{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-1KA10-0DA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-1KA10-0DA0","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-1KA10-0DA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-1KA10-0DA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV2021-1KA10-0DA0 circuit breaker for system protection, S0 frame, 100 kA breaking capacity at 400 V AC, CLASS 10 trip class, 3 kW motor rating at 230 V, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"The Siemens SIRIUS 3RV2021-1KA10-0DA0 is a circuit breaker designed for system protection — meaning it sits upstream of a motor starter or contactor to guard against short circuits and overloads in the distribution path, not as a standalone motor-protective device. ## Breaking capacity — the number that decides selectivity At 400 V AC, this breaker interrupts 100 kA. Same at 240 V AC. ## Motor protection and trip class Rated motor power at 230 V is 3 kW. Trip class is CLASS 10 — that's the standard for standard-duty motor starts (pumps, fans, compressors) where the start time stays under 10 seconds. If you're driving a high-inertia load like a centrifuge or a large flywheel, CLASS 10 may trip on start; you'd step to CLASS 20 or 30. The breaker accepts 2x (1 to 2.5 mm²) or 2x (2.5 to 10 mm²) solid or stranded wire at the main contacts, M4 screw terminals. Mounting position is any. Clearances: 50 mm upwards, 50 mm downwards, 30 mm at the side, 0 mm forwards and backwards — so it can be stacked tight front-to-back in a shallow enclosure. Dimensions: 45 mm wide, 97 mm high, 97 mm deep. The S0 frame is the same width as the S00 but taller, so if you're swapping from an S00 breaker, check the height clearance in your enclosure.","metaTitle":"Siemens 3RV2021-1KA10-0DA0 SIRIUS Circuit Breaker, 100 kA at","metaDescription":"Siemens SIRIUS 3RV2021-1KA10-0DA0 circuit breaker for system protection. 100 kA breaking capacity at 400 V AC, CLASS 10 trip, 3 kW at 230 V. S0 frame, DIN rail mount. Active produc","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","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","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 DIN rail according to DIN EN 60715","at AC-3e maximum":"15 1/h","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":"3 kW","at 240 V rated value":"100 kA","at 400 V rated value":"100 kA","at 500 V rated value":"42 kA","at 690 V rated value":"4 kA","Design Of The Product":"for system protection","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","at AC at 500 V rated value":"42 kA","at AC at 690 V rated value":"6 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":"9.25 W","at AC-3 at 400 V rated value":"12.5 A","at AC-3e rated value maximum":"690 V","Of Auxiliary Contacts Typical":"100 000","Substance Prohibitance (Date)":"10/01/2009","at AC-3e at 400 V rated value":"12.5 A","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"12.5 A","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":"6 kV","at AC in hot operating state per pole":"3.1 W","With Side-By-Side Mounting At The Side":"0 mm","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 Sinus","Electrical Endurance (Operating 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":"163 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"9 ... 12.5 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/69e3aae776a3a972c11948ccacc118a3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1421693&mlfb=3RV2021-1KA10-0DA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2021-1KA10-0DA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RV2021-1KA10-0DA0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of 3RV2021-1KA10-0DA0 at 400 V?","answer":"100 kA at 400 V AC. At 240 V AC it's also 100 kA, at 500 V AC it's 42 kA, and at 690 V AC it's 6 kA."},{"question":"What is the trip class and motor rating?","answer":"Trip class is CLASS 10. Motor power rating at 230 V is 3 kW."},{"question":"Will 3RV2021-1KA10-0DA0 fit a panel designed for 3RV2023-4CA10?","answer":"Both are S0 frame size (45 mm wide, 97 mm high, 97 mm deep) with the same DIN rail mounting and clearance requirements, so the footprint is identical. The difference is in the trip range and breaking capacity — the 3RV2023-4CA10 is a higher-current variant. Check that the 3RV2021-1KA10-0DA0's trip setting matches your motor FLA before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-1KA10-0DA0","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/3RV2021-1KA10-0DA0 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}}