{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2244-2BB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2244-2BB40","canonicalUrl":"https://aoctrl.com/siemens/3RH2244-2BB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2244-2BB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2244-2BB40 auxiliary contactor, size S00, 4 NO instantaneous contacts, 24 VDC coil, screw and snap-on 35 mm DIN rail mounting, 45 mm width.","salesMarkdown":"## Panel fit and mounting constraints The 3RH2244-2BB40: Its 45 mm width and 121 mm depth mean it occupies one standard modular unit on the rail, leaving room for adjacent devices in a crowded panel. ## Rated current and contact configuration This contactor carries 4 normally-open instantaneous contacts. That derating curve means the contactor's thermal capacity is the limiting factor at higher voltages — not the contact material itself. For a 400 V control circuit, budget 3 A per contact as the continuous rating. The coil is 24 VDC with a closing power and holding power of 4 W each. That low holding power means the coil won't overheat in a sealed enclosure, but the inrush at pickup is the same 4 W — no extra surge to stress a 24 VDC power supply. The substance prohibition date of October 1, 2009 aligns with RoHS compliance for that vintage. Arcing time is 10-15 ms at AC and 7-13 ms at DC. That arc duration is short enough to avoid contact welding in most inductive load applications, but the DC arcing time is tighter — factor that into the contactor's DC switching capability.","metaTitle":"Siemens 3RH2244-2BB40 SIRIUS Auxiliary Contactor, 45mm","metaDescription":"Siemens 3RH2244-2BB40 SIRIUS auxiliary contactor, size S00, 4 NO contacts, 24 VDC coil. Rated 10 A at 24 V. Screw and snap-on 35 mm DIN rail mounting.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"121 mm","Width":"45 mm","at AC":"10 000 1/h","at DC":"7 ... 13 ms","title":"3RH2244-2BB40","Height":"70 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"24 V","description":"contactor relay, 4 NO + 4 NC, 24 V DC, size S00, spring-loaded 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 ... 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","at AWG cables for auxiliary contacts":"2x (20 ... 12)","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","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"2x (0.5 ... 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 %","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","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":"spring-loaded 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":"$33.02","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=352635&mlfb=3RH2244-2BB40"},"ai":{"faq":[{"question":"What is the 3RH2244-2BB40 rated current at 400 V?","answer":"This is the continuous current each normally-open contact can carry at that voltage level."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2244-2BB40","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/3RH2244-2BB40 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}}