{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1421-0EA15","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1421-0EA15","canonicalUrl":"https://aoctrl.com/siemens/3RV1421-0EA15","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1421-0EA15","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS transformer-protection circuit breaker, 3RV1421-0EA15, 0.4 A continuous, Trip Class 10, 100 kA breaking capacity, 45 mm wide, screw and snap-on 35 mm DIN rail mount.","salesMarkdown":"## SIRIUS transformer-protection circuit breaker, 0.4 A, Class 10 The Siemens SIRIUS 3RV1421-0EA15 is a circuit breaker designed specifically for transformer protection, carrying a continuous current rating of 0.4 A and a Trip Class 10 characteristic. It provides phase failure detection and offers a symmetrical breaking capacity of 100 kA across all AC voltage levels from 240 V to 690 V, meaning it can safely interrupt fault currents up to that magnitude without upstream coordination issues. The 45 mm wide housing mounts via screw and snap-on onto a standard 35 mm DIN rail per EN 50022, fitting into a standard control-panel layout. Trip Class 10 means the bimetal element will trip within 10 seconds at 7.2× rated current, protecting the transformer winding from sustained overload without nuisance tripping on normal inrush. The 100 kA breaking capacity at 400 V and 690 V gives the breaker enough interrupting capability to serve as the sole branch-circuit protection in most industrial panels, even on high-fault-capacity mains. The 45 mm width and 96 mm depth fit a standard 80 mm deep enclosure with room for gland plates. Screw terminals accept solid conductors up to 2x 2.5 mm² and stranded up to 2x 6 mm². Zero clearance required at the sides or rear for heat dissipation, so adjacent breakers can be ganged without derating. Substance prohibitance per RoHS applies from 01.05.2012. Operating temperature range is -20 to +60 °C, storage and transport from -50 to +80 °C. Shock resistance rated at 25g for 11 ms. Surge voltage resistance rated at 6 000 V.","metaTitle":"Siemens 3RV1421-0EA15 SIRIUS Circuit Breaker, 0.4 A, Class 1","metaDescription":"Siemens SIRIUS 3RV1421-0EA15 transformer-protection circuit breaker, 0.4 A continuous, Trip Class 10, 100 kA breaking capacity, 45 mm wide, DIN rail mount. Current lifecycle stage,","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"96 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Width":"45 mm","Height":"97 mm","at 24 V":"1 A","at 60 V":"0.15 A","Stranded":"2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²)","at 230 V":"0.5 A","Backwards":"0 mm","Trip Class":"CLASS 10","At The Side":"0 mm","Rated Value":"690 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 standard mounting rail according to DIN EN 50022","Shock Resistance":"25g / 11 ms","Mounting Position":"any","Product Brand Name":"SIRIUS","Product Designation":"circuit breaker","Design Of The Product":"for transformer protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","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","at AC at 500 V rated value":"100 kA","at AC at 690 V rated value":"100 kA","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"5.5 W","Substance Prohibitance (Date)":"01.05.2012","Continuous Current Rated Value":"0.4 A","Design Of The Auxiliary Switch":"transverse","at AWG cables for main contacts":"2x (14 ... 10)","protection class IP on the front":"IP20","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","operating frequency at AC-3 maximum":"15 1/h","Surge Voltage Resistance Rated Value":"6 000 V","at AWG cables for auxiliary contacts":"2x (18 ... 14)","at AC in hot operating state per pole":"1.8 W","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number Of Poles For Main Current Circuit":"3","Touch Protection Against Electrical Shock":"finger-safe","number of CO contacts for auxiliary contacts":"0","operational current at AC-3 at 400 V rated value":"0.4 A","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Design Of The Overcurrent Release And Short-Circuit Release":"thermomagnetic","Arrangement Of Electrical Connectors For Main Current Circuit":"front side","Product Component Removable Terminal For Auxiliary And Control Circuit":"No","Mechanical Service Life (Switching Cycles) Of The Main Contacts Typical":"100 000","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"0.28 ... 0.4 A"}},"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=61141&mlfb=3RV1421-0EA15","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1421-0EA15/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RV1421-0EA15 and get a price?","answer":"The 3RV1421-0EA15 is sourced and quoted to order against an RFQ. Submit a request for quote to confirm current availability and pricing — no stock or price figures are published here."},{"question":"What is 3RV1421-0EA15's depth?","answer":"The depth is 96 mm, with a width of 45 mm and height of 97 mm."},{"question":"What compliance documentation does this part have?","answer":"The part is RoHS compliant with a substance prohibitance date of 01.05.2012. Operating temperature range is -20 to +60 °C, storage and transport from -50 to +80 °C. Shock resistance is 25g at 11 ms, and surge voltage resistance is 6 000 V."},{"question":"Will 3RV1421-0EA15 drop into a panel specified around 3RV1011-0GA10 without rewiring?","answer":"The 3RV1421-0EA15 shares the same 45 mm width and 35 mm DIN rail mounting as the 3RV1011-0GA10, so mechanical fit is identical. However, the 3RV1421-0EA15 is a transformer-protection variant with a 0.4 A continuous rating and Trip Class 10, while the 3RV1011-0GA10 is a standard motor-protection breaker with different trip curves and current ranges. Verify the load type and trip coordination before substituting — the terminal wiring scheme is the same screw-type, but the protection settings differ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1421-0EA15","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/3RV1421-0EA15 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}}