{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1431-1BB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1431-1BB40","canonicalUrl":"https://aoctrl.com/siemens/3RH1431-1BB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1431-1BB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 3RH1431-1BB40, 24 V DC coil, 3 NO instantaneous contacts, rated 10 A at 24 V, screw and snap-on mounting, IP20 front.","salesMarkdown":"The Siemens 3RH1431-1BB40 is a SIRIUS auxiliary contactor in size S00 — a compact, 3-pole normally-open switching block meant for control circuits, not motor loads. Its 24 V DC coil pulls in at 0.8 x rated voltage (about 19.2 V) and holds at 3.2 W DC, so the power supply needs to deliver that continuously, not just the inrush. The three NO contacts are rated for 10 A at 24 V, and derate predictably at higher voltages: 6 A at 230 V, 3 A at 400 V, 1 A at 690 V. That's the contact rating for AC loads; for DC switching, check the same table — 1 A at 110 V, 0.27 A at 220 V. That helps when you're packing a dense panel and need to orient the contactor to reach the wiring ducts. ## Wiring and contact configuration Terminals accept solid or stranded wire: 2x 0.5...1.5 mm², 2x 0.75...2.5 mm², or 2x 4 mm² per clamp. For AWG, that's 2x 20...16, 2x 18...14, or 1x 12. The three instantaneous contacts are all NO — no NC or changeover built in. If you need a delayed or make-before-break contact, this variant doesn't offer it (those flags are zero). But the product extension auxiliary switch is listed as 'Yes', meaning you can add a separate auxiliary switch block on top if the circuit demands an NC or extra NO. ## Environmental and electrical endurance Rated for pollution degree 3. Shock resistance is 10g / 5 ms and 5g / 10 ms. Mechanical life is 5 million operating cycles typical.","metaTitle":"Siemens 3RH1431-1BB40 SIRIUS Auxiliary Contactor, 24 VDC, 3","metaDescription":"Siemens 3RH1431-1BB40 SIRIUS auxiliary contactor, size S00, 24 VDC coil, 3 NO contacts, rated 10 A at 24 V. IP20 front, screw and snap-on mounting. Active production, sourced to or","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":"24 V","Initial Value":"0.8","Leading Contact":"0","lifecycle_stage":"current","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","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)":"01.07.2006 00:00:00","protection class IP on the front":"IP20","Ambient Temperature During Storage":"-55 ... +80 °C","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","reference code acc. to IEC 81346-2":"K","Ambient Temperature During Operation":"-25 ... +60 °C","Ambient Temperature During Transport":"-55 ... +80 °C","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","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 (0.5 ... 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","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","B10 value with high demand rate acc. to SN 31920":"1 000 000; With 0.3 x Ie","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=204355&mlfb=3RH1431-1BB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1431-1BB40/alternatives.json"},"ai":{"faq":[{"question":"What is 3RH1431-1BB40's listed depth?","answer":"The depth is 72 mm, width is 90 mm, height is 57.5 mm — size S00 footprint, compact enough for tight DIN-rail layouts."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1431-1BB40","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/3RH1431-1BB40 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}}