{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2122-2BB40-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2122-2BB40-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RH2122-2BB40-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2122-2BB40-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2122-2BB40-ZX95 auxiliary contactor, size S00, 24 V DC coil, 2 instantaneous NO contacts, screw and snap-on 35 mm DIN rail mounting, 45 mm width.","salesMarkdown":"## DIN-rail fit and panel clearances The 3RH2122-2BB40-ZX95 is a size S00 auxiliary contactor from the Siemens SIRIUS family, measuring 45 mm wide by 73 mm deep by 70 mm high. Clearances are tight but workable: 10 mm needed above, below, and in front of the contactor, 6 mm to the side. On a vertical mounting surface you can rotate the contactor ±180° and tilt it ±22.5° forward or back — handy when you're routing wires around a crowded gland plate. That's enough for daisy-chaining control wiring without a separate terminal block. ## Switching capability and coil draw This is an auxiliary contactor — it handles signal-level switching in control circuits, not motor power. Switching frequency is 10,000 operations per hour on AC loads, with arcing time between 10 and 15 ms. ## Environmental tolerance and compliance Rated for pollution degree 3, meaning it's built for the conductive dust and humidity you find in industrial enclosures — not just clean office environments. RoHS compliance is dated to October 2009 (substance prohibition date), and the minimum relative humidity rating is 10%. The auxiliary switch extension option (product extension auxiliary switch = yes) lets you add contacts without a separate relay.","metaTitle":"Siemens 3RH2122-2BB40-ZX95 SIRIUS Auxiliary Contactor","metaDescription":"Siemens 3RH2122-2BB40-ZX95 SIRIUS auxiliary contactor, size S00, 24 V DC coil, 2 NO contacts, 45 mm wide. Active 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":"7 ... 13 ms","title":"3RH2122-2BB40-ZX95","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, Size S00, Spring-type terminal Reusable packaging = 120 units","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 standard mounting 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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7cd976369627344c90e6083d7e6d3d20.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=202967&mlfb=3RH2122-2BB40-ZX95"},"ai":{"faq":[{"question":"What are the key ratings for 3RH2122-2BB40-ZX95?","answer":"Size S00 auxiliary contactor, 45 mm wide, 24 V DC coil drawing 4 W. Screw and snap-on 35 mm DIN rail mounting, pollution degree 3, operating temperature -25 to +60 °C."},{"question":"Can 3RH2122-2BB40-ZX95 replace a 6ED1052-1MD08-0BA1 in an existing panel?","answer":"No — the 6ED1052-1MD08-0BA1 is a Siemens LOGO! PLC module, not an auxiliary contactor. They serve completely different functions in the panel: one is a logic controller, the other is a signal-switching contactor. No direct functional substitution exists between them."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2122-2BB40-ZX95","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/3RH2122-2BB40-ZX95 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}}