{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2122-2AN20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2122-2AN20","canonicalUrl":"https://aoctrl.com/siemens/3RH2122-2AN20","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2122-2AN20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, 3RH2122-2AN20, size S00, 2 NO instantaneous contacts, screw and snap-on mounting on 35 mm DIN rail.","salesMarkdown":"The S00 footprint (45 mm wide, 70 mm high, 73 mm deep) is the compact end of the SIRIUS contactor family, sized for control circuits rather than main power switching. Rated for 10 A at both 24 V and 230 V, with a rated insulation voltage of 690 V at 50/60 Hz. The contact rating drops with voltage — 4.7 A at 60 V, 3 A at 110 V and 400 V, 1.2 A at 220 V — so match the load voltage to the right column in the selection table. The 10 A figure at 24 V and 230 V covers most PLC output and relay coil switching duties. ## Mounting and spacing ## Contact performance and electrical life Instantaneous contacts rated for 30,000,000 operating cycles typical. Arcing time 10 to 15 ms at AC, 4 to 15 ms at DC. DC switching frequency 10,000 operations per hour. Relative humidity minimum 10 %. RoHS compliance date of October 1, 2009 is on record.","metaTitle":"Siemens SIRIUS 3RH2122-2AN20 Auxiliary Contactor, 2 NO Conta","metaDescription":"Siemens SIRIUS 3RH2122-2AN20 auxiliary contactor, 2 NO instantaneous contacts, size S00, rated 10 A at 24 V and 230 V. Screw/snap-on 35 mm DIN rail mounting. Current production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Width":"45 mm","at AC":"4 ... 15 ms","at DC":"10 000 1/h","title":"3RH2122-2AN20","Height":"70 mm","Upwards":"10 mm","Forwards":"10 mm","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","description":"Contactor relay, 2 NO + 2 NC, 220 V AC, 50 / 60 Hz, Size S00, Spring-type terminal","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","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","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 ... 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 50 Hz rated value":"220 V","at 500 V rated value":"2 A","at 60 Hz rated value":"220 V","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","Product Extension Auxiliary Switch":"Yes","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 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 ... 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)","apparent holding power of magnet coil at AC":"5.7 VA","apparent pick-up power of magnet coil at AC":"37 VA","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":"AC","contact rating of auxiliary contacts according to UL":"A600 / Q600","Inductive Power Factor With Closing Power Of The Coil":"0.8","Identification Number And Letter For Switching Elements":"22 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.25","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/d563674bdf57f913486eadef36ee9b8d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=377819&mlfb=3RH2122-2AN20"},"ai":{"faq":[{"question":"What is the closest functional alternative — 3RT1016-1AN22?","answer":"The 3RT1016-1AN22 is a power contactor, not an auxiliary contactor. It shares the S00 frame size and DIN-rail mounting, but carries main contacts for motor loads rather than auxiliary contacts for control circuits. They are not drop-in replacements: the 3RH2122-2AN20 serves the signal-level switching role, while the 3RT1016-1AN22 handles power switching. If you need auxiliary contacts on a 3RT power contactor, the 3RH2122-2AN20 mounts alongside it as a separate block."},{"question":"What are the key dimensions for panel layout?","answer":"Width 45 mm, height 70 mm, depth 73 mm. Clearance requirements: 10 mm upward, 10 mm forward, 10 mm downward, 6 mm at the sides."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2122-2AN20","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/3RH2122-2AN20 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}