{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1431-1BF40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1431-1BF40","canonicalUrl":"https://aoctrl.com/siemens/3RH1431-1BF40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1431-1BF40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, 3RH1431-1BF40, 110 VDC coil, 3 NO + 1 NC contacts, size S00, screw and snap-on mounting.","salesMarkdown":"It carries 3 normally open and 1 normally closed instantaneous contacts, with a 110 VDC coil. Sized to the S00 frame, it mates directly with S00 contactors like the 3RT1 series for a compact, ganged assembly on a DIN rail or screw panel. The coil pulls in at 110 VDC, consuming 3.2 W both during pick-up and hold — no economizer circuit needed. The contacts are rated for switching at different voltages: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V. These are the maximum continuous currents the contacts can make and break under resistive (AC-1) duty. For motor or inductive loads, derate per the AC-15 utilization category typical for auxiliary contacts. Wire terminals accept solid conductors: 2x 0.5...1.5 mm², 2x 0.75...2.5 mm², or 2x 4 mm².","metaTitle":"Siemens SIRIUS 3RH1431-1BF40 Auxiliary Contactor, 110 VDC Co","metaDescription":"Siemens SIRIUS 3RH1431-1BF40 auxiliary contactor, 110 VDC coil, 3 NO + 1 NC contacts, size S00. Active production, screw and snap-on mounting, IP20 front. Sourced to order against","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":"90 mm","Height":"57.5 mm","Rated Value":"110 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":"5 000 000","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","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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 %","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":"5 000 000","Type Of Electrical Connection For Auxiliary And Control Circuit":"screw-type 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":"https://cdn.aoctrl.com/daeb55ef2fd1cb440d702fa597738ba6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=335823&mlfb=3RH1431-1BF40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1431-1BF40/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of this auxiliary contactor?","answer":"The depth is 72 mm."},{"question":"What wire sizes does it accept?","answer":"Solid conductors: 2x 0.5...1.5 mm², 2x 0.75...2.5 mm², or 2x 4 mm²."},{"question":"Will the 3RH1431-1BF40 drop into a panel designed for the 3RH2422-1AB00?","answer":"Both are S00 frame auxiliary contactors with screw/snap-on mounting, so the footprint and DIN-rail clip pattern are the same. The main difference is the contact configuration: 3RH1431-1BF40 has 3 NO + 1 NC, while the 3RH2422-1AB00 has a different arrangement. Verify your circuit's NO/NC count before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1431-1BF40","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/3RH1431-1BF40 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}}