{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1431-1BD40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1431-1BD40","canonicalUrl":"https://aoctrl.com/siemens/3RH1431-1BD40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1431-1BD40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 3RH1431-1BD40, 42 V DC coil, 3 NO instantaneous contacts, screw and snap-on mounting, IP20 front.","salesMarkdown":"## Auxiliary contactor for control-circuit switching Its 42 V DC coil draws 3.2 W during both closing and holding, so the coil-supply sizing is straightforward — no inrush peak beyond the steady-state power. Solid conductors up to 4 mm² (or 2x 2.5 mm²) terminate in the screw terminals — strip length and ferrule sizing follow standard practice for this terminal class. ## Contact ratings and mechanical life The three NO contacts are rated for 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V — these are the AC-15 / DC-13 utilization categories typical for auxiliary contactors switching solenoid valves, contactor coils, and indicator lamps. Shock resistance is 10g for 5 ms and 5g for 10 ms, adequate for most industrial machinery vibration profiles.","metaTitle":"Siemens 3RH1431-1BD40 SIRIUS Auxiliary Contactor, 42 V DC, 3","metaDescription":"Siemens 3RH1431-1BD40 SIRIUS auxiliary contactor, size S00, 42 V DC coil, 3 NO contacts, 10 A at 24 V. Screw and snap-on mounting, IP20 front. Current 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":"90 mm","Height":"57.5 mm","Rated Value":"42 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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=257248&mlfb=3RH1431-1BD40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1431-1BD40/alternatives.json"},"ai":{"faq":[{"question":"What is the coil voltage and power draw for 3RH1431-1BD40?","answer":"The coil is rated 42 V DC and draws 3.2 W during both closing and holding. No inrush peak beyond the steady-state 3.2 W."},{"question":"What contact configuration does 3RH1431-1BD40 have?","answer":"Three normally open (3 NO) instantaneous contacts. No delayed, lagging, or make-before-break switching — all three close simultaneously on coil energization."},{"question":"What is the operating temperature range for 3RH1431-1BD40?","answer":"During operation: -25 to +60 °C. During storage and transport: -55 to +80 °C. The storage range exceeds the operating range, so handling and shipping limits are not the binding constraint."},{"question":"Where can I buy 3RH1431-1BD40 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1431-1BD40","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/3RH1431-1BD40 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}}