{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-1BF40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-1BF40","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-1BF40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1BF40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH1122-1BF40 auxiliary contactor, S00 size, 110 V DC coil, 2 NO instantaneous contacts, 45 mm wide, screw and snap-on DIN-rail mounting.","salesMarkdown":"It's built in the S00 size frame, the smallest in the SIRIUS family, and carries a 110 V DC coil. The 3RH1122-1BF40 provides two normally-open (NO) instantaneous contacts, meaning they close the instant the coil is energized with no intentional delay. The coil draws 3.2 W both at pickup and holding, so the power supply doesn't need to handle an inrush spike — useful when sizing a 24 V or 110 V DC bus for a panel full of contactors. At 45 mm wide and 72 mm deep, it leaves room alongside a main contactor in a standard 60 mm deep enclosure. Terminals accept solid conductors: 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², or 2x 4 mm². That covers most control wiring from signal loops to short motor-circuit leads. The contacts are rated for switching at various voltages: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V. At the coil voltage of 110 V DC, the rated switching current is 1 A — that's the figure to check when switching a DC load like a small solenoid or indicator lamp. Shock resistance is rated at 10g for 5 ms and 5g for 10 ms, which covers most industrial vibration environments like conveyor lines or pump skids.","metaTitle":"Siemens SIRIUS 3RH1122-1BF40 Auxiliary Contactor, 110 V DC,","metaDescription":"Siemens SIRIUS 3RH1122-1BF40 auxiliary contactor, 110 V DC coil, S00 size, 2 NO contacts, 45 mm wide, current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"72 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Width":"45 mm","Height":"57.5 mm","Rated Value":"110 V","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-55 ... +80 °C","Fastening Method":"screw and snap-on mounting","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","Contact Reliability":"one incorrect switching operation of 100 million switching operations (17 V, 1 mA)","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","Substance Prohibitance (Date)":"01.07.2006 00:00:00","protection class IP on the front":"IP20","Product Extension Auxiliary Switch":"Yes","closing power of magnet coil at DC":"3.2 W","holding power of magnet coil at DC":"3.2 W","reference code acc. to IEC 81346-2":"K","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Touch Protection Against Electrical Shock":"finger-safe","Of Auxiliary Contacts Instantaneous Contact":"0","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","B10 value with high demand rate acc. to SN 31920":"1 000 000; With 0.3 x Ie","Identification Number And Letter For Switching Elements":"22 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Required Spacing With Side-By-Side Mounting At The Side":"0 mm","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","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","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"}},"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=456299&mlfb=3RH1122-1BF40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1BF40/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings I need to check for fit?","answer":"The coil is 110 V DC, drawing 3.2 W. The contacts are 2 NO, rated 10 A at 24 V, 6 A at 230 V, and 1 A at 690 V. At 110 V DC, the switching rating is 1 A. The frame size is S00, 45 mm wide."},{"question":"What compliance documentation is available?","answer":"The part carries a substance prohibition date of July 1, 2006, indicating RoHS compliance. It is designed to IEC standards (reference code K per IEC 81346-2). Specific UL, CSA, or CE marks are not listed in the core specs, but as a current-production Siemens SIRIUS component, it typically carries these approvals — verify with the datasheet for your jurisdiction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-1BF40","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/3RH1122-1BF40 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}}