{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2742-5HD10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2742-5HD10","canonicalUrl":"https://aoctrl.com/siemens/3RV2742-5HD10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2742-5HD10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker, 3RV2742-5HD10, S3 frame, 45 A rated operational current, 100 kA breaking capacity at 240 V AC, UL 489 system protection.","salesMarkdown":"The Siemens SIRIUS 3RV2742-5HD10 is a Size S3 circuit breaker designed for system protection per UL 489 / CSA C22.2 No. 5. It carries a 45 A rated operational current and delivers 100 kA breaking capacity at 240 V AC, with the same 100 kA at 400 V AC — meaning it can safely interrupt fault currents up to that level without cascading upstream, a key spec for panel coordination studies. Dimensions are 170 mm high, 70 mm wide, 176 mm deep, with required clearances of 70 mm above and below, 10 mm at the sides — a compact S3 footprint that fits standard panel layouts. Main circuit terminals accept solid or stranded wire: 2x (2.5 … 16 mm²) or 1x (10 … 70 mm²); auxiliary contacts take 2x (2.5 … 16 mm²). Screw-type terminals with M8 main-contact screws, hex-socket driver (4 mm tip). AWG 8 for main contacts. Lifecycle status is active (current production). Substance prohibitance (RoHS) compliance date is 03/01/2017. Relative humidity during operation 10 to 95 %. No ground-fault or phase-failure detection built in.","metaTitle":"Siemens SIRIUS 3RV2742-5HD10 Circuit Breaker, 45 A, 100 kA a","metaDescription":"Siemens SIRIUS 3RV2742-5HD10 circuit breaker, 45 A rated current, 100 kA breaking capacity at 240 V AC. UL 489 system protection. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"176 mm","Solid":"2x (2.5 ... 16 mm²)","Width":"70 mm","title":"3RV2742-5HD10","Height":"170 mm","Upwards":"70 mm","Downwards":"70 mm","At The Side":"10 mm","Rated Value":"20 ... 600 V","description":"Circuit breaker size S3 for system protection with approval circuit breaker UL 489, CSA C22.2 No.5-02 A-release 45 A N-release 585 A screw terminal","During Storage":"-50 ... +80 °C","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","During Transport":"-50 ... +80 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715","For Main Contacts":"M8","Mounting Position":"any","Solid Or Stranded":"2x (2,5 ... 50 mm²), 1x (10 ... 70 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 240 V rated value":"100 kA","at 400 V rated value":"50 kA","Design Of The Product":"For system protection according to UL 489/CSA C22.2 No. 5","Ground Fault Detection":"No","Phase Failure Detection":"No","For Main Current Circuit":"screw-type terminals","at AC at 240 V rated value":"100 kA","at AC at 400 V rated value":"100 kA","Design Of Screwdriver Shaft":"Hexagonal socket","Size Of The Circuit-Breaker":"S3","Size Of The Screwdriver Tip":"4 mm","Of The Main Contacts Typical":"25 000","at AC in hot operating state":"18 W","Of Auxiliary Contacts Typical":"25 000","Substance Prohibitance (Date)":"03/01/2017","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"45 A","at AWG cables for main contacts":"8","Design Of The Short-Circuit Trip":"magnetic","Product Extension Auxiliary Switch":"Yes","Relative Humidity During Operation":"10 ... 95 %","Display Version For Switching Status":"Handle","Surge Voltage Resistance Rated Value":"8 kV","at AC in hot operating state per pole":"6 W","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"2x (2.5 ... 35 mm²), 1x (2.5 ... 50 mm²)","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","with low demand rate according to SN 31920":"50 FIT","Finely Stranded Without Core End Processing":"2x (10 ... 35 mm²), 1x (10 ... 50 mm²)","For Main Contacts With Screw-Type Terminals":"4.5 ... 6 N·m","with high demand rate according to SN 31920":"50 %","shock resistance according to IEC 60068-2-27":"25 g / 11 ms (rectangular impulse and sine pulse)","Electrical Endurance (Operating Cycles) Typical":"25 000","at 480 AC Y/277 V according to UL 489 rated value":"65 kA","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Arrangement Of Electrical Connectors For Main Current Circuit":"Top and bottom","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"585 A","insulation voltage with degree of pollution 3 at AC rated value":"1 000 V","at AWG cables for main contacts for box terminal using the front clamping point":"8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/587f9fa7bf72aa495c2660551d8b40d3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=630014&mlfb=3RV2742-5HD10"},"ai":{"faq":[{"question":"What is the breaking capacity of 3RV2742-5HD10?","answer":"100 kA at 240 V AC and also 100 kA at 400 V AC."},{"question":"What wire sizes does the 3RV2742-5HD10 accept?","answer":"Main contacts accept 2x (2.5 … 16 mm²) solid/stranded or 1x (10 … 70 mm²); auxiliary contacts accept 2x (2.5 … 16 mm²)."},{"question":"Where can I buy 3RV2742-5HD10?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2742-5HD10","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/3RV2742-5HD10 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}}