{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2122-1VB40-ZW96","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2122-1VB40-ZW96","canonicalUrl":"https://aoctrl.com/siemens/3RH2122-1VB40-ZW96","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2122-1VB40-ZW96","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2122-1VB40-ZW96, coupling relay for switching auxiliary circuits, 24 VDC coil, 2 instantaneous NO contacts, 10 A rated, diode surge suppression, S00 size, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"## Coupling relay for auxiliary circuits The Siemens SIRIUS 3RH2122-1VB40-ZW96 is a coupling relay designed to switch auxiliary circuits in control panels. It carries 2 instantaneous NO contacts rated at 10 A at 24 V, with a 24 VDC coil that draws 1.6 W closing power. The built-in diode surge suppressor handles the inductive kick from the coil, so you don't need to add an external flyback diode across the coil terminals. These spacings keep arc flash from the 10–15 ms arcing time from tracking to neighboring gear. The screw terminals accept 2 x 0.5 to 1.5 mm² solid or stranded, 2 x 0.75 to 2.5 mm², or 2 x 4 mm². Strip length follows standard practice for the terminal type; the spring-cage variant is not offered on this order code.","metaTitle":"Siemens 3RH2122-1VB40-ZW96 SIRIUS Coupling Relay, 24 VDC, 10","metaDescription":"Siemens SIRIUS 3RH2122-1VB40-ZW96 coupling relay, 24 VDC coil, 10 A rated, 2 NO contacts, diode suppression, S00 size, snap-on DIN rail. Current production. Quoted to order.","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":"20 ... 80 ms","Height":"57.5 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"24 V","Initial Value":"0.85","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +50 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail","Full-Scale Value":"1.85","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 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"Coupling relay for switching auxiliary circuits","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":"No","closing power of magnet coil at DC":"1.6 W","holding power of magnet coil at DC":"1.6 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 ... 16), 2x (18 ... 14), 2x 12","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)","with low demand rate according to SN 31920":"40 %","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","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","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,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3145a264569c4bfd38df3d15f46ce287.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=774116&mlfb=3RH2122-1VB40-ZW96","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2122-1VB40-ZW96/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this coupling relay?","answer":"It has a 24 VDC coil, 2 instantaneous NO contacts rated at 10 A at 24 V, and a built-in diode surge suppressor. The S00 size fits a 45 mm wide DIN-rail footprint."},{"question":"Where can I buy 3RH2122-1VB40-ZW96?","answer":"This part is sourced to order through independent distribution. Submit an RFQ for current pricing and availability; lead time is confirmed at quote time."},{"question":"Will 3RH2122-1VB40-ZW96 drop into a panel specified around 3RH2122-1WB40 without rewiring?","answer":"Both are SIRIUS S00-size coupling relays with the same 45 mm width and DIN-rail mounting. The 1VB40 has a 24 VDC coil and diode suppression; the 1WB40 uses a different coil voltage. If the coil voltage matches your circuit, the mechanical fit is identical — no rewiring of the base required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2122-1VB40-ZW96","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/3RH2122-1VB40-ZW96 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}}