltage. Verify coil compatibility before substituting — the 3RH1422-1HF40-0LA0 is a 110 V DC coil variant, while the 3RH2122-1BW40 may differ. The mounting and wiring dimensions are identical, so it drops into the same DIN-rail position without rewiring."},{"question":"Will 3RH1422-1HF40-0LA0 drop into a panel specified around 3RH2122-1BW40 without rewiring?","answer":"Yes, the physical footprint is identical — both are size S00 with the same 90 mm width, 57.5 mm height, and 72 mm depth, and both use screw/snap-on DIN-rail mounting. The terminal layout and wire capacity are the same. The only difference is the coil voltage; the 3RH1422-1HF40-0LA0 requires 110 V DC, so verify the control circuit voltage before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1422-1HF40-0LA0","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/3RH1422-1HF40-0LA0 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}}