{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2140-1BM40-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2140-1BM40-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RH2140-1BM40-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2140-1BM40-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2140-1BM40-ZX95 auxiliary contactor block, size S00, 4 NO instantaneous contacts, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"Rated for 10 A at both 24 V and 230 V, it handles pilot-duty and signal-level loads across a wide voltage range — 4.7 A at 60 V, 3 A at 110 V, 1.2 A at 220 V, 3 A at 400 V, 2 A at 500 V, 1 A at 690 V, and lower currents at 440 V (0.5 A) and 600 V (0.26 A) — so the same block works in 24 VDC control circuits and 230 VAC motor starter feedback loops without derating surprises. ## Mounting and integration details The S00 footprint — 45 mm wide, 58 mm high, 73 mm deep — fits alongside S00 contactors in a compact row, with clearance requirements of 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side for heat dissipation and wiring access. Terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm² solid or stranded wire, plus AWG equivalents 2x (20 to 16), 2x (18 to 14), and 2x 12. Screw-type clamping, so strip length and torque matter — the 4 mm² capacity means you can loop through for daisy-chained commons without a separate terminal block. RoHS compliance date of October 1, 2009, covering substance restrictions.","metaTitle":"Siemens 3RH2140-1BM40-ZX95 Auxiliary Switch, S00, 4 NO conta","metaDescription":"Siemens 3RH2140-1BM40-ZX95 auxiliary contactor block, size S00, 4 NO contacts, rated 10 A at 24 V and 230 V, screw/snap-on 35 mm DIN rail, active production.","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":"220 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","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":"https://cdn.aoctrl.com/07703f253dd7b399102b404590f21b32.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1684628&mlfb=3RH2140-1BM40-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2140-1BM40-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What are the key switching ratings for this auxiliary contactor block?","answer":"It is rated 10 A at 24 V and 230 V, with derated values at other voltages: 4.7 A at 60 V, 3 A at 110 V and 400 V, 1.2 A at 220 V, 2 A at 500 V, 1 A at 690 V, 0.5 A at 440 V, and 0.26 A at 600 V."},{"question":"What are the physical dimensions and mounting requirements?","answer":"Width 45 mm, height 58 mm, depth 73 mm. Mounts on 35 mm DIN rail via snap-on or screw-mount. Requires 10 mm clearance upwards, forwards, and downwards, and 6 mm at the sides."},{"question":"What compliance documentation is available for this part?","answer":"Rated for pollution degree 3, operating temperature -25 to +60 °C, storage -55 to +80 °C. RoHS compliance effective October 1, 2009."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2140-1BM40-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/3RH2140-1BM40-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}}