{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2140-1BB40-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2140-1BB40-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RH2140-1BB40-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2140-1BB40-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 4 NO contacts, 24 VDC coil, screw and snap-on mounting onto 35 mm DIN rail, 45 x 57.5 x 73 mm.","salesMarkdown":"The Siemens 3RH2140-1BB40-ZX95 is a SIRIUS auxiliary contactor in frame size S00 — a compact 45 mm wide, 57.5 mm tall, 73 mm deep block that screws or snaps onto 35 mm DIN rail. It carries four normally-open instantaneous contacts, coil rated 24 VDC with a closing and holding power draw of 4 W. This is the part you reach for when a contactor or starter needs extra signal contacts, or when you're building a dedicated interlock chain in a control panel. ## Contact ratings — what the numbers mean At higher DC voltages the current drops sharply — 4.7 A at 60 V, 1.2 A at 220 V, 0.26 A at 600 V — because DC arcs are harder to extinguish. Arcing time runs 10 to 15 ms. That's the spec-sheet story; the real-world takeaway is that this is a signal-duty block, not a power-switching device — use it for control circuits, PLC inputs, auxiliary relays, and contactor coils, not for motor loads directly. Wire termination accepts 2x 0.5 to 1.5 mm² solid/stranded, 2x 0.75 to 2.5 mm², or 2x 4 mm².","metaTitle":"Siemens 3RH2140-1BB40-ZX95 SIRIUS Auxiliary Contactor, 4 NO,","metaDescription":"Siemens SIRIUS auxiliary contactor 3RH2140-1BB40-ZX95, size S00, 4 NO contacts, 24 VDC coil, screw/snap-on 35 mm DIN rail. Rated 10 A at 230 V AC. Current production. Sourced to or","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":"7 ... 13 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":"0.8","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","Full-Scale Value":"1.1","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":"Auxiliary contactor","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","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","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","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","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","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","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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=194479&mlfb=3RH2140-1BB40-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2140-1BB40-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RH2140-1BB40-ZX95?","answer":"The depth is 73 mm. Combined with a width of 45 mm and height of 57.5 mm, it fits the standard S00 footprint."},{"question":"Will 3RH2140-1BB40-ZX95 drop into a panel specified for 3RH2140-1BP40 without rewiring?","answer":"Both are SIRIUS S00 auxiliary contactors with the same mounting footprint and screw/snap-on DIN rail attachment. The -1BP40 variant has a different coil voltage; the mechanical fit is identical, so no panel rework is needed if the coil voltage matches your circuit."},{"question":"What compliance documentation does Siemens provide for 3RH2140-1BB40-ZX95?","answer":"The part carries a RoHS substance prohibition date of 10/01/2009, indicating compliance with the EU RoHS directive. Standard Siemens SIRIUS documentation includes a CE declaration of conformity and IEC/EN 60947-5-1 test reports. UL and CSA listings are typical for the S00 frame but should be verified against the specific variant."},{"question":"How do I get current pricing and availability for 3RH2140-1BB40-ZX95?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for current pricing and availability — the quote will reflect real-time market conditions."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2140-1BB40-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/3RH2140-1BB40-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}}