{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2122-2BG40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2122-2BG40","canonicalUrl":"https://aoctrl.com/siemens/3RH2122-2BG40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2122-2BG40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 2 NO instantaneous contacts, screw and snap-on mounting on 35 mm DIN rail, 73 mm depth, 45 mm width.","salesMarkdown":"## Switching capacity and contact duty The two NO contacts are rated for 10 A at 24 V AC and 230 V AC, 4.7 A at 60 V AC, 3 A at 110 V AC and 400 V AC, 1.2 A at 220 V AC, and 0.5 A at 440 V AC. At 690 V AC the rating is 1 A. These values define the resistive load curve; for inductive or DC loads, derate per the manufacturer's application guidelines. The contactor switches at up to 10,000 operations per hour, with an arcing time of 10 to 15 ms and a DC switching duration of 7 to 13 ms. The 73 mm depth and 70 mm height fit within the S00 envelope, leaving room for adjacent devices on the same rail. ## Coil and environmental ratings The DC magnet coil draws 4 W closing power and 4 W holding power. The device is rated for degree of pollution 3 and relative humidity minimum 10 %. Substance prohibitance date is 10/01/2009, indicating RoHS compliance from that date.","metaTitle":"Siemens SIRIUS 3RH2122-2BG40 Auxiliary Contactor, Size S00,","metaDescription":"Siemens SIRIUS 3RH2122-2BG40 auxiliary contactor, size S00, 2 NO contacts. Rated for 10 A at 230 V AC. Screw and snap-on mounting on 35 mm DIN rail. Current lifecycle stage. Source","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":"7 ... 13 ms","title":"3RH2122-2BG40","Height":"70 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"125 V","description":"Contactor relay, 2 NO + 2 NC, 125 V DC, Size S00, Spring-type terminal","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":"+/-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 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","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","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)","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":"$24.13","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/04d55a6ccf136ba294f08786aa8ba938.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=228929&mlfb=3RH2122-2BG40"},"ai":{"faq":[{"question":"Where can I buy 3RH2122-2BG40 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ to receive current pricing and availability confirmation."},{"question":"What is 3RH2122-2BG40's listed depth and width?","answer":"The depth is 73 mm and the width is 45 mm, fitting the S00 frame size."},{"question":"What compliance documentation is available for 3RH2122-2BG40?","answer":"The substance prohibitance date of 10/01/2009 indicates RoHS compliance from that date. The product is part of the Siemens SIRIUS series, which typically provides IEC, UL, and CSA certifications; specific documentation is available upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2122-2BG40","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/3RH2122-2BG40 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}}