{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2140-1BF40-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2140-1BF40-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RH2140-1BF40-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2140-1BF40-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2140-1BF40-ZX95, size S00 auxiliary contactor block, 4 NO contacts, 110 VDC coil, 45 mm wide, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"The 3RH2140-1BF40-ZX95 is a Siemens SIRIUS auxiliary contactor block in size S00, carrying four instantaneous NO contacts and a 110 VDC-rated magnet coil. The product extension for an auxiliary switch is built in, so you can stack additional contact blocks on the same contactor without reworking the wiring tray. The coil draws 4 W during both closing and holding. The 110 VDC rated coil holds at 0.8 x rated and drops out above 1.1 x rated. Contact ratings are given per voltage: 10 A at 24 VDC and 230 VAC, 3 A at 110 VDC, 1.2 A at 220 VDC, dropping to 0.26 A at 600 VDC. The DC-12 operating frequency maxes out at 1,000 cycles per hour — that governs how fast you can cycle a DC load before the contacts need thermal recovery. Arcing time sits between 10 and 15 ms, with a DC arcing time of 7 to 13 ms. That matters for interlocking circuits where you need to guarantee the NC opens before the NO closes — the overlap window is tight, so sequence timers or mechanical interlocks are still the safer call for reversing starters. Storage range is -55 °C to +80 °C — that's the shipping and shelf-life window, not the running band. Relative humidity floor is 10 %, so no special climate-controlled storage required for spares.","metaTitle":"Siemens 3RH2140-1BF40-ZX95 Auxiliary Switch, S00, 110 VDC, 4","metaDescription":"Siemens 3RH2140-1BF40-ZX95 auxiliary contactor block, size S00, 45 mm wide, rated 110 VDC coil. Screw and snap-on DIN rail mount. Active lifecycle, sourced to order. Request RFQ fo","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":"7 ... 13 ms","Height":"58 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"110 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","Degree Of Pollution":"3","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","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","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":"https://cdn.aoctrl.com/c045106ebfa92133aeae8450ce015119.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1684635&mlfb=3RH2140-1BF40-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2140-1BF40-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to 3RH2140-1BF40-ZX95?","answer":"The 3RH2140-1BP40 is a close peer in the same SIRIUS S00 family, sharing the same 4 NO contact configuration and 45 mm width. The key difference is the coil voltage — 3RH2140-1BP40 uses a different coil rating. Verify coil voltage compatibility before substituting; the mechanical footprint and mounting are identical, so it drops into the same DIN rail slot without rewiring the panel layout."},{"question":"What compliance documentation does Siemens provide for this part?","answer":"The part carries a substance prohibition date of October 1, 2009, indicating RoHS compliance. Standard Siemens SIRIUS documentation includes CE declaration of conformity and UL/CSA file listings; these are available through the manufacturer's support portal or upon request with an RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2140-1BF40-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/3RH2140-1BF40-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}}