{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1131-1BK80","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1131-1BK80","canonicalUrl":"https://aoctrl.com/siemens/3RH1131-1BK80","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1131-1BK80","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 3RH1131-1BK80, 4 NO + 0 NC, 52 V DC coil, screw and snap-on mounting, IP20 front.","salesMarkdown":"The 52 V DC coil draws 3.2 W on pickup and hold, so the control transformer and rectifier can be sized for that continuous load. That matters when you're squeezing it into a crowded gland-plate area or a swing-frame subpanel. ## Switching capacity by voltage — what it actually handles The contact ratings are given at specific voltages, not a single blanket current. At 24 V rated value it switches 10 A; at 110 V rated value it drops to 1 A; at 230 V rated value it handles 6 A; at 400 V rated value it's 3 A; at 500 V rated value 2 A; at 690 V rated value 1 A. The 220 V rated value figure of 0.27 A is notably lower than the 230 V figure — that's the DC switching curve for that coil voltage band, not a typo. For a 24 VDC pilot circuit, the 10 A rating gives comfortable headroom for a bank of solenoid valves or indicator lamps. ## Wiring and integration details The screw terminals accept solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm². AWG equivalents are 2x (20 to 16), 2x (18 to 14), or 1x 12. That covers most control-circuit wiring from signal-level through motor-circuit interposing. The 72 mm depth, 45 mm width, and 57.5 mm height keep it within the S00 footprint — fits alongside contactors and relays on the same DIN rail without overhang. That's the dry-circuit performance — important when switching PLC inputs or low-energy signals where oxide films on silver contacts can cause intermittent failures. ## Environmental and electrical robustness Shock resistance is 10g at 5 ms and 5g at 10 ms. Pollution degree 3.","metaTitle":"Siemens SIRIUS 3RH1131-1BK80 Auxiliary Contactor, 4 NO + 0 N","metaDescription":"Siemens SIRIUS 3RH1131-1BK80 auxiliary contactor, size S00, 4 NO contacts, 52 V DC coil. Rated 10 A at 24 V, IP20 front. Screw and snap-on DIN rail mount. Current lifecycle: active","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":"45 mm","Height":"57.5 mm","Rated Value":"52 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":"30 000 000","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":"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","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=532210&mlfb=3RH1131-1BK80","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1131-1BK80/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative if 3RH1131-1BK80 is not available?","answer":"The closest functional peer is the 3RH2122-1BW40, which is a size S00 auxiliary contactor with a different contact configuration (2 NO + 2 NC) and a different coil voltage. It shares the same physical footprint and mounting, so it drops into the same panel location without rewiring the base, but the contact arrangement and coil must match the circuit design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1131-1BK80","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/3RH1131-1BK80 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}}