{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-2BW40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-2BW40","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-2BW40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2BW40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 48 VDC coil, 10 A AC-12 rated, 2 NO + 2 NC contacts, screw and snap-on mounting, IP20 front protection.","salesMarkdown":"It carries a 48 VDC coil and is rated for 10 A in AC-12 duty, which covers resistive and solid-state loads typically found in PLC output circuits and relay logic panels. The contact arrangement is 2 normally-open and 2 normally-closed instantaneous contacts, giving you four isolated poles for feedback, interlock, or permissive signals. Side clearance is zero — adjacent devices can butt up. The IP20 front protection means it's suited for enclosed panels where tools are the only access; no washdown rating. ## Switching capacity across voltages The AC-12 rating at 10 A is the headline figure, but the contactor also carries defined switching capacities at other voltages: 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. For DC control circuits, it switches 10 A at 24 V, 1 A at 110 V, and 0.27 A at 220 V. These values define the load-break capability per pole — useful when interposing between 24 VDC PLC outputs and higher-voltage contactor coils. Shock rated at 10g for 5 ms and 5g for 10 ms. Mechanical life is typical 30 million operations. ## Coil and operating range Operating range is 0.8 to 1.1 times rated voltage, so pickup is guaranteed at 38.4 V and the coil withstands 52.8 V continuous.","metaTitle":"Siemens 3RH1122-2BW40 SIRIUS Auxiliary Contactor, 48 VDC, 10","metaDescription":"Siemens 3RH1122-2BW40 SIRIUS auxiliary contactor, size S00. 48 VDC coil, 10 A AC-12 rated. 2 NO + 2 NC contacts. Screw/snap-on mount, IP20. Current-production part, sourced to orde","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":"48 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 61346-2":"K","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=144404&mlfb=3RH1122-2BW40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2BW40/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between 3RH1122-2BW40 and 3RH2122-1BW40?","answer":"The 3RH2122-1BW40 is a physically larger size S2 auxiliary contactor (wider footprint) with a different coil voltage. The 3RH1122-2BW40 is size S00 (45 mm wide) with a 48 VDC coil. They are not drop-in interchangeable — the S2 unit requires more DIN rail space and a different coil supply."},{"question":"Where can I buy 3RH1122-2BW40 and get current pricing?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for quote to confirm current availability and pricing at the time of your order."},{"question":"What is the contact configuration of 3RH1122-2BW40?","answer":"It has 2 normally-open instantaneous contacts and 2 normally-closed instantaneous contacts, for a total of four isolated poles. There are no leading, lagging, delayed, or make-before-break contacts on this variant."},{"question":"What compliance documentation is available for 3RH1122-2BW40?","answer":"As a Siemens SIRIUS product, this auxiliary contactor is designed to meet IEC/EN 60947-5-1 standards. Specific compliance documentation (RoHS, REACH, UL, CSA) should be requested at quote time to confirm current declarations for your jurisdiction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-2BW40","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/3RH1122-2BW40 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}}