{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH7140-1AG00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH7140-1AG00","canonicalUrl":"https://aoctrl.com/siemens/3RH7140-1AG00","factsUrl":"https://aoctrl.com/api/mcp/products/3RH7140-1AG00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, contactor relay, size S00, 3RH7140-1AG00, 4 NO auxiliary contacts, AC coil, screw-type terminals, IP20 front protection.","salesMarkdown":"The 3RH7140-1AG00 is a Siemens SIRIUS contactor relay in the S00 frame size, carrying 4 normally-open auxiliary contacts (configuration 40 E) and an AC-operated coil. It's a current-production part, so the BOM line is stable for new builds and spares alike. The 4 NO contacts are rated for switching at several common control voltages: 6 A at 24 V, 110 V, 230 V, and 400 V AC; 1 A at 690 V AC; and 0.3 A at 220 V AC. The contacts are rated for PLC-level reliability down to 17 V, 5 mA — that's the 'acceptability for PLC control' spec. It means the silver-alloy contacts are designed to switch dry logic-level signals without the oxide-film issues that plague standard power contacts at low energy. If you're feeding a 24 V DC digital input card, these won't give you a phantom open. Coil draw is 27 VA pick-up, 5.4 VA holding at AC, power factor 0.8 and 0.27 respectively. That holding VA is low — about 45 mA at 120 V — so the PLC output driving it sees a light load once the relay seals in. The 7 kV surge voltage resistance means the coil withstands common-mode transients on a dirty line without flashover. Insulation is rated 690 V AC at pollution degree 3, so it's suited for 480 V panels where the environment isn't climate-controlled. The S00 footprint is compact — 45 mm wide, 72 mm deep, 57.5 mm tall — so it fits in a crowded panel without hogging the DIN rail. That helps when the gland plate forces an odd orientation. Screw terminals accept 2 x 0.5 to 1.5 mm² solid or stranded, or 2 x 0.75 to 2.5 mm², or a single 4 mm². That's enough for a daisy-chain through the auxiliary contacts without piggyback terminals. Finely stranded wire with ferrules is also supported at the same ranges. The product extension for auxiliary switches means you can add a side-mount block later if 4 NO isn't enough — the base relay already carries the mechanical interface for it. Operating temperature is -10 to +55 °C; storage from -25 to +70 °C. Installation altitude is limited to 2 000 m above sea level — above that, derate the insulation or use a higher-voltage class relay. Shock resistance is 15g / 5 ms and 8g / 10 ms for sine pulse; 10g / 5 ms and 5g / 10 ms for rectangular impulse. That's typical for a relay that might live on a machine frame near a press or conveyor impact zone. The DC-13 operating frequency maxes at 1 000 operations per hour — about one cycle every 3.6 seconds, which is fine for most PLC-driven sequences.","metaTitle":"Siemens 3RH7140-1AG00 SIRIUS Contactor Relay, 4 NO, AC Coil","metaDescription":"Siemens SIRIUS 3RH7140-1AG00 contactor relay, size S00, 4 NO auxiliary contacts, AC coil, screw terminals, IP20, current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"72 mm","Width":"45 mm","title":"3RH7140-1AG00","Height":"57.5 mm","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","description":"Contactor relay 4NO 36V 50/60Hz AC 36V 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":"36 V","at 60 Hz rated value":"36 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":"7 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/1d8ff806b997d3d0b33f1eeb4459e6e8.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1533825&mlfb=3RH7140-1AG00"},"ai":{"faq":[{"question":"What are the key switching ratings for the 3RH7140-1AG00?","answer":"The 4 NO contacts are rated 6 A at 24 V, 110 V, 230 V, and 400 V AC; 1 A at 690 V AC; and 0.3 A at 220 V AC. The contacts are also rated for PLC-level reliability at 17 V, 5 mA."},{"question":"Will the 3RH7140-1AG00 drop into a panel specified around a 3RH2422-1AB00?","answer":"Not without checking the footprint and wiring. The 3RH7140 is a size S00 relay (45 mm wide), while the 3RH2422 is a different frame size. The DIN-rail mounting method is the same 35 mm rail, but the terminal layout and contact configuration differ. Verify the panel cutout and wiring diagram before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH7140-1AG00","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/3RH7140-1AG00 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}}