{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2421-0EA10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2421-0EA10","canonicalUrl":"https://aoctrl.com/siemens/3RV2421-0EA10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2421-0EA10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker 3RV2421-0EA10, Size S0, for transformer protection, Trip Class 10, 100 kA breaking capacity at 400 V AC, screw and snap-on mounting on 35 mm DIN rail.","salesMarkdown":"## Transformer protection breaker with Class 10 trip The Siemens 3RV2421-0EA10 is a SIRIUS circuit breaker specifically designed for transformer protection, with a Trip Class 10 characteristic that clears overloads quickly enough to protect the transformer winding without nuisance tripping on inrush. Rated breaking capacity reaches 100 kA at 240 V, 400 V, 500 V, and 690 V AC — that is the maximum fault current it can safely interrupt without welding contacts or cascading upstream, so it fits high-fault panels where the available short-circuit current is substantial. Main circuit terminals accept screw-type connections: 2 x (1–2.5 mm²) or 2 x (2.5–10 mm²) solid or stranded. Use a Pozidriv size 2 screwdriver with a 5–6 mm shaft diameter. ## Environmental and lifecycle Rated for operation from -20 °C to +60 °C with temperature compensation active across that range. Storage and transport tolerate -50 °C to +80 °C.","metaTitle":"Siemens 3RV2421-0EA10 SIRIUS Circuit Breaker, 100 kA, Class","metaDescription":"Siemens 3RV2421-0EA10 SIRIUS circuit breaker for transformer protection. 100 kA breaking capacity at 400 V AC, Trip Class 10, Size S0. Available to order — request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"97 mm","Width":"45 mm","title":"3RV2421-0EA10","Height":"97 mm","Upwards":"50 mm","Forwards":"0 mm","Backwards":"0 mm","Downwards":"50 mm","Trip Class":"CLASS 10","At The Side":"30 mm","Rated Value":"20 ... 690 V","description":"Circuit breaker size S0 For transformer protection A-release 0.28...0.4 A Short-circuit release 8.2 A Screw terminal Standard switching capacity","During Storage":"-50 ... +80 °C","at AC-3 maximum":"15 1/h","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","During Transport":"-50 ... +80 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715","For Main Contacts":"M4","Mounting Position":"any","Solid Or Stranded":"2x (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 230 V rated value":"0.1 kW","at 240 V rated value":"100 kA","at 400 V rated value":"100 kA","at 480 V rated value":"0.4 A","at 500 V rated value":"100 kA","at 600 V rated value":"0.4 A","at 690 V rated value":"100 kA","Design Of The Product":"For transformer protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","For Main Current Circuit":"screw-type terminals","Temperature Compensation":"-20 ... +60 °C","at AC at 240 V rated value":"100 kA","at AC at 400 V rated value":"100 kA","at AC at 500 V rated value":"100 kA","at AC at 690 V rated value":"100 kA","Design Of Screwdriver Shaft":"Diameter 5 to 6 mm","Size Of The Circuit-Breaker":"S0","Size Of The Screwdriver Tip":"Pozidriv size 2","at AC-3 rated value maximum":"690 V","Of The Main Contacts Typical":"100 000","at AC in hot operating state":"5.5 W","at AC-3 at 400 V rated value":"0.4 A","Of Auxiliary Contacts Typical":"100 000","Substance Prohibitance (Date)":"10/01/2009","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"0.4 A","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 8)","Design Of The Short-Circuit Trip":"magnetic","Between Main And Auxiliary Circuit":"400 V","Product Extension Auxiliary Switch":"Yes","Relative Humidity During Operation":"10 ... 95 %","Display Version For Switching Status":"Handle","Surge Voltage Resistance Rated Value":"6 kV","at AC in hot operating state per pole":"1.8 W","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²), 1x 10 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","For Main Contacts With Screw-Type Terminals":"2 ... 2.5 N·m","with high demand rate according to SN 31920":"50 %","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"0","shock resistance according to IEC 60068-2-27":"25g / 11 ms","Electrical Endurance (Switching Cycles) Typical":"100 000","Size Of Contactor Can Be Combined Company-Specific":"S00, S0","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":"8.2 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Product Component Removable Terminal For Auxiliary And Control Circuit":"No","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"0.28 ... 0.4 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/99aa050740cfda1b8f017d0927ae0419.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1135044&mlfb=3RV2421-0EA10"},"ai":{"faq":[{"question":"Where can I buy 3RV2421-0EA10 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ to get a firm price and lead time."},{"question":"Will 3RV2421-0EA10 drop into a panel specified around 3RV2011-0AA10?","answer":"The 3RV2421-0EA10 is a different design — it is a Size S0 breaker for transformer protection with a 100 kA breaking capacity, while the 3RV2011-0AA10 is a standard motor-protective circuit breaker. Both mount on 35 mm DIN rail, but the trip characteristic, ratings, and auxiliary options differ. Check the nameplate ratings before swapping."},{"question":"What is the depth of 3RV2421-0EA10?","answer":"The depth is 97 mm, with a width of 45 mm and height of 97 mm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2421-0EA10","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/3RV2421-0EA10 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}}