{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1140-1AF10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1140-1AF10","canonicalUrl":"https://aoctrl.com/siemens/3RH1140-1AF10","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1140-1AF10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, Size S00, 4 NO instantaneous contacts, 10 A AC-12 rated, 24 V coil, screw and snap-on mounting, IP20 front protection.","salesMarkdown":"The 4 NO contacts are all instantaneous — no leading, lagging, or make-before-break timing — which means this is a straight signal repeater, not a sequenced switching block. That keeps the wiring simple: land your control wires on the spring-cage terminals (accepts 0.5 to 4 mm² solid or 20–12 AWG) and it mirrors the main contactor's state. Size S00 is the smallest SIRIUS frame — 45 mm wide, 57.5 mm tall, 72 mm deep — so it tucks into tight DIN-rail rows alongside the matching 3RT2 contactor. The screw terminals handle two conductors per clamp — 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², or 2x 4 mm² — which is handy when you're daisy-chaining common wires across multiple auxiliary blocks. AWG equivalents are 2x 20–16, 2x 18–14, or 1x 12. Out here in the grease, the thing that keeps a contactor alive is how it handles the environment. The 3RH1140-1AF10 operates from -25 to +60 °C and takes a 10g shock at 5 ms or 5g at 10 ms — that's enough for most conveyor lines and pump skids, though I'd still mount it away from the hammer end of a vibrating motor. Contact reliability is rated at one incorrect switching operation per 100 million cycles at 17 V, 1 mA — that's the dry-circuit spec for low-energy signals. If you're switching PLC-level 24 VDC signals, it'll hold up for decades. RoHS compliance date is listed as July 1, 2006, which means it meets the EU substance restrictions. No REACH or UL marking appears in the spec sheet, but the SIRIUS family typically carries CE and cULus — verify the specific approval on the nameplate for your jurisdiction.","metaTitle":"Siemens 3RH1140-1AF10 SIRIUS Auxiliary Contactor, 4 NO, 10 A","metaDescription":"Siemens 3RH1140-1AF10 SIRIUS Size S00 auxiliary contactor, 4 instantaneous NO contacts, 10 A AC-12 rated, IP20 front, screw/snap-on mount. Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"72 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Width":"45 mm","Height":"57.5 mm","at 60 Hz":"0.85 ... 1.1","1 Rated Value":"60 Hz","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-55 ... +80 °C","Fastening Method":"screw and snap-on mounting","Shock Resistance":"10g / 5 ms and 5g / 10 ms","Delayed Switching":"0","Lagging Switching":"0","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","Product Brand Name":"SIRIUS","Contact Reliability":"one incorrect switching operation of 100 million switching operations (17 V, 1 mA)","Degree Of Pollution":"3","Product Designation":"Auxiliary contactor","at 24 V rated value":"10 A","Of Contactor Typical":"30 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.27 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 50 Hz rated value":"230 V","at 500 V rated value":"2 A","at 60 Hz rated value":"264 V","at 690 V rated value":"1 A","Instantaneous Contact":"4","For Auxiliary Contacts":"0","Make-Before-Break Switching":"0","Substance Prohibitance (Date)":"07/01/2006","protection class IP on the front":"IP20","Product Extension Auxiliary Switch":"Yes","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","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)","Touch Protection Against Electrical Shock":"finger-safe","with low demand rate according to SN 31920":"40 %","Of Auxiliary Contacts Instantaneous Contact":"0","apparent holding power of magnet coil at AC":"4.6 VA","apparent pick-up power of magnet coil at AC":"27 VA","with high demand rate according to SN 31920":"75 %","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"4","Type Of Voltage Of The Control Supply Voltage":"AC","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","Required Spacing With Side-By-Side Mounting At The Side":"0 mm","Inductive Power Factor With The Holding Power Of The Coil":"0.27","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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=154584&mlfb=3RH1140-1AF10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1140-1AF10/alternatives.json"},"ai":{"faq":[{"question":"What is the 3RH1140-1AF10 used for?","answer":"It's an auxiliary contactor that adds four normally-open instantaneous contacts to a motor starter or contactor circuit. It mirrors the main contactor's state for control signaling — PLC feedback, relay coils, indicator lamps."},{"question":"What are the key ratings of the 3RH1140-1AF10?","answer":"Four NO instantaneous contacts rated 10 A at 24 V and 10 A maximum in AC-12 resistive duty. Coil draws at 60 Hz: 0.85–1.1 A. Operating temperature -25 to +60 °C. IP20 front protection. Size S00 frame: 45 mm wide, 57.5 mm tall, 72 mm deep."},{"question":"Will the 3RH1140-1AF10 drop into a panel wired for a 3RH2440-1AP00?","answer":"Not without checking the coil voltage and contact configuration. The 3RH1140-1AF10 has 4 NO contacts only, while the 3RH2440-1AP00 may differ in contact arrangement or coil rating. Both are Size S00 with the same footprint, so the physical swap is possible if the wiring matches."},{"question":"Where can I buy the 3RH1140-1AF10?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an inquiry for a firm offer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1140-1AF10","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/3RH1140-1AF10 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}}