{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1131-1BA40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1131-1BA40","canonicalUrl":"https://aoctrl.com/siemens/3RH1131-1BA40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1131-1BA40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH1131-1BA40 auxiliary contactor, size S00, 3 NO instantaneous contacts, 10 A AC-12 rated, screw and snap-on mounting, IP20 front.","salesMarkdown":"It carries 3 normally-open instantaneous contacts rated 10 A at AC-12 (resistive loads up to 400 V), which is the current it can make and break reliably in control circuits like PLC outputs, relay coils, or indicator lamps. Size S00 frame — 45 mm wide, 57.5 mm tall, 72 mm deep — fits standard DIN-rail enclosures and mates with Siemens S00 contactors (e.g., 3RT1015 or 3RT1016 series) for a ganged auxiliary block. Wire capacity: accepts 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), or 2x 4 mm² solid conductors per terminal. Side clearance is 0 mm — zero gap required between adjacent devices — so it packs tight on the rail without derating for heat buildup in normal control loads. ## Electrical ratings and environment The 3 NO contacts are instantaneous only — no leading, lagging, delayed, or make-before-break options on this variant. AC-12 switching capacity at 230 V is 6 A, at 400 V is 3 A, and at 690 V is 1 A. For DC control circuits, the contacts handle 10 A at 24 V, 1 A at 110 V, and 0.27 A at 220 V — the DC ratings drop sharply with voltage due to arc extinction limits. Shock resistance: 10g / 5 ms and 5g / 10 ms. Maximum operating altitude 2 000 m without derating.","metaTitle":"Siemens 3RH1131-1BA40 SIRIUS Auxiliary Contactor, 10 A AC-12","metaDescription":"Siemens 3RH1131-1BA40 SIRIUS auxiliary contactor, size S00, 10 A AC-12 rated, 3 NO contacts, screw/snap-on mounting, IP20 front, current production. Sourced to order via 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","Maximum":"2 000 m","At The Side":"0 mm","Rated Value":"12 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":"3","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":"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","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=152213&mlfb=3RH1131-1BA40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1131-1BA40/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for the 3RH1131-1BA40?","answer":"It has 3 normally-open instantaneous contacts rated 10 A at AC-12 (maximum). DC ratings: 10 A at 24 V, 1 A at 110 V, 0.27 A at 220 V. AC ratings: 6 A at 230 V, 3 A at 400 V, 1 A at 690 V. Coil power is 3.2 W DC."},{"question":"What wire sizes does the 3RH1131-1BA40 accept?","answer":"Terminals accept 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), or 2x 4 mm² solid conductors."},{"question":"What is the mounting method and dimensions?","answer":"Screw and snap-on mounting on DIN rail. Dimensions: 45 mm wide, 57.5 mm tall, 72 mm deep. Side clearance is 0 mm."},{"question":"What is the closest functional alternative to the 3RH1131-1BA40?","answer":"The 3RT1015-1BB42 is a SIRIUS contactor of the same S00 frame size and can accept the same auxiliary block, but it is a main contactor with a coil, not a standalone auxiliary contactor. The 3RH1131-1BA40 is the dedicated auxiliary block for control-circuit switching; use it when you need only auxiliary contacts without a main power path."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1131-1BA40","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/3RH1131-1BA40 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}}