{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2244-1BF40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2244-1BF40","canonicalUrl":"https://aoctrl.com/siemens/3RH2244-1BF40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2244-1BF40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, 3RH2244-1BF40, 4 NO, 110 V DC coil, S00 frame size, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"The Siemens 3RH2244-1BF40 is a SIRIUS auxiliary contactor in the S00 frame size, carrying four normally open instantaneous contacts and a 110 V DC coil. It switches control signals or low-power loads in a motor starter or contactor assembly — the auxiliary contacts report status or interlock downstream devices, not carry main motor current. Rated for 10 A at 24 V, 6 A at 230 V, and 1 A at 690 V, so the contact rating drops as voltage rises — match your control voltage to the appropriate column in the spec table. Clearance distances: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side — these are the minimum air gaps to maintain rated insulation (pollution degree 3 environment). ## Coil and switching performance Coil pick-up voltage is 0.8 x rated (88 V DC for this 110 V DC unit), drop-out is 0.1 x rated (11 V DC) — the margin between pick-up and hold ensures reliable pull-in even with a sagging control supply. Closing power and holding power are both 4 W DC — the coil stays cool because there is no AC inrush; a DC coil draws steady current once sealed.","metaTitle":"Siemens 3RH2244-1BF40 SIRIUS Auxiliary Contactor, 4 NO, 110","metaDescription":"Siemens 3RH2244-1BF40 SIRIUS auxiliary contactor, 4 NO contacts, 110 V DC coil, S00 size. 10 A rated at 24 V, 6 A at 230 V. Screw and snap-on 35 mm DIN rail. Active production. Quo","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"117 mm","Width":"45 mm","at AC":"10 000 1/h","at DC":"7 ... 13 ms","title":"3RH2244-1BF40","Height":"57.5 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"110 V","description":"contactor relay, 4 NO + 4 NC, 110 V DC, size S00, screw terminal, captive auxiliary switch","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 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 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":"10 000 000","at 110 V rated value":"3 A","at 220 V rated value":"1.2 A","at 230 V rated value":"6 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":"No","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":"10 A","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","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)","with low demand rate according to SN 31920":"40 %","with high demand rate according to SN 31920":"73 %","number of NC contacts for auxiliary contacts":"4","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":"44 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","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/ecf32d16a8309ac64507aef0576f7964.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=241780&mlfb=3RH2244-1BF40"},"ai":{"faq":[{"question":"What is the 3RH2244-1BF40's width and depth for panel layout?","answer":"Width is 45 mm, depth is 117 mm — the width governs DIN-rail spacing; depth includes the coil terminals and arc chamber."},{"question":"Will the 3RH2244-1BF40 drop into a panel designed for the 3RH2140-1BP40?","answer":"Both are S00 frame size on 35 mm DIN rail, so the mechanical footprint is the same — the difference is contact configuration: 4 NO on the 3RH2244-1BF40 versus a different contact arrangement on the 3RH2140-1BP40, so verify your control wiring matches the NO count."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2244-1BF40","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/3RH2244-1BF40 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}}