{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1131-2BB40-0TK0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1131-2BB40-0TK0","canonicalUrl":"https://aoctrl.com/siemens/3RH1131-2BB40-0TK0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1131-2BB40-0TK0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 24 V DC coil, 3 NO + 1 NC, screw/snap-on mounting, IP20 front, 10 A AC-12 rated.","salesMarkdown":"The Siemens 3RH1131-2BB40-0TK0 is a SIRIUS auxiliary contactor in the S00 frame size, carrying a 24 V DC coil that draws 3.2 W during both closing and holding — no economizer circuit needed, so the coil dissipation stays constant regardless of how long it's energized. That fixed 3.2 W load matters when you're sizing a 24 V DC control transformer or a SELV power supply for a panel with a dozen such contactors; the thermal budget adds up linearly. Rated for 10 A in AC-12 duty (resistive loads at 24 V), the contact set also carries defined currents at higher voltages: 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. These are not derating curves you interpolate — each is a tested rating for that specific voltage. For a 400 V control circuit common in European motor control centers, the 3 A figure governs; don't assume the 10 A AC-12 rating holds at 400 V. Dimensions are 45 mm wide, 60 mm high, and 73 mm deep. The width is the critical panel-pitch dimension: at 45 mm, it occupies one standard 45 mm module position on a DIN rail, matching the pitch of many miniature circuit breakers and terminal blocks in the same enclosure. Terminals accept solid conductors of 2x 0.25 to 2.5 mm² — two conductors per clamp, which is useful for daisy-chaining the control supply through multiple contactors without additional junction points. Shock resistance is 10g for 5 ms and 5g for 10 ms, adequate for most industrial machinery but not for continuous high-vibration environments like a crusher or mill without additional damping. RoHS compliance dated to July 1, 2006, covering the original EU RoHS directive. Contact reliability is specified as one incorrect switching operation per 100 million cycles at 17 V and 1 mA — a dry-circuit rating that matters when switching low-level signals from PLC inputs or sensors, where oxide films on silver contacts can cause intermittent opens.","metaTitle":"Siemens 3RH1131-2BB40-0TK0 SIRIUS Auxiliary Contactor, 24 V","metaDescription":"Siemens SIRIUS 3RH1131-2BB40-0TK0 auxiliary contactor, 24 V DC coil, 10 A AC-12, S00 size, IP20, current lifecycle stage, 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","Rated Value":"24 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":"3","For Auxiliary Contacts":"0","Make-Before-Break Switching":"0","Substance Prohibitance (Date)":"07/01/2006","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","Surge Voltage Resistance Rated Value":"6 kV","operational current at AC-12 maximum":"10 A","for AWG cables for auxiliary contacts":"2x (24 ... 14)","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Touch Protection Against Electrical Shock":"finger-safe","with low demand rate according to SN 31920":"40 %","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Of Auxiliary Contacts Instantaneous Contact":"0","with high demand rate according to SN 31920":"75 %","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"3","Type Of Voltage Of The Control Supply Voltage":"DC","Identification Number And Letter For Switching Elements":"31 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":"Cage Clamp 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=520914&mlfb=3RH1131-2BB40-0TK0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1131-2BB40-0TK0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to 3RH1131-2BB40-0TK0?","answer":"The 3RH2122-1BA40 is a peer auxiliary contactor in the same SIRIUS family, but it carries a different contact configuration and coil voltage — verify the NO/NC count and coil rating before substituting, as the footprint and mounting are shared but the electrical ratings differ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1131-2BB40-0TK0","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/3RH1131-2BB40-0TK0 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}}