{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1371-2FB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1371-2FB40","canonicalUrl":"https://aoctrl.com/siemens/3RH1371-2FB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1371-2FB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 24 V DC coil with integrated diode, 7 NO instantaneous contacts, 10 A AC-12 rated, screw and snap-on DIN rail mount, IP20 front.","salesMarkdown":"It carries 7 instantaneous normally-open (NO) contacts, each rated 10 A in AC-12 duty (resistive load at 400 V max), and is intended for signaling, interlocking, or extending the contact count on a main contactor or PLC output. The coil is 24 V DC with a built-in diode surge suppressor, so no external flyback diode is needed on the panel wiring. The 45 mm width and 60 mm height match the S00 footprint — same as a 3RT1 contactor of that frame size. Depth is 114 mm including terminals. Clearance at the side is 0 mm, so units can be ganged without spacing. Terminal solid capacity is 2x 0.25 to 2.5 mm² per clamp. The 10 A AC-12 rating is the maximum continuous current per contact for resistive loads at up to 400 V. For inductive or DC switching, derate per the listed values: 6 A at 230 V AC, 3 A at 400 V AC, 1 A at 690 V AC, and 10 A at 24 V DC, 1 A at 110 V DC, 0.27 A at 220 V DC. Coil holding power is a constant 3.2 W DC — no inrush spike to budget for. Shock resistance is 10g for 5 ms and 5g for 10 ms — sufficient for most machine-mounted panels.","metaTitle":"Siemens 3RH1371-2FB40 SIRIUS Auxiliary Contactor, 24 V DC, 7","metaDescription":"Siemens SIRIUS 3RH1371-2FB40 auxiliary contactor, size S00, 24 V DC coil with integrated diode suppression. 7 instantaneous NO contacts, rated 10 A AC-12. Current production, sourc","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"114 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":"24 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":"No","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":"10 000 000","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":"7","For Auxiliary Contacts":"0","Make-Before-Break Switching":"0","Design of the surge suppressor":"with diode","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":"1","Number of NO contacts for auxiliary contacts":"7","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":"71 E","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=123202&mlfb=3RH1371-2FB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1371-2FB40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 3RH1371-2FB40 and get a price?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"What are the key ratings of the 3RH1371-2FB40?","answer":"It has 7 NO instantaneous contacts rated 10 A AC-12, a 24 V DC coil with integrated diode suppression, and mounts on DIN rail in a 45 mm wide S00 footprint."},{"question":"Will the 3RH1371-2FB40 drop into a panel built for a 3RT1015-1BB42?","answer":"Yes — both are SIRIUS S00 size, same 45 mm width and DIN rail mount. The 3RH1371-2FB40 is an auxiliary contactor (7 NO, no main power contacts), while the 3RT1015-1BB42 is a power contactor with a coil and main poles. They share the same footprint and terminal spacing, so no rewiring of the DIN rail or busbar is needed for the auxiliary contactor itself."},{"question":"What is the depth of the 3RH1371-2FB40?","answer":"114 mm, including terminals."},{"question":"What wire size does the 3RH1371-2FB40 accept?","answer":"Solid wire 2x 0.25 to 2.5 mm² per terminal."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1371-2FB40","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/3RH1371-2FB40 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}}