{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-2BF40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-2BF40","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-2BF40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2BF40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 3RH1122-2BF40, 110 VDC coil, 2 NO + 0 NC contacts, 10 A AC-12, screw and snap-on mounting.","salesMarkdown":"## What this auxiliary contactor is rated for Switching capacity drops with voltage: 6 A at 230 V AC, 3 A at 400 V AC, 2 A at 500 V AC, and 1 A at 690 V AC. For DC circuits, it handles 10 A at 24 V, 1 A at 110 V, and 0.27 A at 220 V. These are the contact ratings that govern real-world fit — if your control voltage is 230 V AC, the 6 A limit is the one that matters, not the 10 A AC-12 headline. The magnet coil is rated 110 V DC with a closing and holding power of 3.2 W. That steady-state draw is low enough for most 24 V DC supplies when stepped up through a converter, but the 3.2 W holding power means the coil driver must be rated for continuous DC duty — no AC coil hum, but the DC coil draws constant power as long as it's energised. Mounting is by screw or snap-on to DIN rail. Wire termination accepts 2x (0.25 to 2.5 mm²) solid or stranded — that's two conductors per terminal, useful for daisy-chaining control voltage to multiple auxiliary contacts in the same row without extra junction blocks. ## Environmental limits and approvals Shock resistance is 10g for 5 ms and 5g for 10 ms, adequate for machine-mounted panels on presses or conveyors.","metaTitle":"Siemens 3RH1122-2BF40 SIRIUS Auxiliary Contactor","metaDescription":"Siemens 3RH1122-2BF40 SIRIUS auxiliary contactor, 110 VDC coil, 10 A AC-12 rating, 2 NO + 0 NC contacts, size S00. Current production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"60 mm","Maximum":"2 000 m","At The Side":"0 mm","Rated Value":"110 V","On The Front":"IP20","Initial Value":"0.8","Mounting type":"screw and snap-on mounting","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","Auxiliary switch":"Yes","During Operation":"-25 ... +60 °C","During Transport":"-55 ... +80 °C","Full-scale value":"1.1","Shock resistance":"10g / 5 ms and 5g / 10 ms","Delayed Switching":"0","Lagging Switching":"0","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","Product brand name":"SIRIUS","Degree of pollution":"3","Product designation":"Auxiliary contactor","at 24 V rated value":"10 A","Of Contactor Typical":"30 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.27 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 500 V rated value":"2 A","at 690 V rated value":"1 A","Instantaneous Contact":"2","For Auxiliary Contacts":"0","Make-Before-Break Switching":"0","Closing power of magnet coil at DC":"3.2 W","Holding power of magnet coil at DC":"3.2 W","Operating current at AC-12 maximum":"10 A","Surge voltage resistance rated value":"6 kV","Reference code acc. to DIN EN 81346-2":"K","with low demand rate acc. to SN 31920":"40 %","with high demand rate acc. to SN 31920":"75 %","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","at AWG conductors for auxiliary contacts":"2x (24 ... 14)","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"Cage Clamp terminals","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Of Auxiliary Contacts Instantaneous Contact":"0","Number of NC contacts for auxiliary contacts":"2","Number of NO contacts for auxiliary contacts":"2","with degree of pollution 3 at AC rated value":"690 V","Type of voltage of the control supply voltage":"DC","Identification number and letter for switching elements":"22 E","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","Of The Contactor With Added Electronics-Compatible Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=212845&mlfb=3RH1122-2BF40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2BF40/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-2BF40","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/3RH1122-2BF40 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}}