{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH6140-1BW40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH6140-1BW40","canonicalUrl":"https://aoctrl.com/siemens/3RH6140-1BW40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH6140-1BW40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS contactor relay, size S00, 3RH6140-1BW40, 48 VDC coil, 4 NO auxiliary contacts, screw-type terminals, snap-on 35 mm DIN rail mounting.","salesMarkdown":"It carries a 48 VDC coil and four normally open (4 NO) contacts, identified as switching element code 40 E. The 48 VDC control supply voltage means this relay is intended for DC-powered control panels, not AC coil circuits. That's the difference between a relay that works for years and one that gets swapped every six months on a pick-and-place line. That's useful when you're squeezing this into a tight gland-plate area and need to angle the block for wire access. Dimensions are 45 mm wide, 57.5 mm tall, 73 mm deep — fits the standard S00 footprint. Screw-type terminals for the auxiliary and control circuits accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm² solid/stranded, plus the AWG equivalents. Finely stranded wire needs core-end processing (ferrules). The 4 NO contacts are rated for different currents depending on the voltage and load type. At 24 V the contacts switch 6 A; at 110 V it's 3 A; at 220 V it's 1.2 A; at 230 V it's 10 A; at 400 V it's 3 A; at 690 V it's 1 A. The 230 V figure (10 A) likely reflects a resistive AC-12 load, while the lower values at higher voltages reflect the arc-quenching limits of the contact gap. For DC-12 and DC-13 loads, the maximum operating frequency is 1 000 switching cycles per hour. That's a long service life for a panel relay — you're not replacing this every year on a conveyor line. Installation altitude is limited to 2 000 m above sea level without derating. The substance prohibition date of 05/01/2012 aligns with RoHS compliance — this relay meets the EU RoHS directive for lead, mercury, and other restricted substances. That's a continuous-duty coil — no need for a separate holding-current economizer circuit.","metaTitle":"Siemens 3RH6140-1BW40 SIRIUS Contactor Relay, 48 VDC, 4 NO","metaDescription":"Siemens SIRIUS 3RH6140-1BW40 contactor relay, size S00, 48 VDC coil, 4 NO contacts, screw terminals, snap-on DIN rail mount. Active production. Sourced 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":"10 000 1/h","title":"3RH6140-1BW40","Height":"57.5 mm","Rated Value":"48 V","description":"Contactor relay, 4 NO, DC 48 V, size S00, screw terminal","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","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","Product Designation":"Contactor relay","at 24 V rated value":"6 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 690 V rated value":"1 A","Substance Prohibitance (Date)":"05/01/2012","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":"6 A","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","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)","number of NO contacts for auxiliary contacts":"4","Type Of Voltage Of The Control Supply Voltage":"DC","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","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ca9fde819111c1a881d3ee8aaaeb7d17.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=641398&mlfb=3RH6140-1BW40"},"ai":{"faq":[{"question":"What is the coil voltage for the 3RH6140-1BW40?","answer":"The control supply voltage is 48 V DC. Coil power consumption is 4 W for both closing and holding."},{"question":"Does the 3RH6140-1BW40 accept an auxiliary switch block?","answer":"Yes, the product extension for auxiliary switches is supported. Mechanical endurance with an added auxiliary switch block is 10 million operating cycles."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH6140-1BW40","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/3RH6140-1BW40 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}