{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH7140-1AF00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH7140-1AF00","canonicalUrl":"https://aoctrl.com/siemens/3RH7140-1AF00","factsUrl":"https://aoctrl.com/api/mcp/products/3RH7140-1AF00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, contactor relay, 3RH7140-1AF00, size S00, 4 NO contacts, AC coil, screw terminals, 45 mm width, 72 mm depth.","salesMarkdown":"It's the control-circuit side of a motor starter — the relay that picks up from a PLC output or pushbutton and in turn drives the main contactor coil. The 4 NO arrangement means it can handle multiple signal paths: feedback to the PLC, a holding circuit, and a run light, all from one device. Rated operational current varies by voltage: 6 A at 24 V, 230 V, and 400 V; 1 A at 110 V and 690 V; 0.3 A at 220 V. That 6 A at 400 V is the figure that matters for driving a contactor coil — it's well above the typical 2-3 A inrush of a SIRIUS S0 or S2 contactor. The 690 V rating at 1 A covers control circuits in 480/575 V panels without a step-down transformer. Coil pick-up power is 27 VA, holding at 5.4 VA (inductive power factor 0.8 and 0.27 respectively). That's a standard AC magnet coil draw — the PLC output or interposing relay driving it needs to handle the 27 VA inrush, not just the 5.4 VA hold. The 9 kV surge voltage resistance (impulse withstand) means it's rated for the transient environment of an industrial panel without external suppression on the coil. Mounts on 35 mm standard DIN rail via the integrated snap-on latch, or can be screw-mounted directly to a backplate. The S00 footprint is compact: 45 mm wide, 72 mm deep, 57.5 mm tall. That's useful when you're squeezing relays into a crowded sub-panel or a swing frame. Screw-type terminals on the control circuit accept 2x 0.5 to 2.5 mm² solid or stranded, or 2x 4 mm². Finely stranded with ferrule is also supported.","metaTitle":"Siemens 3RH7140-1AF00 SIRIUS Contactor Relay, 4 NO, S00, 690","metaDescription":"Siemens SIRIUS 3RH7140-1AF00 contactor relay, size S00, 4 NO auxiliary contacts, 690 V insulation voltage, AC coil. Current lifecycle stage. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"72 mm","Width":"45 mm","title":"3RH7140-1AF00","Height":"57.5 mm","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","description":"Contactor relay 4NO AC 110V 50/60Hz size S00, screw terminal","During Storage":"-25 ... +70 °C","lifecycle_stage":"current","During Operation":"-10 ... +55 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting 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","at 110 V rated value":"1 A","at 220 V rated value":"0.3 A","at 230 V rated value":"6 A","at 400 V rated value":"6 A","at 50 Hz rated value":"110 V","at 60 Hz rated value":"110 V","at 690 V rated value":"1 A","protection class IP on the front":"IP20","Product Extension Auxiliary Switch":"Yes","Surge Voltage Resistance Rated Value":"9 kV","operating frequency at DC-13 maximum":"1 000 1/h","shock resistance with sine pulse at AC":"15g / 5 ms, 8g / 10 ms","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Contact Reliability Of Auxiliary Contacts":"acceptability for PLC control (17 V, 5 mA)","apparent holding power of magnet coil at AC":"5.4 VA","apparent pick-up power of magnet coil at AC":"27 VA","number of NO contacts for auxiliary contacts":"4","Type Of Voltage Of The Control Supply Voltage":"AC","shock resistance at rectangular impulse at AC":"10g / 5 ms, 5g / 10 ms","Inductive Power Factor With Closing Power Of The Coil":"0.8","Identification Number And Letter For Switching Elements":"40 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.27","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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/33d084f5662d44739e9d1c293a83e925.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1533824&mlfb=3RH7140-1AF00"},"ai":{"faq":[{"question":"What is 3RH7140-1AF00 used for?","answer":"It's a contactor relay (size S00) with 4 NO auxiliary contacts, used to switch control signals — typically driving a main contactor coil from a PLC output or pushbutton, or providing feedback contacts back to the controller."},{"question":"Will 3RH7140-1AF00 drop into a panel specified around 3RH6140-1AP00?","answer":"Both are SIRIUS S00 contactor relays with the same DIN-rail footprint and screw-terminal layout. The 3RH7140-1AF00 has 4 NO contacts (code 40 E) versus the 3RH6140-1AP00 which has a different contact arrangement — check your control schematic for NO/NC count before swapping. Mechanically, it fits the same rail and panel cutout."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH7140-1AF00","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/3RH7140-1AF00 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}}