{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2140-2BP40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2140-2BP40","canonicalUrl":"https://aoctrl.com/siemens/3RH2140-2BP40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2140-2BP40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2140-2BP40, auxiliary contactor, size S00, 4 NO instantaneous contacts, 10 A at 230 V, screw and snap-on mounting on 35 mm DIN rail.","salesMarkdown":"The Siemens 3RH2140-2BP40 is a SIRIUS auxiliary contactor in size S00, carrying 4 normally-open instantaneous contacts. It's the signal-switching sidekick to a main contactor or starter — extends the control circuit without adding another power device. Rated 10 A at both 24 V and 230 V, so it handles typical PLC-level loads and small valve solenoids across the common control voltages without derating at the low end. Mechanical life of 30 million operations means this contactor will outlast most machines it's installed in — the contacts, not the mechanism, will be the wear item. Coil draws 4 W DC both closing and holding — no inrush spike to sag your 24 VDC supply, and the constant draw simplifies thermal management in a dense panel. Accepts 2 x 0.5 to 4 mm² solid or stranded wire per terminal — standard for control wiring up to 10 A. The auxiliary switch block can be extended with additional contact modules if the 4 NO built-in isn't enough for your feedback or interlock scheme. RoHS compliance dated October 2009, so it meets the EU directive for new installations. No REACH or UL marking is stated in the available documentation.","metaTitle":"Siemens 3RH2140-2BP40 SIRIUS Auxiliary Contactor, 4 NO, S00,","metaDescription":"Siemens SIRIUS 3RH2140-2BP40 auxiliary contactor, size S00, 4 instantaneous NO contacts, rated 10A at 230V AC. Current lifecycle stage. Screw and snap-on mounting to 35mm DIN rail.","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":"70 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"230 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 ... 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 ... 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 ... 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 %","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","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":"spring-loaded 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/502af71de12eab902451f22104373e81.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=20357&mlfb=3RH2140-2BP40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2140-2BP40/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions for panel layout?","answer":"Width is 45 mm, depth is 73 mm, height is 70 mm. Allow 6 mm side clearance and 10 mm clearance above, below, and forward for arc flash and wiring access."},{"question":"What contact configuration does this auxiliary contactor have?","answer":"It has 4 normally-open instantaneous contacts, rated 10 A at 24 V and 230 V AC. Additional auxiliary switch blocks can be added if more contacts are needed."},{"question":"What temperature range can this contactor operate in?","answer":"Operating range is -25 to +60 °C. Storage range is -55 to +80 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2140-2BP40","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/3RH2140-2BP40 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}}