{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2742-5FD10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2742-5FD10","canonicalUrl":"https://aoctrl.com/siemens/3RV2742-5FD10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2742-5FD10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker, 3RV2742-5FD10, size S3, 35 A rated current, for system protection per UL 489/CSA C22.2 No. 5, screw and snap-on 35 mm DIN rail mounting (DIN EN 60715).","salesMarkdown":"The Siemens 3RV2742-5FD10 is a SIRIUS circuit breaker in the S3 frame, rated 35 A operational current at 50/60 Hz. It is designed for system protection and carries UL 489 / CSA C22.2 No. 5 listing — meaning it is certified for branch-circuit protection in North American panels, not just motor-circuit protection. The magnetic short-circuit trip and thermal overload release are both internal, so it combines two functions in one DIN-rail footprint. Breaking capacity at 240 VAC is 100 kA; at 400 VAC it is also 100 kA. That full-rated interrupting capacity at 400 V matters for panels where the fault current at the board is high — common in industrial distribution upstream of motor control centers. The 35 A frame still clears 100 kA at 400 V, which gives selectivity headroom downstream. Mounting position any. Clearances: 70 mm above and below, 10 mm at the sides. The S3 frame is physically larger than the S0 or S00 frames — verify the panel cutout and door cutout before swapping from a smaller frame breaker. Main contacts use M8 screw-type terminals. Accepts solid or stranded: 2x (2.5 … 16 mm²) or 1x (10 … 70 mm²). AWG 8 for the main contacts. The screwdriver shaft is hex socket, 4 mm tip size. The auxiliary switch option is available as a product extension (not included). Relative humidity 10 to 95 % during operation. Substance prohibitance date 03/01/2017 — the part is RoHS-compliant (REACH and RoHS documentation available from the manufacturer).","metaTitle":"Siemens 3RV2742-5FD10 SIRIUS Circuit Breaker, 35 A, UL 489,","metaDescription":"Siemens 3RV2742-5FD10 SIRIUS circuit breaker, 35 A rated current, UL 489 system protection. 100 kA at 240 VAC. Current lifecycle. Sourced to order. Request RFQ.","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","Height":"170 mm","Upwards":"70 mm","Downwards":"70 mm","At The Side":"10 mm","Rated Value":"20 ... 600 V","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":"14 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":"35 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":"4.7 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":"455 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,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=630012&mlfb=3RV2742-5FD10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2742-5FD10/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RV2742-5FD10?","answer":"Submit an RFQ. This part is sourced and quoted to order through independent distribution; availability and current pricing are confirmed at quote time. No stock count or price is published here."},{"question":"What is the closest functional second-source for 3RV2742-5FD10?","answer":"Within the SIRIUS family, the 3RV2011-0BA20 is a smaller S00 frame breaker at a lower current rating. It will not drop into a panel cutout sized for the S3 frame of 3RV2742-5FD10 without mechanical modification. The 3RV2021-4NA25 (S0 frame) and 3RV2023-4DA10 (S0 frame) are also physically smaller and lower-rated. For a functional replacement at 35 A with UL 489 listing, the 3RV2742-5FD10 is the correct S3-frame choice."},{"question":"What is the depth of 3RV2742-5FD10?","answer":"Depth is 176 mm. Width is 70 mm, height is 170 mm."},{"question":"What compliance documentation does this brand provide for 3RV2742-5FD10?","answer":"Siemens provides RoHS and REACH compliance documentation. The part carries a substance prohibitance date of 03/01/2017, confirming RoHS compliance. UL 489 and CSA C22.2 No. 5 listing is part of the design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2742-5FD10","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/3RV2742-5FD10 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}}