{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-1BM40-0AA6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-1BM40-0AA6","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-1BM40-0AA6","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1BM40-0AA6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, Size S00, 3RH1122-1BM40-0AA6, 2 NO + 2 NC contacts, 10 A rated, screw and snap-on mounting, 45 x 57.5 x 72 mm.","salesMarkdown":"The Siemens 3RH1122-1BM40-0AA6 is a SIRIUS auxiliary contactor in the Size S00 frame — a compact, 45 mm wide switching block meant to mirror or extend the auxiliary contact set of a main contactor or starter. It carries 2 normally-open and 2 normally-closed instantaneous contacts, rated for 10 A in AC-12 duty, which is the resistive / low-inductive load curve typical of PLC inputs, signal lamps, and small relay coils. The screw and snap-on mounting means it clips directly onto a DIN rail alongside the main power contactor without additional hardware. ## Mechanical Endurance and Shock — The Reliability Angle Mechanical endurance is listed at 30 million operating cycles — typical for a contactor of this class, meaning it outlasts the main contactor it's paired with in most cyclic applications like conveyor or pump control. Shock resistance of 10g / 5 ms and 5g / 10 ms means it holds contact closure under moderate vibration environments; it's not a mil-spec part, but it's adequate for industrial machinery bolted to a concrete floor. ## Terminal Capacity and Wiring Reality The screw terminals accept 2x (0.5... 1.5 mm²), 2x (0.75... 2.5 mm²), or 2x 4 mm² solid conductor — so you can land two smaller wires per terminal for daisy-chaining or parallel feeds. That's a practical detail for the wireman: it avoids needing a separate terminal block for distributing the control supply to multiple auxiliary contactors. The closing and holding power of the magnet coil at DC is 3.2 W — a low enough draw that a 24 VDC power supply can drive several of these without derating the supply's output.","metaTitle":"Siemens 3RH1122-1BM40-0AA6 SIRIUS Auxiliary Contactor, Size","metaDescription":"Siemens SIRIUS auxiliary contactor 3RH1122-1BM40-0AA6, Size S00, 2 NO + 2 NC, 10 A rated, screw/snap-on mount. Current lifecycle status. Sourced to order.","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","Maximum":"2 000 m","At The Side":"0 mm","Rated Value":"220 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 Degree Of Pollution 3 Rated Value":"690 V","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)","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"screw-type terminals","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","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=536505&mlfb=3RH1122-1BM40-0AA6","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1BM40-0AA6/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this auxiliary contactor?","answer":"It has 2 NO + 2 NC instantaneous contacts rated 10 A at AC-12 (resistive load). Coil holding power is 3.2 W DC. Surge voltage withstand is 6 kV. Operating temperature range is -25 to +60 °C."},{"question":"What conductor sizes does the terminal accept?","answer":"The screw terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm² solid conductor per terminal."},{"question":"What is the mechanical endurance rating?","answer":"30 million operating cycles mechanical endurance, with shock resistance of 10g / 5 ms and 5g / 10 ms."},{"question":"What is the mounting method and dimensions?","answer":"Screw and snap-on mounting to DIN rail. Dimensions are 45 mm width, 57.5 mm height, 72 mm depth. It fits the Size S00 contactor footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-1BM40-0AA6","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/3RH1122-1BM40-0AA6 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}}