{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1131-1BW40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1131-1BW40","canonicalUrl":"https://aoctrl.com/siemens/3RH1131-1BW40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1131-1BW40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, 3RH1131-1BW40, 48 VDC coil, 10 A AC-12, 3 NO + 1 NC, size S00, 45 mm wide, screw and snap-on mounting.","salesMarkdown":"The Siemens SIRIUS 3RH1131-1BW40 is a size S00 auxiliary contactor rated for 48 VDC coil voltage, delivering 10 A at AC-12 (resistive) duty. It carries three instantaneous normally-open contacts and one normally-closed auxiliary switch, all rated for 6 kV surge voltage resistance. Pollution degree 3 suits industrial environments. ## Wiring and contact ratings Solid wire capacity is 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm² — covers most control-circuit terminations without ring lugs. The coil draws 3.2 W closing and holding, so no inrush spike to size a power supply around. AC-12 rating at 10 A is the resistive load limit; derate for inductive or motor loads per the switching curves. At 230 V AC the contact rating drops to 6 A, at 400 V AC to 3 A, and at 690 V AC to 1 A — the voltage derating is steep above 230 V.","metaTitle":"Siemens SIRIUS 3RH1131-1BW40 Auxiliary Contactor, 48 VDC, 10","metaDescription":"Siemens SIRIUS 3RH1131-1BW40 auxiliary contactor, 48 VDC coil, 10 A AC-12, 3 NO + 1 NC, size S00, 45 mm wide. Active production. 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":"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":"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=103886&mlfb=3RH1131-1BW40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1131-1BW40/alternatives.json"},"ai":{"faq":[{"question":"What is the rated control voltage for 3RH1131-1BW40?","answer":"The rated control supply voltage is 48 V DC."},{"question":"What is the maximum AC-12 current rating?","answer":"The maximum operating current at AC-12 (resistive) is 10 A."},{"question":"What wire sizes does the terminal accept?","answer":"Solid wire: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm²."},{"question":"Where can I buy 3RH1131-1BW40 and how is it quoted?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm quote."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1131-1BW40","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/3RH1131-1BW40 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}}