{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2140-1SB40-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2140-1SB40-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RH2140-1SB40-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2140-1SB40-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling relay, size S00, 4 NO instantaneous contacts, 24 VDC coil, 10 A rated current, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"The Siemens SIRIUS 3RH2140-1SB40-ZX95 is a coupling relay — a size S00 auxiliary contactor block — designed for switching auxiliary circuits in control panels. It carries 4 normally-open instantaneous contacts rated at 10 A at both 24 V and 230 V, making it a straightforward interface between a PLC output or pushbutton and a higher-current load like a contactor coil or indicator bank. The coil pulls in at 24 VDC with a closing power of 1.6 W and includes a built-in suppressor diode, so you don't need to add external flyback protection across the coil terminals — the diode handles the inductive kick on de-energization. That's one less component to spec and wire per the datasheet. The S00 footprint measures 45 mm wide, 57.5 mm tall, and 73 mm deep — a compact envelope that leaves room for adjacent devices in a crowded enclosure. That's enough for airflow and tool access in a typical panel layout. Wire terminations accept 2 x 0.5 to 1.5 mm² solid or stranded, 2 x 0.75 to 2.5 mm², or 2 x 4 mm² — covers most control-circuit wiring gauges. ## Electrical ratings and environment Rated operational current is 10 A at 24 V and 230 V, with lower values at higher voltages: 4.7 A at 60 V, 3 A at 110 V and 400 V, 1.2 A at 220 V, 0.5 A at 440 V, 2 A at 500 V, 0.26 A at 600 V, and 1 A at 690 V. These are the AC-15 / DC-13 switching capacities per the datasheet — use the voltage-specific figure when sizing for a given circuit. Relative humidity minimum is 10 %, so it's fine in dry climates or air-conditioned rooms. Mechanical endurance is 30 million operations typical. For DC switching, the minimum on-time is 5 to 20 ms — relevant when driving fast-cycling loads like solenoid valves. RoHS compliance is confirmed with a substance prohibition date of 10/01/2009, covering the original EU RoHS directive. The product extension auxiliary switch is listed as 'No' — this is the base relay without add-on contact blocks, so plan for that if your circuit needs more than 4 NO contacts.","metaTitle":"Siemens 3RH2140-1SB40-ZX95 SIRIUS Coupling Relay, 4 NO, 24 V","metaDescription":"Siemens SIRIUS 3RH2140-1SB40-ZX95 coupling relay, size S00, 4 NO instantaneous contacts, 24 VDC coil, 10 A rated current. DIN rail mount. Active production. Available to order.","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":"5 ... 20 ms","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","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":"4","Relative Humidity Minimum":"10 %","Substance Prohibitance (Date)":"10/01/2009","Design Of The Surge Suppressor":"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 NO contacts for auxiliary contacts":"4","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":"40 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,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a0960b74310a0f37359d70a92c32e8db.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1046688&mlfb=3RH2140-1SB40-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2140-1SB40-ZX95/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RH2140-1SB40-ZX95 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the depth of 3RH2140-1SB40-ZX95?","answer":"The depth is 73 mm, with a width of 45 mm and height of 57.5 mm — the S00 DIN-rail footprint."},{"question":"Will 3RH2140-1SB40-ZX95 drop into a panel specified for 3RH2122-1WB40?","answer":"Both are S00 size on 35 mm DIN rail, so the mechanical fit is identical. The 3RH2140-1SB40-ZX95 has 4 NO contacts versus the 3RH2122-1WB40's 2 NO + 2 NC configuration — verify your circuit's contact arrangement before substituting."},{"question":"What compliance documentation does this brand provide?","answer":"RoHS compliance is confirmed per the substance prohibition date of 10/01/2009. The SIRIUS series carries CE marking and is designed to IEC/EN 60947-5-1 standards. UL and CSA listings are typical for this product family but should be verified against the specific variant's markings."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2140-1SB40-ZX95","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/3RH2140-1SB40-ZX95 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}}