{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2131-1VB40-ZW97","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2131-1VB40-ZW97","canonicalUrl":"https://aoctrl.com/siemens/3RH2131-1VB40-ZW97","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2131-1VB40-ZW97","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2131-1VB40-ZW97 coupling relay, size S00, 24 VDC coil with diode surge suppressor, 3 instantaneous contacts, 10 A at 24 V / 230 V, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"## What this coupling relay does that a standard contactor cannot The 3RH2131-1VB40-ZW97 is a SIRIUS coupling relay — it switches auxiliary circuits, not motor loads. Its 3 instantaneous contacts handle 10 A at both 24 V and 230 V, meaning the same thermal current rating applies across the low-voltage and line-voltage range, so you don't need separate contactors for PLC-level and panel-level signals. The 24 VDC coil draws 1.6 W closing power and includes a built-in diode surge suppressor — that suppressor is polarity-sensitive, so the DC control wiring must respect the marked polarity. The pickup threshold is 0.85 of rated voltage, and dropout occurs at 1.85 times rated, giving a wide hysteresis band that prevents chatter on a sagging 24 V bus. ## Panel fit and spacing for size S00 Clearance requirements: 10 mm upward, forward, and downward, plus 6 mm at the sides. ## Wiring and environmental limits Pollution degree 3 means the relay is rated for conductive dust environments typical of industrial panels without conformal coating. Minimum relative humidity is 10% — relevant for dry, heated control rooms where electrostatic discharge risk rises. The mechanical endurance is 30,000,000 cycles typical, with a maximum AC switching rate of 10,000 operations per hour and DC pulse durations of 20 to 80 ms.","metaTitle":"Siemens 3RH2131-1VB40-ZW97 SIRIUS coupling relay, 24 VDC","metaDescription":"Siemens 3RH2131-1VB40-ZW97 SIRIUS coupling relay, size S00, 24 VDC coil with diode suppression, 3 instantaneous contacts rated 10 A at 24 V and 230 V.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Width":"45 mm","at AC":"10 000 1/h","at DC":"20 ... 80 ms","title":"3RH2131-1VB40-ZW97","Height":"57.5 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"24 V","description":"Coupling contactor relay, 3 NO+1 NC 24 V DC, 0.85-1.85*US with diode integrated Size S00 screw terminal Multi-unit packaging = 40 units","Initial Value":"0.85","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +50 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail","Full-Scale Value":"1.85","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","Degree Of Pollution":"3","Product Designation":"Coupling relay for switching auxiliary circuits","at 24 V rated value":"10 A","at 60 V rated value":"4.7 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 440 V rated value":"0.5 A","at 500 V rated value":"2 A","at 600 V rated value":"0.26 A","at 690 V rated value":"1 A","Instantaneous Contact":"3","Relative Humidity Minimum":"10 %","Substance Prohibitance (Date)":"10/01/2009","Design Of The Surge Suppressor":"diode","Product Extension Auxiliary Switch":"No","closing power of magnet coil at DC":"1.6 W","holding power of magnet coil at DC":"1.6 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":"10 A","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","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)","with low demand rate according to SN 31920":"40 %","with high demand rate according to SN 31920":"73 %","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","contact rating of auxiliary contacts according to UL":"A600 / Q600","Identification Number And Letter For Switching Elements":"31 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","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/ffbcd8cf9bb4f824494b9a5bf6af67f1.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=774119&mlfb=3RH2131-1VB40-ZW97"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RH2131-1VB40-ZW97?","answer":"The relay is a Siemens-specific SIRIUS size S00 design; the 6ED1052-1MD08-0BA1 is a LOGO! module, not a contactor, and will not drop into the same panel position without rewiring. For a drop-in replacement, source the identical 3RH2131-1VB40-ZW97."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2131-1VB40-ZW97","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/3RH2131-1VB40-ZW97 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}