{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH6131-1BM40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH6131-1BM40","canonicalUrl":"https://aoctrl.com/siemens/3RH6131-1BM40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH6131-1BM40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH6131-1BM40 contactor relay, size S00, 1 NC + 3 NO auxiliary contacts, DC 220 V coil, screw-type terminals, snap-on 35 mm DIN rail.","salesMarkdown":"The Siemens SIRIUS 3RH6131-1BM40 is a contactor relay — a control-circuit switching device, not a power contactor for motor loads. Its switching element configuration is identified as 31 E, meaning 1 normally-closed (NC) and 3 normally-open (NO) auxiliary contacts. This gives you four independent contact paths for interlocking, signaling, or logic functions in a control scheme. The coil is rated for DC control voltage at 220 V, drawing 4 W during both closing and holding — a constant-power coil design that simplifies the DC supply sizing. The 6 kV rated surge voltage resistance means the coil insulation withstands the transients common on 220 V DC control buses in industrial panels. That covers most panel layouts without needing a special bracket. Dimensions are 45 mm wide, 57.5 mm high, 73 mm deep — the S00 footprint. The screw-type terminals for auxiliary and control circuits accept 2x (0.5 to 1.5 mm²) solid/stranded, 2x (0.75 to 2.5 mm²), or 2x 4 mm². For AWG, that translates to 2x (20–16), 2x (18–14), or 2x 12 AWG. Finely stranded wire with core-end processing (ferrules) also fits the same cross-sections. ## Switching ratings and contact reliability At 24 V the contacts carry 6 A; at 110 V, 3 A; at 220 V, 1.2 A; at 230 V, 10 A; at 400 V, 3 A; at 690 V, 1 A. The 10 A at 230 V rating is the highest thermal current — that's the resistive load (AC-12) figure. For DC switching, the operating frequency maxes at 1 000 operations per hour for both DC-12 and DC-13. The mechanical endurance is 30 million switching cycles typical for the contactor relay alone, and 10 million typical when an auxiliary switch block is added.","metaTitle":"Siemens SIRIUS 3RH6131-1BM40 Contactor Relay, 1NC+3NO, DC 22","metaDescription":"Siemens SIRIUS 3RH6131-1BM40 contactor relay, size S00, 1 NC + 3 NO auxiliary contacts, DC 220 V coil, screw terminals, snap-on 35 mm DIN rail. Current production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Width":"45 mm","at AC":"10 000 1/h","at DC":"10 000 1/h","title":"3RH6131-1BM40","Height":"57.5 mm","Rated Value":"220 V","description":"Contactor relay, 3 NO + 1 NC, DC 220 V, size S00, screw terminal","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail","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","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Product Brand Name":"SIRIUS","Product Designation":"Contactor relay","at 24 V rated value":"6 A","Of Contactor Typical":"30 000 000","at 110 V rated value":"3 A","at 220 V rated value":"1.2 A","at 230 V rated value":"10 A","at 400 V rated value":"3 A","at 690 V rated value":"1 A","Substance Prohibitance (Date)":"05/01/2012","Product Extension Auxiliary Switch":"Yes","closing power of magnet coil at DC":"4 W","holding power of magnet coil at DC":"4 W","Surge Voltage Resistance Rated Value":"6 kV","operating frequency at DC-12 maximum":"1 000 1/h","operating frequency at DC-13 maximum":"1 000 1/h","operational current at AC-12 maximum":"6 A","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","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)","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","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","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","Design Of The Fuse Link For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","design of the miniature circuit breaker for short-circuit protection of the auxiliary circuit up to 230 V":"C characteristic: 6 A; 0.4 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/79cf31e8a05a36fe8bd632412f9dc80a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=641383&mlfb=3RH6131-1BM40"},"ai":{"faq":[{"question":"What is the contact configuration?","answer":"1 normally-closed (NC) and 3 normally-open (NO) auxiliary contacts, identified as switching element 31 E."},{"question":"What coil voltage does it use?","answer":"DC 220 V control supply voltage. Coil power is 4 W for both closing and holding."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH6131-1BM40","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/3RH6131-1BM40 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}