{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2244-4BW40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2244-4BW40","canonicalUrl":"https://aoctrl.com/siemens/3RH2244-4BW40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2244-4BW40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2244-4BW40 auxiliary contactor, size S00, 4 NO instantaneous contacts, 48 VDC coil, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"## S00 frame, 4 NO — what the contact configuration buys you The 3RH2244-4BW40 is a SIRIUS auxiliary contactor in size S00 — the smallest SIRIUS frame, which keeps the panel footprint tight at 45 mm wide by 57.5 mm tall by 117 mm deep. Four normally-open instantaneous contacts give you four independent signal paths that close when the coil picks up. No auxiliary switch block to add — the 4 NO is integral, so the depth stays at 117 mm without a bolt-on extension. Rated control supply voltage is 48 VDC. The coil draws 4 W closing and 4 W holding — a constant-grip DC magnet, not a pulsed economy coil, so the holding power is the same as the pick-up power. Budget the 4 W continuous dissipation in the enclosure thermal calculation. The contact rating is 10 A at 24 V, which is the highest current on the DC rating table. At 60 V it drops to 4.7 A, at 110 V to 3 A, and at 220 V to 1.2 A. For AC utilization at 230 V the contacts carry 6 A, and at 400 V they carry 3 A. ## Mounting, clearance, and environmental limits These are the free-air spacing requirements for heat dissipation and arc clearance — pack tighter and you risk nuisance tripping or reduced contact life. Pollution degree 3 means it is rated for conductive pollution environments typical of industrial control panels — no additional conformal coating required for normal factory atmospheres. ## Lifecycle and sourcing — active, quoted to order The part is sourced through independent distribution channels. No stock-holding claim is made; each RFQ is handled individually.","metaTitle":"Siemens 3RH2244-4BW40 SIRIUS Auxiliary Contactor, 4 NO","metaDescription":"Siemens 3RH2244-4BW40 SIRIUS auxiliary contactor, size S00, 4 NO contacts, 48 VDC coil. Rated 10 A at 24 V. Active production, quoted to order. DIN rail mount.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"117 mm","Width":"45 mm","at AC":"10 000 1/h","at DC":"7 ... 13 ms","title":"3RH2244-4BW40","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":"48 V","description":"contactor relay, 4 NO + 4 NC, 48 V DC, size S00, ring cable lug connection, 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 standard mounting 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","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","reference code according to IEC 81346-2":"K","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":"ring terminal lug connection","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=506637&mlfb=3RH2244-4BW40"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RH2244-4BW40?","answer":"The 6ED1052-1MD08-0BA1 is a different product class (a LOGO! module, not a contactor) and is not a functional substitute. The 3RH2244-4BW40 is the Siemens standard part for 4 NO, 48 VDC auxiliary switching in size S00."},{"question":"What compliance documentation does Siemens provide for 3RH2244-4BW40?","answer":"The part carries a RoHS substance prohibition date of 10/01/2009, indicating compliance with the EU RoHS directive. Surge voltage resistance is rated at 6 kV. Pollution degree 3 aligns with IEC 60947-1 requirements for industrial environments. Full CE, UL, and CSA declarations are standard for SIRIUS products but are not individually listed in this record."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2244-4BW40","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/3RH2244-4BW40 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}}