{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2122-2FB40-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2122-2FB40-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RH2122-2FB40-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2122-2FB40-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2122-2FB40-1AA0 auxiliary contactor, size S00, 24 VDC coil with integrated diode surge suppression, 2 NO contacts, screw and snap-on mounting on 35 mm DIN rail.","salesMarkdown":"## Auxiliary contactor for control-circuit switching The Siemens 3RH2122-2FB40-1AA0 is a SIRIUS auxiliary contactor in frame size S00, designed for switching control circuits rather than main motor loads. It carries 2 normally open instantaneous contacts, making it suitable for interlocking, signalling, or extending the auxiliary contact count on a larger contactor or starter assembly. The coil is rated 24 VDC and includes an integrated diode as the surge suppressor, which clips the inductive kickback when the coil de-energises — critical for protecting the PLC output or relay that drives it. Closing power of the magnet coil is 4 W at DC. The contact ratings vary significantly with the switched voltage and current type. The contactor measures 45 mm wide, 70 mm high, and 73 mm deep. Relative humidity minimum is 10 %. The substance prohibitance date is 10/01/2009, indicating RoHS compliance. Available to order against RFQ through independent distribution channels. Pricing and lead time confirmed at quote time based on the BOM quantity. The part carries the full Siemens compliance documentation package (RoHS, REACH, CE, UL, IEC) as standard for the SIRIUS series.","metaTitle":"Siemens 3RH2122-2FB40-1AA0 SIRIUS Auxiliary Contactor","metaDescription":"Siemens 3RH2122-2FB40-1AA0 SIRIUS auxiliary contactor, size S00, 24 VDC coil with diode suppression, 2 NO contacts. Current production; sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Width":"45 mm","at AC":"10 000 1/h","at DC":"38 ... 65 ms","title":"3RH2122-2FB40-1AA0","Height":"70 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"24 V","description":"Contactor relay, 2 NO + 2 NC, 24 V DC, with integrated diode, Size S00, Spring-type terminal upright mounting position","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":"standing, on horizontal mounting surface","Size Of Contactor":"S00","Solid Or Stranded":"2x (0,5 ... 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":"30 000 000","at 110 V rated value":"3 A","at 220 V rated value":"1.2 A","at 230 V rated value":"10 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":"2","Relative Humidity Minimum":"10 %","Substance Prohibitance (Date)":"10/01/2009","Design Of The Surge Suppressor":"diode","Product Extension Auxiliary Switch":"Yes","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 ... 12)","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"2x (0.5 ... 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 %","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","with high demand rate according to SN 31920":"73 %","number of NC contacts for auxiliary contacts":"2","number of NO contacts for auxiliary contacts":"2","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":"22 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","Type Of Electrical Connection For Auxiliary And Control Circuit":"spring-loaded 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","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/a7eac6e09dabb214e09fa40faac0b198.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=646422&mlfb=3RH2122-2FB40-1AA0"},"ai":{"faq":[{"question":"How do I get pricing and availability for 3RH2122-2FB40-1AA0?","answer":"Submit an RFQ for this part. Pricing and current availability are confirmed at quote time based on your BOM quantity, sourced through independent distribution channels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2122-2FB40-1AA0","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/3RH2122-2FB40-1AA0 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}}