{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1431-1BM40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1431-1BM40","canonicalUrl":"https://aoctrl.com/siemens/3RH1431-1BM40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1431-1BM40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 3 NO + 1 NC, 10 A AC-12, 220 V DC coil, screw and snap-on mounting, IP20 front, 90 x 57.5 x 72 mm.","salesMarkdown":"## Auxiliary contactor for control-circuit switching It carries 3 instantaneous normally-open contacts and 1 normally-closed contact, rated 10 A at AC-12 (resistive control-circuit duty) and 10 A at 24 V DC. The DC coil pulls 3.2 W to close and holds at 3.2 W — no AC hum, no power drop after pick-up. The 90 mm width, 57.5 mm height, and 72 mm depth fit the S00 footprint — zero side clearance needed, so you can gang them tight in a panel. ## Contact ratings across the voltage range The contacts are rated for switching at multiple control voltages: 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. At 110 V the rating is 1 A, and at 220 V it's 0.27 A. These are the thermal current limits for the contact set — match your control-circuit voltage to the appropriate row to avoid overstressing the contacts. Mechanical endurance is rated at 5 000 000 cycles typical for the contactor size. Shock resistance is 10g / 5 ms and 5g / 10 ms, and the operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C. ## Wiring and mounting flexibility Terminals accept solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm².","metaTitle":"Siemens 3RH1431-1BM40 SIRIUS Auxiliary Contactor, 10 A AC-12","metaDescription":"Siemens SIRIUS 3RH1431-1BM40 auxiliary contactor, size S00, 3 NO + 1 NC, 10 A AC-12, 220 V DC coil, screw/snap-on mount, IP20 front. Sourced to order; RFQ for price and availabilit","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","Maximum":"2 000 m","At The Side":"0 mm","Rated Value":"220 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":"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","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":"5 000 000","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=208662&mlfb=3RH1431-1BM40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1431-1BM40/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RH1431-1BM40?","answer":"Submit an RFQ through the storefront. The part is sourced to order; pricing and stock are confirmed at quote time."},{"question":"What is the closest functional second-source to 3RH1431-1BM40?","answer":"The 3RH2140-1BP40 is a similar SIRIUS auxiliary contactor but with a different contact configuration and coil voltage — verify the contact arrangement and coil rating before substituting."},{"question":"What is the depth of 3RH1431-1BM40?","answer":"The depth is 72 mm."},{"question":"What wire sizes does 3RH1431-1BM40 accept?","answer":"It accepts solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm²."},{"question":"Will 3RH1431-1BM40 drop into a panel specified around 3RH2140-1BP40 without rewiring?","answer":"Both are SIRIUS size S00 with the same mounting footprint and terminal spacing, so mechanical fit is the same. However, verify the coil voltage and contact configuration — the 3RH1431-1BM40 uses a 220 V DC coil and 3 NO + 1 NC contacts, which may differ from the 3RH2140-1BP40."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1431-1BM40","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/3RH1431-1BM40 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}}